Glass components, glass component laminates, input devices, input / display devices, exterior glass components, housings, doors, containers, and methods for manufacturing glass components.

Abstract

Provided are: a glass member that excels in tactile sensation such as the feel of writing by an input pen and the feel of touch by a fingertip; a glass member laminate having the glass member; an input device; an input display device; a glass member for exterior use; a housing; a door body; a container; and a method for manufacturing the glass member.　A glass member having an irregular principal surface, the surface irregularities including: first irregularities in which the arithmetic mean height Sa1 is 2-500 nm and the average length RSm1 of roughness curve elements is 2-100 μm when it is assumed that the cutoff value of a high-pass filter λc1 is 14 μm and the cutoff value of a low-pass filter λs1 is 0.35 μm; and second irregularities in which the arithmetic mean height Sa2 in a square region with one side measuring 5 μm is 0.7-50 nm when it is assumed that the cutoff value of a high-pass filter λc2 is 2.5 μm.

Description

[Technical Field]

[0001] The present invention relates to glass members, glass member laminates comprising said glass members, input devices, input / display devices, exterior glass members, housings, doors, containers, and technologies for manufacturing said glass members. [Background technology]

[0002] Input devices that allow input of characters and shapes using an input pen or fingertip, such as touch panels, have been known for some time. In such input devices, a cover member made of a transparent glass material such as a glass substrate is placed on the front side of a display device such as a liquid crystal display, and various input operations can be performed by touching and moving an input pen or fingertip against the surface (main surface) of the cover member. Generally, the surface of the cover member is pre-formed with irregularities for purposes such as improving tactile sensations, such as the feel when writing with an input pen or the feel when touching with fingertips, or ensuring the visibility of the display device through the cover member. Furthermore, in recent years, there has been a growing demand for higher quality in terms of tactile sensation.

[0003] Therefore, as a technology to further improve the above-mentioned tactile sensation, for example, Patent Document 1 describes an arithmetic mean roughness Ra0.25 mm according to JIS B0601:2001. 25 The root mean square slope RΔq2.5 for the roughness curve of JIS B0601:2001 with a cutoff value of 2.5 mm, and the root mean square slope RΔq0 for the roughness curve of JIS B0601:2001 with a cutoff value of 0.025 mm. 025 However, the following conditions apply: 0.08 μm ≤ Ra0. 25 The value is ≤1.35 μm, and 0.11 < [RΔq 2.5 / RΔq 0. 025 A surface member for a touch panel is disclosed, having a surface consisting of an uneven surface that satisfies ≤ 0.80. Furthermore, Patent Document 2 states that the haze value is less than 1% and the Martens hardness is 2000-4000 N / mm². 2 A cover glass for a pen input device is disclosed, having fine irregularities within a certain range. [Prior art documents] [Patent Documents]

[0004] [Patent Document 1] Patent No. 6819446 [Patent Document 2] International Publication No. 2015 / 072297 [Overview of the project] [Problems that the invention aims to solve]

[0005] However, in the touch panel surface material described in Patent Document 1, the surface irregularities formed on the surface are relatively large, so while some improvement in writing feel with an input pen can be expected, the feel to the fingertips is rough, making it difficult to achieve a high-quality tactile sensation. Furthermore, the high haze value causes the display screen to appear whitish through the surface, making it difficult to maintain sufficient visibility. Furthermore, while the cover glass in Patent Document 2 has its haze value suppressed by the fine irregularities formed on its surface, thus ensuring sufficient visibility, such uniform irregularities may result in excessive friction when the input pen or fingertip is brought into contact with and moved, potentially worsening the tactile sensation, such as the feel of writing with the input pen or the feel of touching it with the fingertip.

[0006] This invention has been made in view of the problems of the current situation described above, and aims to provide a glass member that has excellent tactile properties such as the feel of writing with an input pen and the feel of touching with fingertips, a glass member laminate equipped with the glass member, an input device, an input display device, an exterior glass member, a housing, a door, a container, and a method for manufacturing the glass member. [Means for solving the problem]

[0007] The problems that this invention aims to solve are as described above, and the various embodiments for solving these problems will now be explained.

[0008] That is, the glass member according to embodiment 1 of the present invention is a glass member having a main surface having irregularities, characterized in that the irregularities include a first type of irregularity where the arithmetic mean height Sa1 is 2 to 500 nm when the cutoff value of the high-pass filter λc1 is 14 μm and the cutoff value of the low-pass filter λs1 is 0.35 μm, and the average length RSm1 of the roughness curve elements is 2 to 100 μm, and a second type of irregularity where the arithmetic mean height Sa2 is 0.7 to 50 nm when the cutoff value of the high-pass filter λc2 is 2.5 μm in a square region with sides of 5 μm. With this configuration, the glass member according to the present invention makes it possible to achieve a superior writing feel when performing input operations with an input pen on the main surface, as the tip of the input pen is neither excessively slippery nor excessively slippery. Furthermore, when manipulating the main surface with fingertips, it avoids excessive roughness, resulting in a superior tactile experience.

[0009] Furthermore, in the glass member according to embodiment 2 of the present invention, it is preferable that, in the first uneven surface in embodiment 1, the maximum height roughness Rz1 is 25 to 700 nm when the cutoff value of the high-pass filter λc1 is 14 μm and the cutoff value of the low-pass filter λs1 is 0.35 μm. With this configuration, when input operations are performed on the main surface of the glass member according to the present invention using an input pen and a fingertip, the frictional force transmitted to the tip of the input pen and the fingertip via the first and second irregularities increases and decreases appropriately, thereby further improving the writing feel with the input pen and the tactile feel with the fingertip.

[0010] Furthermore, the glass member according to embodiment 3 of the present invention is a glass member having a main surface having irregularities, characterized in that the irregularities include a first type of irregularity where the arithmetic mean height Sa1 is 2 to 500 nm when the cutoff value of the high-pass filter λc1 is 50 μm and the cutoff value of the low-pass filter λs1 is 0.35 μm, and the average length RSm1 of the roughness curve elements is 2 to 100 μm, and a second type of irregularity where the arithmetic mean height Sa2 is 0.7 to 50 nm when the cutoff value of the high-pass filter λc2 is 2.5 μm in a square region with sides of 5 μm. With this configuration, the glass member according to the present invention makes it possible to achieve a superior writing feel when performing input operations with an input pen on the main surface, as the tip of the input pen is neither excessively slippery nor excessively slippery. Furthermore, when manipulating the main surface with fingertips, it avoids excessive roughness, resulting in a superior tactile experience.

[0011] Furthermore, in the glass member according to embodiment 4 of the present invention, it is preferable that, in the first uneven surface in embodiment 3, the maximum height roughness Rz1 is 25 to 1500 nm when the cutoff value of the high-pass filter λc1 is 50 μm and the cutoff value of the low-pass filter λs1 is 0.35 μm. With this configuration, when input operations are performed on the main surface of the glass member according to the present invention using an input pen and a fingertip, the frictional force transmitted to the tip of the input pen and the fingertip increases and decreases appropriately, thereby further improving the writing feel with the input pen and the tactile feel with the fingertip.

[0012] Furthermore, in the glass member according to embodiment 5 of the present invention, in any one embodiment of embodiments 1 to 4, it is preferable that the developed area ratio Sdr2 of the interface in the second unevenness is 3 to 60% when the cutoff value of the high-pass filter λc2 in a square region with sides of 5 μm is 2.5 μm. With such a configuration, according to the glass member of the present invention, it is possible to further improve the writing comfort with an input pen and the touch comfort with a fingertip.

[0013] Further, in the glass member according to aspect 6 of the present invention, in the second unevenness according to any one of aspects 1 to 5, when the cutoff value of the high-pass filter λc2 in a square region having a side length of 5 µm is 2.5 µm, the root mean square gradient Sdq2 is preferably 2 to 80. With such a configuration, according to the glass member of the present invention, it is possible to further improve the writing comfort with an input pen and the touch comfort with a fingertip.

[0014] Further, in the glass member according to aspect 7 of the present invention, in the second unevenness according to any one of aspects 1 to 6, when the cutoff value of the high-pass filter λc2 in a square region having a side length of 5 µm is 2.5 µm, the maximum height Sz2 is preferably 10 to 400 nm. With such a configuration, according to the glass member of the present invention, when an input operation is performed on the main surface with an input pen and a fingertip, the frictional force transmitted to the pen tip of the input pen and the fingertip via the first unevenness and the second unevenness repeats moderate increase and decrease, so that the writing comfort with the input pen and the touch comfort with the fingertip can be further improved.

[0015] Further, in the glass member according to aspect 8 of the present invention, in the second unevenness according to any one of aspects 1 to 7, when the cutoff value of the high-pass filter λc2 in a square region having a side length of 5 µm is 2.5 µm, the maximum peak height Sp2 is preferably 6 to 200 nm. With such a configuration, according to the glass member of the present invention, it is possible to further improve the writing comfort with an input pen and the touch comfort with a fingertip.

[0016] Furthermore, a glass member laminate according to aspect 9 of the present invention is characterized by comprising: the glass member according to any one of aspects 1 to 8; and an antifouling layer provided on at least a part of the main surface of the glass member. With this configuration, it is possible to realize a glass member laminate that is excellent in tactile sensations such as writing comfort with an input pen and touch feeling with a fingertip, and has an antifouling function.

[0017] Furthermore, an input device according to aspect 10 of the present invention is characterized by comprising: the glass member according to any one of aspects 1 to 8, or the glass member laminate according to aspect 9; and a detection circuit that detects an input position. With this configuration, it is possible to realize an input device that is excellent in tactile sensations such as writing comfort with an input pen and touch feeling with a fingertip, or an input device that further has an antifouling function.

[0018] Furthermore, an input display device according to aspect 11 of the present invention is characterized by comprising the input device according to aspect 10 and a display device. With this configuration, it is possible to realize an input display device that is excellent in tactile sensations such as writing comfort with an input pen and touch feeling with a fingertip, or an input display device that further has an antifouling function.

[0019] Furthermore, an exterior glass member according to aspect 12 of the present invention is characterized by being constituted by the glass member according to any one of aspects 1 to 8, or the glass member laminate according to aspect 9. With this configuration, it is possible to realize an exterior glass member that is excellent in tactile sensations such as touch feeling with a fingertip, or an exterior glass member that further has an antifouling function.

[0020] Furthermore, a housing according to aspect 13 of the present invention is characterized by comprising the exterior glass member according to aspect 12. With this configuration, it is possible to realize a housing that is excellent in tactile sensations such as touch feeling with a fingertip, or a housing that further has an antifouling function.

[0021] Furthermore, the door body according to embodiment 14 of the present invention is characterized by comprising the exterior glass member of embodiment 12. This configuration makes it possible to create a door body with excellent tactile properties, such as a pleasant feel to the touch, or even a door body that also has stain-resistant properties.

[0022] Furthermore, the container according to embodiment 15 of the present invention is characterized by comprising the exterior glass member of embodiment 12. By having such a configuration, it is possible to create a container that has excellent tactile properties, such as a pleasant feel to the touch, or even a stain-resistant function.

[0023] Furthermore, the method for manufacturing a glass member according to the present invention is a method for manufacturing a glass member according to any one of the eight embodiments, comprising: a first forming step of applying hydrofluoric acid etching to the main surface of the glass member to form the first irregularities; and a second forming step of applying wet blasting or sandblasting to the first irregularities formed in the first forming step to form the second irregularities. With this configuration, the manufacturing method for glass members according to the present invention makes it possible to manufacture glass members that provide excellent writing comfort with an input pen, as the tip of the input pen does not slip excessively when an input operation is performed on the main surface with an input pen. Furthermore, when performing input operations on the main surface with fingertips, it is possible to manufacture glass components that have a superior feel to the touch without experiencing excessive roughness. [Effects of the Invention]

[0024] The present invention provides the following effects: In other words, according to the glass member, glass member laminate, input device, input display device, exterior glass member, housing, door, container, and method for manufacturing the glass member according to the present invention, the tactile sensation, such as the feel of writing with an input pen or the feel of touching with fingertips, can be made excellent. [Brief explanation of the drawing]

[0025] [Figure 1] This is a schematic cross-sectional side view showing the configuration of an input display device according to one embodiment of the present invention. [Figure 2] This diagram illustrates the measured cross-sectional curve on the main surface of a glass component, and is a schematic enlarged cross-sectional view showing the shapes of the first and second irregularities, respectively. [Figure 3] These diagrams illustrate various parameters that represent surface roughness, with (a) being a schematic diagram illustrating various parameters for surface roughness and (b) being a schematic diagram illustrating various parameters for line roughness. [Figure 4] This figure illustrates the cutoff values ​​of the high-pass filter λc1 and the low-pass filter λs1, and shows a graph illustrating the relationship between wavelength and amplitude transmittance. [Figure 5] The first diagram illustrates the reason for setting an upper limit on the average length RSm1 of the roughness curve elements, where (a) is a schematic diagram when RSm1 exceeds 100 μm, and (b) is a schematic diagram when RSm1 is 100 μm or less. [Figure 6] This diagram illustrates the interface area ratio Sdr and root mean square slope Sdq, which are parameters representing surface roughness. (a) is a schematic diagram showing the case where the defining region is a perfectly flat surface, and (b) is a schematic diagram showing the case where the defining region is a bellows-shaped plane with a slope. [Figure 7] This is a process diagram showing a method for manufacturing a glass component according to one embodiment of the present invention. [Figure 8] The figures show an example of another embodiment of the present invention, where (a) is a schematic diagram showing an example of an electronic device equipped with a housing made of an exterior glass member, (b) is a schematic diagram showing an example of an electronic device equipped with a housing and a door made of an exterior glass member, and (c) is a schematic diagram showing an example of a container equipped with an exterior glass member. [Figure 9] This is a schematic cross-sectional side view showing another configuration of an input display device according to one embodiment of the present invention. [Modes for carrying out the invention]

[0026] Next, one embodiment of the present invention will be described using Figures 1 to 9.

[0027] [Overall configuration of input display device 1] First, the overall configuration of the input display device 1 embodied in this embodiment will be explained using Figure 1. The input display device 1 mainly comprises a display element 10, which is an example of a display device that displays images, and an input device 20 into which information such as characters and figures are input by an input pen 2 or a fingertip 3. Furthermore, the input device 20 includes a digitizer circuit 21, which is an example of a detection circuit for detecting the above information (more specifically, the input position of the input pen 2 or fingertip 3), and a glass substrate 22, which is an example of a glass member and is provided as a cover member.

[0028] The display element 10, the digitizer circuit 21, and the glass substrate 22 are stacked on top of each other, with the glass substrate 22 positioned on the front side of the display element 10 and the digitizer circuit 21 positioned on the back side of the display element 10. Furthermore, as shown in Figure 9, the digitizer circuit 21 and glass substrate 22 may be arranged on the front side of the display element 10, or the digitizer circuit 21 may be an integrated, built-in type with the display element 10. Note that the input device 20 may have one digitizer circuit 21 or two or more.

[0029] In the above description, the "front side" of the display element 10 refers to the side on which the image is displayed, and the "back side" of the display element 10 refers to the side opposite to the side on which the image is displayed. In this embodiment, for example, the "front side" of the display element 10 is the upper side of the paper in Figure 1, and the "back side" of the display element 10 is the lower side of the paper in Figure 1.

[0030] The input display device 1 is configured such that by moving the tip 2a of the input pen 2 or the fingertip 3 while it is in contact with the main surface 22a of the glass substrate 22 (the surface of the glass substrate 22 opposite to the display element 10 side), the position of the pen tip 2a or fingertip (input position) is detected by the digitizer circuit 21, and input operations such as characters and figures can be performed. An example of such an input display device 1 is a tablet terminal.

[0031] The term "tablet device" broadly refers to an input / display device equipped with both display and input functions, and includes devices such as tablet PCs, mobile PCs, smartphones, and game consoles.

[0032] The glass substrate 22 is made of a transparent glass plate on which irregularities are formed on at least one main surface (in this embodiment, the main surface 22a). Furthermore, the glass substrate 22 is positioned such that the main surface 22a, which has irregularities formed on it, is the surface that comes into contact with the input pen 2 or fingertip 3.

[0033] Here, the glass substrate 22 can be a glass plate made of, for example, aluminosilicate glass, borosilicate glass, alkali-free glass, soda-lime glass, tempered glass, or Li2O-Al2O3-SiO2 crystallized glass. Furthermore, if the glass substrate 22 is made of a glass plate made of alkali-containing aluminosilicate glass, the glass substrate 22 may have a chemically strengthened layer on its surface. Details of the glass substrate 22 will be described later.

[0034] The digitizer circuit 21 is equipped with a detection sensor that detects input operations performed by the input pen 2 or fingertip 3. Here, the input pen 2 is an input device shaped like a writing instrument such as a pencil or ballpoint pen, and has a pen tip 2a which is an example of a friction element that comes into contact with the glass substrate 22. The pen tip 2a is made of a synthetic resin material such as elastomer or polyacetal resin, or conductive fiber or felt.

[0035] In the input pen 2, if the pen tip 2a is made of the above-mentioned material, it will easily grip even uneven surfaces. Therefore, when the pen tip 2a of the input pen 2 is brought into contact with the main surface 22a of the glass substrate 22, which has irregularities formed on it, and moved, a particularly excellent writing feel can be achieved.

[0036] [Configuration of the glass substrate 22] Next, the configuration of the glass substrate 22 will be described in detail with reference to Figures 1 to 6. As described above, the glass substrate 22 is an example of a glass member according to the present invention, and as shown in Figure 1, it has a main surface 22a consisting of irregularities.

[0037] As shown in Figure 2, the above-mentioned irregularities are mainly composed of two types of irregularities, large and small, consisting of a first irregularity and a second irregularity. The first type of surface roughness has an arithmetic mean height Sa1 of 2 to 500 nm and an average length RSm1 of the roughness curve elements of 2 to 100 μm. Furthermore, the second type of surface irregularity has an arithmetic mean height Sa2 of 0.7 to 50 nm, preferably 0.8 nm or more, 0.9 nm or more, 1.0 nm or more, 1.5 nm or more, 2.0 nm or more, and 2.5 nm or more.

[0038] Here, the "arithmetic mean height Sa (Sa1 and Sa2)" mentioned above is a parameter defined by ISO 25178, which is a parameter that extends the contour curve indicating the cross-sectional shape of the uneven surface to a surface. Specifically, as shown in Figure 3(a), the arithmetic mean height Sa represents the average of the absolute distances between points of the first or second irregularities that constitute the irregularities (for example, the height Xh to the peak of the peak Xa and the depth Yh to the peak of the valley Ya) with respect to the average surface Z on the main surface 22a of the glass member 22 (Sa = ((Xh1 + Xh2 + ... + Xh n )+(Yh1+Yh2+···+Yh n )) / 2n).

[0039] Furthermore, the "average length RSm (RSm1) of the roughness curve elements" mentioned above is a parameter defined by JIS B0601:2001, and represents the average pitch between adjacent concave and convex parts in a contour curve that shows the cross-sectional shape of a surface with concave and convex areas. Specifically, as shown in Figure 3(b), the contour curve showing the cross-sectional shape of the first unevenness is formed by a series of relief curves 22a1·22a1···, and each relief curve 22a1 is composed of adjacent peaks Xb and valleys Yb.

[0040] Furthermore, although the peaks Xb and valleys Yb described above each have multiple irregularities, if these additional irregularities fall below a predetermined threshold (for example, 10% of the highest height (or highest depth) of the peak Xb (or valley Yb)), they are considered noise and recognized as part of the peak Xb or valley Yb.

[0041] The average length RSm of the roughness curve element is expressed by the average length of these multiple relief curves 22a1·22a1···RSm (RSm = (RSm1 + RSm2 + ···RSm n ) / n).

[0042] As shown in Figures 2 and 4, the arithmetic mean height Sa1 and the average length RSm1 of the roughness curve elements in the first unevenness are values ​​obtained when the cutoff value of the high-pass filter λc1 for blocking long-wavelength components from the measured contour curve of the main surface 22a is set to 14 μm or 50 μm, and the cutoff value of the low-pass filter λs1 for blocking short-wavelength components from the side-turned contour curve of the main surface 22a is set to 0.35 μm.

[0043] Furthermore, the arithmetic mean height Sa2 in the second unevenness is a value obtained in an even more microscopic measurement area compared to the setting range of the high-pass filter λc1 and low-pass filter λs1 in the first unevenness described above. In this application, it is the value obtained when the cutoff value of the high-pass filter λc2 is set to 2.5 μm in a square area with sides of 5 μm.

[0044] Thus, the irregularities formed on the main surface 22a of the glass substrate 22 are composed of first irregularities and second irregularities that are even more microscopic than the first irregularities, and the shape of the first irregularities is formed by the wave-like undulation of the continuously connected second irregularities.

[0045] Furthermore, in the input display device 1 in this embodiment (see Figure 1), the shapes of the first and second irregularities on the main surface 22a of the glass substrate 22 are formed within the range of the above-described conditions, thereby maintaining the visibility of the display element 10 while improving tactile sensations such as the writing feel with the input pen 2 and the touch feel with the fingertips 3.

[0046] Specifically, when input operations are performed on the main surface 22a using the input pen 2, the pen tip 2a of the input pen 2 is neither excessively slippery nor excessively slippery, resulting in a superior writing experience with the input pen 2. Furthermore, when input operations are performed on the main surface 22a with a fingertip 3, there is no excessive roughness, and the tactile feel with the fingertip 3 is excellent.

[0047] Furthermore, by configuring the first and second irregularities within the range of the above-mentioned conditions, it is possible to suppress the occurrence of glare known as sparkling due to the interference of scattered light caused by the irregularities. Furthermore, in this embodiment, no resin layer or the like is formed on the main surface 22a of the glass substrate 22, and the uneven shape is directly formed on the main surface 22a. As a result, it has high scratch resistance and is difficult to scratch, and therefore does not reduce the visibility of the display element 10.

[0048] Incidentally, the first type of unevenness affects the contact between the main surface 22a of the glass substrate 22 and the input pen 2 or fingertip 3. In other words, the pen tip 2a of the input pen 2 and the fingertip 3 mainly contact the convex portions of the first unevenness with respect to the main surface 22a of the glass substrate 22, and do not easily contact the concave portions of the said unevenness. In other words, by forming the first irregularities within the range of the above-described conditions, it is possible to reduce the contact area between the main surface 22a of the glass substrate 22 and the input pen 2 or fingertip 3.

[0049] Therefore, when the tip 2a of the input pen 2 or the fingertip 3 is brought into contact with the main surface 22a of the glass substrate 22, which has irregularities formed on it, and moved, the frictional force generated between the tip 2a or the fingertip 3 will increase and decrease in a moderate manner. Therefore, it is possible to prevent an excessive increase or decrease in frictional force between these pen tips 2a or fingertips 3 and the main surface 22a of the glass substrate 22, thereby improving the tactile sensation, such as the writing feel with the input pen 2 and the touch feel with the fingertips 3.

[0050] Here, as described above, in this embodiment, the upper limit of the average length RSm1 (see Figure 2) of the roughness curve elements in the first unevenness is set to 100 μm, but it is preferable to set this upper limit to 80 μm, more preferably to 60 μm, even more preferably to 50 μm, particularly preferably to 49 μm, 48 μm, 45 μm, 40 μm, 35 μm, 30 μm, and 25 μm, and most preferably to 20 μm. Furthermore, in this embodiment, the lower limit of the average length RSm1 of the roughness curve elements in the first unevenness is set to 2 μm, but it is preferable to set this lower limit to 2.5 μm, more preferably to 3 μm, even more preferably to 3.5 μm, particularly preferably to 4 μm, greater than 4 μm, 4.5 μm, 5 μm, 6 μm, 7 μm, 8 μm, and 9 μm, and most preferably to 10 μm.

[0051] Furthermore, the reason for setting the upper limit of the average length RSm1 of the roughness curve elements in the first unevenness as described above is as follows. In other words, although the average height of each protrusion in the first convexity is determined by the arithmetic mean height Sa1 as described above, each of these values ​​is random.

[0052] Here, as shown in Figure 5(a), if the upper limit of the average length RSm1 of the roughness curve elements in the first unevenness exceeds 100 μm, the distance between adjacent protrusions also increases. On the other hand, the contact surfaces of the pen tip 2a of the input pen 2 and the fingertip 3 that come into contact with the main surface 22a of the glass substrate 22 are curved surfaces that are convex toward the main surface 22a.

[0053] Therefore, the contact surfaces of the pen tip 2a and fingertip 3 of the input pen 2 easily fit into the gaps between the vertices of adjacent protrusions, and the contact area near the contact point P between the pen tip 2a and fingertip 3 of the input pen 2 and the vertices of the protrusions in the first uneven surface inevitably increases. As a result, the frictional force between the pen tip 2a of the input pen 2 or the fingertip 3 and the first uneven surface increases, which may reduce the tactile sensations such as the writing feel with the input pen 2 and the touch feel with the fingertip 3.

[0054] In contrast, as shown in Figure 5(b), in this embodiment, the upper limit of the average length RSm1 of the roughness curve elements in the first unevenness is set to a range of 100 μm or less, so that the distance between adjacent protrusions is also appropriately narrowed.

[0055] Therefore, the contact surfaces of the pen tip 2a of the input pen 2 and the fingertip 3 are less likely to get stuck in the gaps between the vertices of adjacent protrusions, and the contact area near the contact point P between the pen tip 2a of the input pen 2 and the fingertip 3 and the vertices of the protrusions in the first uneven surface is inevitably reduced. As a result, the frictional force between the pen tip 2a of the input pen 2 and the fingertip 3 and the first uneven surface does not increase, and the tactile sensations such as the writing feel with the input pen 2 and the touch feel with the fingertip 3 can be reliably improved.

[0056] The second type of surface contributes to the frictional force between the pen tip 2a or fingertip 3 of the input pen 2 and the main surface 22a of the glass substrate 22. Furthermore, the contribution of the frictional force described above varies depending on the material of the pen tip 2a.

[0057] Specifically, in the case of an elastomer pen tip 2a, the flatter the main surface 22a of the glass substrate 22, the greater the frictional force due to adhesion, making it more difficult for the pen tip 2a to slip against the main surface 22a of the glass substrate 22. Therefore, by adding a second set of irregularities to the main surface 22a of the glass substrate 22, the contact area between the main surface 22a and the pen tip 2a of the input pen 2 can be reduced, making it possible to make the pen tip 2a slide appropriately against the main surface 22a of the glass substrate 22. Furthermore, the elastomer pen tip 2a can be made of thermosetting elastomer or thermoplastic elastomer. Examples of thermosetting elastomers include silicone-based elastomers, while examples of thermoplastic elastomers include styrene-based, olefin-based, polyester-based, polyurethane-based, PVC-based, and polyamide-based elastomers.

[0058] On the other hand, in the case of a pen tip 2a made of a hard material such as polyacetal, the flatter the main surface 22a of the glass substrate 22, the lower the frictional force becomes, and the easier it is for the pen tip 2a to slide against the main surface 22a of the glass substrate 22. Therefore, by adding a second set of irregularities to the main surface 22a of the glass substrate 22, the pen tip 2a of the input pen 2 can more easily grip the main surface 22a, increasing the frictional force and making it moderately difficult for the pen tip 2a to slip against the main surface 22a of the glass substrate 22.

[0059] Furthermore, in the case of a pen tip 2a made of conductive fiber or felt, it exhibits similar behavior to the polyacetal pen tip 2a described above. By adding a second set of irregularities to the main surface 22a of the glass substrate 22, the pen tip 2a of the input pen 2 becomes more likely to catch on the main surface 22a, increasing the frictional force and making it moderately difficult for the pen tip 2a to slip against the main surface 22a of the glass substrate 22.

[0060] Furthermore, the fingertip 3 exhibits similar behavior to the elastomer pen tip 2a described above. By adding a second set of irregularities to the main surface 22a of the glass substrate 22, the contact area of ​​the fingertip 3 with the main surface 22a can be reduced. This prevents excessive roughness, allows the fingertip 3 to slide appropriately, and provides a superior tactile experience.

[0061] In this way, by providing a second set of irregularities on the main surface 22a of the glass substrate 22, it is possible to moderately suppress the slippage of the pen tip 2a of the input pen 2, which is made of various materials (elastomer, polyacetal, conductive fiber, felt), on the main surface 22a, or moderately reduce the slipperiness of the pen tip 2a on the main surface 22a, thereby improving the writing feel of the input pen 2. Furthermore, it can improve the tactile feel provided by the fingertips.

[0062] Incidentally, in the second uneven surface described above, when the cutoff value of the high-pass filter λc2 in a square region with sides of 5 μm is set to 2.5 μm, the interface development area ratio Sdr2 is preferably 3 to 60%.

[0063] Here, the "interface development area ratio Sdr(Sdr2)" is a parameter defined by ISO 25178, similar to the arithmetic mean height Sa mentioned above. It represents how much the actual surface area of ​​the defined region increases relative to the virtual area of ​​the defined region (in this embodiment, a square region with sides of 5 μm) assuming a perfectly flat surface. For example, as shown in Figure 6(a), if the actual surface of the defined region R1 is a perfectly flat surface, the value of the interface development area ratio Sdr will be 0. Furthermore, as shown in Figure 6(b), if the actual surface of the defined region R2 is formed in a bellows-like shape with a 45° inclination angle, the value of the interface development area ratio Sdr is 0.414 (approximately 40%). In other words, the surface area of ​​the defined region R2 is approximately 40% larger than the surface area of ​​the defined region R1.

[0064] In this embodiment, when the unfolded area ratio Sdr2 of the interface on the main surface 22a of the glass substrate 22 is less than 3%, the second unevenness becomes relatively gentle. Therefore, when input operations are performed on the main surface 22a with the input pen 2 and fingertip 3, the pen tip 2a of the input pen 2 and the fingertip 3 become slippery, which may reduce the writing feel with the input pen 2 and the tactile feel with the fingertip 3.

[0065] On the other hand, if the surface area ratio Sdr2 of the interface exceeds 60%, the second surface becomes a relatively undulating surface with significant height differences. Therefore, when input operations are performed on the main surface 22a using the input pen 2 and fingertip 3, the tip 2a of the input pen 2 becomes less slippery, and the fingertip 3 may feel excessive roughness, potentially reducing the writing feel with the input pen 2 and the tactile feel with the fingertip 3.

[0066] For these reasons, as described above, by setting the surface area ratio Sdr2 of the interface within the range of 3 to 60%, the writing feel with the input pen 2 and the tactile feel with the fingertips 3 can be improved.

[0067] Furthermore, in the second unevenness described above, the root mean square slope Sdq2 when the cutoff value of the high-pass filter λc2 in a square region with sides of 5 μm is set to 2.5 μm is preferably between 2 and 80.

[0068] Here, the "root mean square slope Sdq(Sdq2)" mentioned above is a parameter defined by ISO 25178, just like the arithmetic mean height Sa and the interface area ratio Sdr mentioned above. It is a parameter calculated by taking the root mean square of the slope at all points within the defined domain (in this embodiment, a square domain with sides of 5 μm). For example, as shown in Figure 6(a), if the actual surface of the defined region R1 is a perfectly flat surface, the value of the root mean square slope Sdq will be 0. Furthermore, as shown in Figure 6(b), if the actual surface of the defined region R2 is formed in a bellows-like shape with an inclination angle of 45°, the value of the root mean square slope Sdq is 1.

[0069] In this embodiment, when the root mean square slope Sdq2 on the main surface 22a of the glass substrate 22 is less than 2, the tip of the second uneven surface becomes relatively gentle. Therefore, when input operations are performed on the main surface 22a using the input pen 2 and fingertip 3, the pen tip 2a of the input pen 2 and the fingertip 3 become slippery, which may reduce the writing feel with the input pen 2 and the tactile feel with the fingertip 3.

[0070] On the other hand, if the above-mentioned root mean square slope Sdq2 exceeds 80, the tip of the second uneven surface will have a sharply pointed slope. As a result, when input operations are performed on the main surface 22a with the input pen 2 and fingertip 3, the tip 2a of the input pen 2 will become less slippery, and the fingertip 3 will feel excessive roughness, which may reduce the writing feel with the input pen 2 and the tactile feel with the fingertip 3.

[0071] For the foregoing reasons, as described above, by setting the root mean square gradient Sdq2 within the range of 2 to 80, the writing feel with the input pen 2 and the tactile feel with the fingertip 3 can be further improved.

[0072] Furthermore, in the first unevenness, when the cutoff value of the high-pass filter λc1 is 14 μm and the cutoff value of the low-pass filter λs1 is 0.35 μm, the maximum height roughness Rz1 is preferably 25 to 700 nm. In addition, in the second unevenness, when the cutoff value of the high-pass filter λc2 is 2.5 μm in a square region with a side length of 5 μm, the maximum height Sz2 is preferably 10 to 400 nm.

[0073] Furthermore, in the first unevenness, when the cutoff value of the high-pass filter λc1 is 50 μm and the cutoff value of the low-pass filter λs1 is 0.35 μm, the maximum height roughness Rz1 is preferably 25 to 1500 nm.

[0074] Here, the above-mentioned "maximum height roughness Rz (Rz1)" is a parameter defined by JIS B 0601:2001, same as the average length RSm of the roughness curve element described above, and is the sum of the height of the highest peak and the depth of the deepest valley in a profile curve showing the cross-sectional shape of unevenness. Specifically, as shown in FIG. 3(b), the maximum height roughness Rz is the maximum peak Xb (MAX) height Rp to the apex, and maximum valley Yb (MAX) represents the sum of the absolute values of the depth Rv to the apex (Rz=Rp+Rv).

[0075] In addition, the above-mentioned "maximum height Sz (Sz2)" is a parameter defined by ISO 25178, same as the arithmetic mean height Sa described above, and is a parameter obtained by extending the profile curve showing the cross-sectional shape of unevenness to a surface. Specifically, as shown in FIG. 3(a), the maximum height Sz is, with respect to the average plane Z on the main surface 22a of the glass member 22, the maximum peak Xa (MAX) height Sp to the apex, and maximum valley Ya(MAX) This represents the sum of the absolute values ​​of the depth Sv to the vertex (Sz = Sp + Sv).

[0076] By configuring the irregularities on the main surface 22a of the glass substrate 22 in this way, when input operations are performed on the main surface 22a with the input pen 2 and the fingertip 3, the frictional force transmitted to the pen tip 2a of the input pen 2 and the fingertip 3 via the first and second irregularities increases and decreases appropriately, thereby further improving the writing feel with the input pen 2 and the tactile feel with the fingertip 3.

[0077] Furthermore, in the second unevenness described above, it is even more preferable that the maximum peak height Sp2 in a square region with sides of 5 μm, when the cutoff value of the high-pass filter λc2 is 2.5 μm, is 6 to 200 nm.

[0078] Here, the "maximum peak height Sp(Sp2)" mentioned above is a parameter defined by ISO 25178, just like the arithmetic mean height Sa and maximum height Sz mentioned above, and is a parameter that extends the contour curve, which indicates the cross-sectional shape of the unevenness, to a surface. Specifically, as described above, the maximum peak height Sp is the maximum peak Xa relative to the average plane Z on the main surface 22a of the glass member 22. (MAX) This represents the height to the top of the structure.

[0079] If the maximum peak height Sp2 is less than 6 nm, the second unevenness will be a relatively gentle ridge. Therefore, when input operations are performed on the main surface 22a using the input pen 2 and fingertip 3, the pen tip 2a of the input pen 2 and the fingertip 3 may become slippery, potentially reducing the writing feel with the input pen 2 and the tactile feel with the fingertip 3.

[0080] On the other hand, if the maximum peak height Sp2 exceeds 200 nm, the second unevenness becomes a relatively sharp bulge. As a result, when input operations are performed on the main surface 22a using the input pen 2 and fingertip 3, the pen tip 2a of the input pen 2 becomes less slippery, and the fingertip 3 may feel excessive roughness, potentially reducing the writing feel with the input pen 2 and the tactile feel with the fingertip.

[0081] Therefore, by setting the maximum peak height Sp2 of the uneven surface on the main surface 22a of the glass substrate 22 within the range of 6 to 200 nm, the writing feel with the input pen 2 and the tactile feel with the fingertips 3 can be further improved.

[0082] In Figure 1, from the viewpoint of image visibility when viewing the image of the display element 10 through the glass substrate 22, it is preferable that the haze value, which is an index of transparency and represents cloudiness, be less than 10% in the visible light wavelength range (380nm to 780nm). By keeping the haze value of the glass substrate 22 below 10%, the transparency of the glass substrate 22 can be maintained, and the visibility of the display element 10 can be maintained. Furthermore, from the viewpoint of anti-reflection, it is preferable that the haze value of the glass substrate 22 be less than 60% in the visible light wavelength range (380nm to 780nm). The upper limit of the haze value is preferably 60% or less, more preferably 55% or less, 50% or less, 45% or less, or less than 45%. By keeping the haze value of the glass substrate 22 below 60%, a certain level of transparency of the glass substrate 22 can be ensured, and the visibility of the display element 10 can be maintained at a constant level. In this case, the lower limit of the haze value is preferably greater than 10%, and more preferably 15% or more, 20% or more, 25% or more, 30% or more, or 35% or more.

[0083] Furthermore, an anti-reflective coating can be formed on the main surface 22a of the glass substrate 22 to reduce the reflectivity on the side that comes into contact with the input pen 2 or fingertip 3, and / or an anti-fouling coating to prevent fingerprint adhesion and provide water-repellent and oil-repellent properties.

[0084] When the glass substrate 22 is used as a cover member for the input display device 1, the anti-reflective film described above is placed on at least the main surface 22a on the front side of the glass substrate 22 (the side that comes into contact with the input pen 2 or fingertip 3). Furthermore, if there is a gap between the glass substrate 22 and the display element 10, it is preferable to also place an anti-reflective coating on the main surface 22b on the back side (display element 10 side) of the glass substrate 22.

[0085] As the anti-reflective coating, for example, a low refractive index film with a refractive index lower than that of the glass substrate 22, or a dielectric multilayer film in which a low refractive index film with a relatively low refractive index and a high refractive index film with a relatively high refractive index are alternately laminated is used. Anti-reflective coatings can be formed by sputtering or CVD methods, among others.

[0086] When the main surface 22a of the glass substrate 22 has an anti-reflective coating, the surface irregularities of the main surface 22a of the glass substrate 22 are formed such that the irregularities of the surface of the anti-reflective coating fall within the range of the above-described surface roughness (arithmetic mean height Sa1 of the first irregularities, average length RSm1 of the roughness curve elements, and maximum height roughness Rz1, and arithmetic mean height Sa2 of the second irregularities, interface development area ratio Sdr2, root mean square slope Sdq2, maximum height Sz2, and maximum peak height Sp2). Furthermore, if the main surface 22a of the glass substrate 22 has an anti-reflective coating, the irregularities on the main surface 22a of the glass substrate 22 are formed such that the haze value of the glass substrate 22 having the anti-reflective coating falls within the above-mentioned range.

[0087] Furthermore, when measuring the arithmetic mean height Sa1 of the first surface irregularities, the average length RSm1 of the roughness curve elements, and the arithmetic mean height Sa2 of the second surface irregularities after forming the anti-reflective coating, a 10 nm thick Au film is formed, and then these values ​​are measured.

[0088] When the glass substrate 22 is used as a cover member for the input display device 1, the above-mentioned anti-fouling film is placed on at least a portion of the main surface 22a on the front side of the glass substrate 22 (the side that the input pen 2 or fingertip 3 comes into contact with) (in this embodiment, on the entire surface of the main surface 22a). This makes it possible to obtain a glass member laminate 30 comprising an antifouling layer 23 made of an antifouling film and a glass substrate 22.

[0089] The antifouling film preferably contains organosilicon compounds or fluorine-containing polymers that contain silicon in their chains. As a fluorine-containing polymer, for example, a polymer having -Si-O-Si- units in the main chain and a water-repellent functional group containing fluorine in the side chain can be used.

[0090] Furthermore, if the main surface 22a on the front side of the glass substrate 22 has an anti-reflective coating and an anti-fouling coating, the anti-reflective coating is formed on the main surface 22a of the glass substrate 22, and the anti-fouling coating is formed on the anti-reflective coating.

[0091] When the main surface 22a of the glass substrate 22 has an antifouling film, or when the main surface 22a of the glass substrate 22 has both an anti-reflective film and an antifouling film, the surface irregularities of the antifouling film are formed such that the irregularities of the surface of the glass substrate 22 fall within the range of the above-described surface roughness (arithmetic mean height Sa1 of the first irregularities, average length RSm1 of the roughness curve elements, and maximum height roughness Rz1, and arithmetic mean height Sa2 of the second irregularities, interface development area ratio Sdr2, root mean square slope Sdq2, maximum height Sz2, and maximum peak height Sp2). Furthermore, if the main surface 22a of the glass substrate 22 has an antifouling film, or if the main surface 22a of the glass substrate 22 has both an anti-reflective film and an antifouling film, the irregularities on the main surface 22a of the glass substrate 22 are formed such that the haze value of the glass substrate 22 after the formation of the antifouling film, or the haze value of the glass substrate 22 after the formation of both the anti-reflective film and the antifouling film, falls within the range described above.

[0092] [Method for manufacturing glass components] Next, the manufacturing method for the glass component will be explained using Figures 1 and 7. The method for manufacturing a glass member embodied in this embodiment is a method for forming irregularities on at least one main surface 22a of the aforementioned glass substrate 22, and comprises a first forming step S01 and a second forming step S02, which are mainly carried out sequentially over time, as shown in Figure 7.

[0093] The first forming step S01 is a step in which the main surface 22a of the glass substrate 22 is subjected to chemical etching or silica coating, etc., to form the first irregularities described above. Furthermore, the second forming step S02 is a step in which the first irregularities formed in the first forming step S01 are subjected to wet blasting, sandblasting, or the like to form the second irregularities described above.

[0094] The chemical etching process in the first forming step S01 is a hydrofluoric acid etching process in which the main surface 22a of the glass substrate 22 is chemically etched with hydrogen fluoride (HF) gas, hydrofluoric acid, or a mixed solution containing hydrofluoric acid. Furthermore, it is preferable to perform wet blasting or sandblasting prior to chemical etching. By performing chemical etching after wet blasting or sandblasting, the size of the irregularities (first irregularities) formed after chemical etching can be increased.

[0095] In the first forming step S01, if the first surface irregularities are formed by performing a chemical etching process after wet blasting or sandblasting, the formation of the irregularities can be less severe than when the first surface irregularities are formed by wet blasting or sandblasting alone, thus reducing the likelihood of damage such as breakage to the glass substrate 22. Furthermore, if a surface is pre-formed with irregularities by wet blasting or sandblasting before undergoing chemical etching, it becomes easier to obtain a random and highly uniform surface pattern on the main surface 22a of the glass substrate 22.

[0096] Furthermore, when chemical etching is performed after wet blasting or sandblasting, the surface roughness of the first irregularities formed on the main surface 22a of the glass substrate 22 (arithmetic mean height Sa1, average length RSm1 of roughness curve elements, and maximum height roughness Rz1) can be adjusted by various conditions in the wet blasting or sandblasting, such as the particle size distribution of abrasive grains contained in the slurry and the adjustment of the spray pressure when spraying the slurry onto the workpiece, as well as various conditions in the chemical etching, such as the etching time and the concentration of the treatment solution. Thus, when chemical etching is performed after wet blasting or sandblasting, the manufacturing conditions can be precisely modified, making it easier to form the desired uneven surface shape, and consequently improving the controllability of parameters such as the spacing and height of the uneven surfaces.

[0097] The silica coating process involves applying a coating agent containing a matrix precursor such as a silica precursor and a liquid medium for dissolving the matrix precursor to the main surface 22a of the glass substrate 22, and then heating it.

[0098] The wet blasting process in the second forming step S02 is a process in which a slurry made by uniformly stirring abrasive particles composed of solid particles such as alumina with a liquid such as water is sprayed at high speed from a spray nozzle using compressed air onto the main surface 22a of the glass substrate 22a, thereby forming a second set of irregularities on the main surface 22a.

[0099] In wet blasting, when a slurry sprayed at high speed collides with the main surface 22a of the glass substrate 22, the abrasive particles in the slurry scrape, strike, and rub the surface of the main surface 22a, thereby forming a second set of irregularities on the surface of the main surface 22a. In this case, the abrasive particles sprayed onto the main surface 22a of the glass substrate 22, and the fragments of the main surface 22a that are scraped away by the abrasive particles, are washed away by the liquid sprayed together with the abrasive particles, so that fewer particles remain on the main surface 22a of the glass substrate 22.

[0100] Furthermore, the surface roughness of the second unevenness formed on the main surface 22a of the glass substrate 22 by wet blasting (arithmetic mean height Sa2, interface development area ratio Sdr2, root mean square slope Sdq2, maximum height Sz2, and maximum peak height Sp2) can be adjusted mainly by the particle size distribution of the abrasive grains contained in the slurry and the spraying pressure when spraying the slurry onto the main surface 22a of the glass substrate 22.

[0101] In wet blasting, when slurry is sprayed onto the main surface 22a of the glass substrate 22, the abrasive particles are carried to the main surface 22a by the liquid. Compared to dry sandblasting, finer abrasive particles can be used, and the impact when the abrasive particles collide with the main surface 22a of the glass substrate 22 is also reduced, enabling precise machining.

[0102] Thus, in this embodiment, by applying a wet blast treatment to the main surface 22a of the glass substrate 22 which has an appropriate first unevenness, it is possible to easily form an appropriate second unevenness on the main surface 22a, thereby improving the writing feel with the input pen 2 and the tactile feel with the fingertips 3 without impairing the transparency of the glass substrate 22. Furthermore, by applying a dry sandblasting treatment, it is also possible to form a second set of irregularities on the main surface 22a of the glass substrate 22.

[0103] As described above, the method for manufacturing a glass member embodied in this embodiment comprises a first forming step S01 in which hydrofluoric acid etching is performed on the main surface 22a of the glass substrate 22 to form a first surface, and a second forming step S02 in which wet blasting or sandblasting is performed on the first surface formed in the first forming step S01 to form a second surface.

[0104] With this configuration, according to the manufacturing method of the glass member in this embodiment, when input operations are performed on the main surface 22a with the input pen 2, the pen tip 2a of the input pen 2 does not slip excessively, nor does it slip excessively, and a glass substrate 22 with excellent writing feel when using the input pen 2 can be manufactured. Furthermore, when input operations are performed on the main surface 22a with a fingertip 3, no excessive roughness is felt, and a glass substrate 22 with a superior tactile feel to the fingertip 3 can be manufactured.

[0105] [Alternative Embodiment] Incidentally, in Figure 8, the glass substrate 22 in this embodiment, or the glass member laminate 30 comprising the glass substrate 22 and the anti-fouling layer 23, can be used as an exterior glass member 100 that constitutes the exterior of an electronic device, mainly because it improves the feel when touched by the fingertips 3. Specifically, the exterior glass member 100 can be used as the housing 101 or door body 102 of the electronic device.

[0106] Examples of electronic devices having the above-mentioned housing 101 include, as shown in Figure 8(a), communication terminals such as mobile phones, smartphones, PDAs (Personal Data Assistance), PNDs (Portable Navigation Devices), and portable car navigation systems; broadcast receivers such as portable radios, portable televisions, and one-segment receivers; and information terminals such as digital cameras, video cameras, portable music players, sound recorders, portable DVD players, portable game consoles, laptop computers, tablet PCs, electronic dictionaries, electronic organizers, e-book readers, portable printers, and portable scanners.

[0107] Furthermore, examples of electronic devices having the above-described housing 101 and door body 102 include household electronic devices such as electric refrigerators, electric washing machines, rice cookers, induction cooktops, electric vacuum cleaners, oven ranges, microwave ovens, oven toasters, air purifiers, dishwashers, electric kettles, and electric pots, as shown in Figure 8(b).

[0108] Furthermore, as shown in Figure 8(c), it is also possible to use an exterior glass member 100 on the outer surface 103a of the container 103 for the purpose of making it less slippery and improving the feel when held in the hand. [Examples]

[0109] Next, an embodiment of a glass substrate 22 in which two types of irregularities, large and small, consisting of a first irregularity and a second irregularity, are formed on one of the main surfaces 22a, will be described in detail with reference to Figure 1, Tables A1 to A5, and Tables 1 to 8. The following examples of the glass substrate 22 are merely examples of glass members according to the present invention and are not limited thereto.

[0110] [Sample preparation] First, samples 1-19, 26, and 27 were prepared as examples of glass substrate 22, and samples 20-25 were prepared as comparative examples to these examples. For samples 1 to 27, alkali-containing aluminosilicate glass with a thickness of 0.55 mm was used as the material for the glass substrate 22.

[0111] The manufacturing conditions for each of the glass substrates 22 are shown in Tables A1 to A5.

[0112] [Table A1]

[0113] [Table A2]

[0114] [Table A3]

[0115] [Table A4]

[0116] [Table A5]

[0117] For each glass substrate 22 of the examples 1 to 19, a first surface (hereinafter referred to as "surface A") was created by a first forming step S01 (see Figure 7), which consists of two steps (the first step and the second step described later), as shown below. Then, a second surface (hereinafter referred to as "surface B") was formed on surface A by a second forming step S02, which consists of one step (the third step described later), thereby creating a surface consisting of surface A and surface B.

[0118] [Formation of uneven surface A] The uneven surface A was formed by a first process and a second process, which were carried out sequentially over time. In the first step, a slurry was prepared by uniformly stirring 10 to 13 vol% of abrasive particles made of alumina with a particle size of #320 to #8000 with pure water. A wet blasting treatment was then performed on the entire main surface 22a of one of the glass substrates 22, scanning it while moving a nozzle at a processing speed of 5 to 10 mm / s, and spraying the prepared slurry from the nozzle using air at a processing pressure of 0.1 to 0.25 MPa to form preliminary irregularities Aa. Furthermore, in the second step, the glass substrate 22, on which preliminary irregularities Aa have been formed on the main surface 22a by the first step, is immersed in an etching solution consisting of 2-5 wt% hydrofluoric acid, 0-50 wt% sulfuric acid, and 48-95 wt% pure water, and left at a liquid temperature of 30°C for 5-30 minutes to perform an etching treatment, thereby forming the final irregularities A from the preliminary irregularities Aa.

[0119] Furthermore, in the first step, by increasing the particle size of the alumina, the arithmetic mean height Sa1 of the final formed surface A, the average length RSm1 of the roughness curve elements, and the maximum height roughness Rz1 can be increased. Furthermore, by increasing the processing pressure of the air ejected from the nozzle, the values ​​of the arithmetic mean height Sa1 of the final formed surface A, the average length RSm1 of the roughness curve elements, and the maximum height roughness Rz1 can be increased. On the other hand, by increasing the nozzle processing speed, the arithmetic mean height Sa1, the average length RSm1 of the roughness curve elements, and the maximum height roughness Rz1 of the final formed surface A can be reduced.

[0120] Furthermore, in the second step, increasing the concentration of sulfuric acid in the etching solution can reduce the arithmetic mean height Sa1 of the final formed surface irregularities A. On the other hand, by increasing the waiting time during the etching process, the average length RSm1 of the roughness curve elements of the final formed surface A can be increased.

[0121] [Formation of uneven surface B] The uneven surface B was formed by the third step. In the third step, a wet blasting treatment was performed on the main surface 22a having irregularities A formed in the first and second steps described above. This treatment involved uniformly stirring a slurry prepared by alumina abrasive grains with a particle size of #2000 to #8000 and pure water, scanning the surface with a nozzle at a processing speed of 0.1 to 10 mm / s, and spraying the prepared slurry from the nozzle using air at a processing pressure of 0.1 to 0.25 MPa, thereby forming irregularities B on the irregularities A. Furthermore, the abrasive grains used had a polygonal shape.

[0122] Furthermore, in the third step, by increasing the particle size of the alumina, the values ​​of the arithmetic mean height Sa2 of the final formed surface B, the interface area ratio Sdr2, the root mean square slope Sdq2, the maximum height Sz2, and the maximum peak height Sp2 can be increased. Furthermore, by increasing the processing pressure of the air ejected from the nozzle, the values ​​of the arithmetic mean height Sa2 of the final formed surface B, the interface development area ratio Sdr2, the root mean square slope Sdq2, the maximum height Sz2, and the maximum peak height Sp2 can be increased. On the other hand, by increasing the nozzle processing speed, the values ​​of the arithmetic mean height Sa2 of the final formed surface B, the interface development area ratio Sdr2, the root mean square slope Sdq2, the maximum height Sz2, and the maximum peak height Sp2 can be reduced.

[0123] In the case of the glass substrate 22 of the comparative example sample 20, one of the main surfaces 22a has not been treated. In other words, the glass substrate 22 of sample 20 is untreated.

[0124] For the glass substrates 22 of comparative examples 21 to 23, only the irregularities formed by the first and second steps were created on one main surface 22a in the same manner as described for samples 1 to 19. In other words, in samples 21 to 23, only the irregularities A are formed on the main surface 22a of the glass substrate 22.

[0125] For the glass substrate 22 of the comparative example sample 24, only the irregularities formed by the third step were created on one of the main surfaces 22a using the same method as described for samples 1 to 15. In other words, in sample 24, only the irregularities B are formed on the main surface 22a of the glass substrate 22.

[0126] For the glass substrate 22 of the comparative example sample 25, a liquid containing SiO2 was sprayed onto one of the main surfaces 22a, and the applied liquid containing SiO2 was dried to form an SiO2 coating film on the main surface 22a. In other words, in sample 25, an SiO2 coating was applied to the main surface 22a of the glass substrate 22.

[0127] For the glass substrates 22 of the example samples 26-27, a resin coating layer with through holes spaced 50 μm apart was applied to one main surface 22a. By performing wet blasting from above, uneven surfaces A and B were simultaneously formed by utilizing the difference in processing rates between the resin-coated and non-resin-coated areas. After processing was completed, the resin coating layer was removed with acetone.

[0128] [Surface roughness measurement] Next, the surface roughness of the main surface 22a was measured for each of the glass substrates 22 of the samples 1 to 27 described above. Surface roughness measurements were performed on the main surface 22a having both surface irregularities A and B for samples 1 to 19, on one of the main surfaces 22a for sample 20, on the main surface 22a having only surface irregularities A for samples 21 to 23, on the main surface 22a having only surface irregularities B for sample 24, on the main surface coated with SiO2 for sample 25, and on the main surface 22a having both surface irregularities A and B for samples 26 to 27.

[0129] The parameters to be measured for surface roughness A were the arithmetic mean height Sa1, the average length RSm1 of the roughness curve elements, and the maximum height roughness Rz1. These parameters were measured using a white light interference microscope. For the white light interference microscope mentioned above, we decided to use the New View 7300 white light interference microscope manufactured by Zygo.

[0130] <Measurement A-1> For the measurement of surface irregularities A, a 50x objective lens and a 2x zoom lens were used, and the measurement was performed on a 74 × 55 μm area with a camera resolution of 640 × 480 pixels and 10 cumulative measurements. Furthermore, when measuring the arithmetic mean height Sa1, the average length RSm1 of the roughness curve elements, and the maximum height roughness Rz1 in the uneven surface A, the cutoff value of the high-pass filter λc1 was set to 14 μm, and the cutoff value of the low-pass filter λs1 was set to 0.35 μm.

[0131] <Measurement A-2> Furthermore, the measurement area was carried out in the same manner as described above, with the cutoff value of the high-pass filter λc1 set to 50 μm and the cutoff value of the low-pass filter λs1 set to 0.35 μm, and the arithmetic mean height Sa1, the average length RSm1 of the roughness curve elements, and the maximum height roughness Rz1 at the uneven surface A were measured.

[0132] On the other hand, the parameters to be measured for surface roughness in uneven surface B were the arithmetic mean height Sa2, the interface development area ratio Sdr2, the root mean square slope Sdq2, the maximum height Sz2, and the maximum peak height Sp2, and these parameters were to be measured using an atomic force microscope (AFM). Furthermore, the atomic force microscopes used were the Dimension Icon (SPM unit) and Nano Scope V (Controller unit) manufactured by Bruker, and measurements were performed in accordance with ISO 25178.

[0133] For the measurement of surface irregularities B, tapping mode was used, and the scan rate was set to 1 Hz and the number of acquired data points to 512 × 512 for a measurement area of ​​5 × 5 μm. Subsequently, based on the acquired data, we decided to measure each of the surface roughness parameters mentioned above within a square area with sides of 5 μm. Furthermore, the cutoff value of the high-pass filter λc2 was set to 2.5 μm, and the analysis was performed.

[0134] [Surface roughness measurement results] The surface roughness measurement results for samples 1 to 27, measured using the measurement methods described above, are shown in Tables 1 to 8.

[0135] [Table 1]

[0136] [Table 2]

[0137] [Table 3]

[0138] [Table 4]

[0139] [Table 5]

[0140] [Table 6]

[0141] [Table 7]

[0142] [Table 8]

[0143] <Measurement A-1> As shown in Tables 1 to 8, for the examples of samples 1 to 19, 26, and 27, the arithmetic mean height Sa1 at surface A was within the range of 4.6 to 164.3 nm, the maximum height roughness Rz1 was within the range of 10 to 548.4 nm, and the average length RSm1 of the roughness curve elements was within the range of 5.5 to 50 μm.

[0144] In contrast, in comparative examples 20-25, the untreated sample 20 had an arithmetic mean height Sa1 at surface A of 0.1 nm, a maximum height roughness Rz1 of 0.8 nm, and an average length RSm1 of roughness curve elements of 0.9 μm. These values ​​were all considerably smaller than those of the example samples 1-19.

[0145] Furthermore, for samples 21-23, which were given only surface irregularities A, the arithmetic mean height Sa1 of surface irregularities A was within the range of 10.7-36.7 nm, the maximum height roughness Rz1 was within the range of 51.0-211.5 nm, and the average length RSm1 of the roughness curve elements was within the range of 4.7-10.8 μm.

[0146] Furthermore, for sample 24, which was given only surface irregularities B, the arithmetic mean height Sa1 obtained by the measurement method of surface irregularities A described above was 2.3 nm, the maximum height roughness Rz1 was 24.8 nm, and the average length RSm1 of the roughness curve elements was 1.9 μm.

[0147] Furthermore, for sample 25 coated with SiO2, the arithmetic mean height Sa1 at surface A was 71.6 nm, the maximum height roughness Rz1 was 595.7 nm, and the average length RSm1 of the roughness curve elements was 6.5 μm.

[0148] <Measurement A-2> As shown in Tables 1 to 8, for the examples of samples 1 to 19, 26, and 27, the arithmetic mean height Sa1 at surface A was within the range of 4.6 to 226.1 nm, the maximum height roughness Rz1 was within the range of 10 to 1174.2 nm, and the average length RSm1 of the roughness curve elements was within the range of 5.0 to 50 μm.

[0149] In contrast, in comparative examples 20-25, the untreated sample 20 had an arithmetic mean height Sa1 at surface A of 0.1 nm, a maximum height roughness Rz1 of 0.9 nm, and an average length RSm1 of roughness curve elements of 1.4 μm. These values ​​were all considerably smaller than those of the example samples 1-19.

[0150] Furthermore, for samples 21-23, which were given only surface irregularities A, the arithmetic mean height Sa1 of surface irregularities A was within the range of 14.0-38.0 nm, the maximum height roughness Rz1 was within the range of 78.8-236.5 nm, and the average length RSm1 of the roughness curve elements was within the range of 5.1-9.2 μm.

[0151] Furthermore, for sample 24, which was given only surface irregularities B, the arithmetic mean height Sa1 obtained by the measurement method of surface irregularities A described above was 2.8 nm, the maximum height roughness Rz1 was 26.7 nm, and the average length RSm1 of the roughness curve elements was 1.9 μm.

[0152] Furthermore, for sample 25 coated with SiO2, the arithmetic mean height Sa1 at surface A was 118.3 nm, the maximum height roughness Rz1 was 716.3 nm, and the average length RSm1 of the roughness curve elements was 11.6 μm.

[0153] On the other hand, as shown in Tables 1 to 8, for the examples, samples 1 to 19, 26, and 27, the arithmetic mean height Sa2 at the uneven surface B was within the range of 4.9 to 30.7 nm. In contrast, in comparative examples 20-25, the arithmetic mean height Sa2 of untreated sample 20 was 0.2 nm, the arithmetic mean height Sa2 of samples 21-23 having only surface irregularities A was in the range of 0.5-0.6 nm, the arithmetic mean height Sa2 of sample 24 having only surface irregularities B was 4.7 nm, and the arithmetic mean height Sa2 of sample 25 with SiO2 coating was 0.6 nm.

[0154] Furthermore, for the examples, samples 1-19, 26, and 27, the maximum height Sz2 in the uneven surface B was within the range of 87.5 to 283.0 nm. In contrast, in comparative examples 20-25, the maximum height Sz2 of untreated sample 20 was 1.4 nm, the maximum height Sz2 of samples 21-23 having only surface irregularities A was in the range of 6.4-8.2 nm, and the maximum height Sz2 of sample 25 with SiO2 coating was 7.6 nm. All of these values ​​were considerably smaller than those of examples 1-19. Furthermore, the arithmetic mean height Sz2 of sample 24, which only had surface irregularities B, was 79.5 nm.

[0155] Furthermore, for the examples of samples 1-19, 26, and 27, the maximum peak height Sp2 in the uneven surface B was within the range of 28.1 to 106.0 nm. In contrast, in comparative examples 20-25, the maximum peak height Sp2 of untreated sample 20 was 0.7 nm, the maximum peak height Sp2 of samples 21-23 having only surface irregularities A was in the range of 3.6-5.1 nm, and the maximum peak height Sp2 of SiO2-coated sample 25 was 4.8 nm. These values ​​were all considerably smaller than those of examples 1-19. The maximum peak height Sp2 of sample 24 having only surface irregularities B was 34.5 nm.

[0156] Furthermore, for the examples of samples 1-19, 26, and 27, the root mean square slope Sdq2 in the uneven surface B was within the range of 16.8 to 43.7. In contrast, in comparative examples 20-27, the root mean square slope Sdq2 for untreated sample 20 was 0.5, the root mean square slope Sdq2 for samples 21-23 having only surface irregularities A was in the range of 2.2-3.3, the root mean square slope Sdq2 for sample 24 having only surface irregularities B was 15.7, and the root mean square slope Sdq2 for SiO2 coated sample 25 was 2.8. All of these values ​​were small compared to the examples 1-19.

[0157] Furthermore, for the examples, samples 1-19, 26, and 27, the Sdr2 ratio of the developed area of ​​the interface at uneven surface B was within the range of 4.4 to 37.8. In contrast, in comparative examples 20 to 25, the Sdr2 of the interface area ratio for untreated sample 20 was 0.005, the Sdr2 of the interface area ratio for samples 21 to 23 having only surface irregularities A was in the range of 0.1 to 0.2, the Sdr2 of the interface area ratio for sample 24 having only surface irregularities B was 4.2, and the Sdr2 of the interface area ratio for sample 25 with SiO2 coating was 0.2. All of these values ​​were small compared to the examples 1 to 15.

[0158] [Haze measurement] Next, haze measurements were performed on samples 1 to 27. The haze measurements were taken using a Shimadzu UV-Vis-Infrared analytical photometer (UV-3100PC) in accordance with JIS K7361-1-1997.

[0159] [Hayes' evaluation results] The haze measurement results for samples 1 to 27 are shown in Tables 1 to 4, as described above.

[0160] As shown in Tables 1 to 8, the haze values ​​for the examples, samples 1 to 19, 26, and 27, were within the range of 1.2 to 49.8. In contrast, among the comparative examples, samples 20 to 25, the haze of untreated sample 20 was extremely low and unmeasurable, the haze values ​​of samples 21 to 23, which only had surface irregularities A, were in the range of 0.9 to 9.6, the haze value of sample 24, which only had surface irregularities B, was 0.4, and the haze value of sample 25, which was coated with SiO2, was 47.6.

[0161] [Sensory evaluation of writing feel] Next, for samples 1 to 27, the writing feel when the character "あ" was entered on the main surface 22a of each glass substrate 22 using the input pen 2 was evaluated by sensory testing. For the evaluation method, a Wacom replacement nib (product name: ACK-20004, nib diameter: 1.4 mm) with an elastomer nib 2a was fitted into a jig made with a 3D printer, and attached to the casing of a Mitsubishi Pencil ballpoint pen (product name: JETSTREAM). This was used as the input pen 2, and the writing feel on the main surface 22a of the glass substrate 22 was evaluated.

[0162] For the evaluation, we decided to use a four-level evaluation criterion consisting of four items: "Excellent writing feel: ◎", "Relatively good writing feel: ○", "Somewhat poor writing feel: △", and "Poor writing feel: ×".

[0163] [Evaluation results of writing comfort] The results of the writing feel evaluation conducted for samples 1 to 27 are shown in Tables 1 to 8, as described above.

[0164] As shown in Tables 1 to 8, for the examples, samples 1 to 19, 26, and 27, the input pen 2 having an elastomer pen tip 2a received an evaluation of "Good writing feel: ◎" or "Relatively good writing feel: ○" for its writing feel.

[0165] In contrast, for comparative examples 20-25, the evaluation result for untreated sample 20 was "Poor writing feel: ×", the evaluation result for samples 21-23 having only uneven surface A was "Poor writing feel: ×", the evaluation result for sample 24 having only uneven surface B was "Somewhat poor writing feel: △", and the evaluation result for sample 25 with SiO2 coating was "Poor writing feel: ×". In all cases, a satisfactory evaluation result could not be obtained.

[0166] [Sensory evaluation of tactile feel] Next, the tactile feel of samples 1-27 was evaluated by sensory assessment using fingertip 3. The evaluation method involved placing each glass substrate 22 on a table with its main surface 22a facing upwards, and then evaluating the tactile feel when sliding the tip of an index finger 3 across the main surface 22a multiple times. Furthermore, in order to maintain a consistent condition of the fingertip 3 when evaluating each sample, the index finger was wiped with ethanol before evaluating each sample, and the evaluation was started after 1 minute.

[0167] For the evaluation, we decided to use a four-level evaluation criterion consisting of four items: "Good feel: ◎", "Relatively good feel: ○", "Somewhat poor feel: △", and "Poor feel: ×".

[0168] [Results of evaluation of tactile feel] The results of the tactile evaluation conducted on samples 1 to 27 are shown in Tables 1 to 8, as described above.

[0169] As shown in Tables 1 to 8, for the examples, samples 1 to 19, 26, and 27 received an evaluation of "Good feel: ◎" or "Relatively good feel: ○" based on the tactile feel with the fingertip 3 of the index finger.

[0170] In contrast, for the comparative examples, samples 20 to 25, the evaluation result for untreated sample 20 was "Poor texture: ×", the evaluation result for samples 21 to 23 having only surface A was "Poor texture: ×", the evaluation result for sample 24 having only surface B was "Somewhat poor texture: △", and the evaluation result for sample 25 with SiO2 coating was "Poor texture: ×". In all cases, a satisfactory evaluation result could not be obtained.

[0171] [Sensory evaluation of visibility] Next, the visibility of samples 1 to 27 was evaluated by sensory assessment. For the evaluation method, each glass substrate 22 was placed on an Apple iPad Pro with the monitor power turned on, with the main surface 22a facing upwards, and the ability to clearly see the characters and images displayed on the screen was evaluated using the following criteria.

[0172] For the evaluation, we decided to use a four-level evaluation criterion consisting of four items: "Excellent visibility: ◎", "Relatively good visibility: ○", "Somewhat poor visibility: △", and "Poor visibility: ×".

[0173] [Visibility evaluation results] The results of the visibility evaluation conducted for samples 1 to 27 are shown in Tables 1 to 8, as described above.

[0174] As shown in Tables 1 to 8, the examples, samples 1 to 19, 26, and 27, received a "Good Visibility: ◎" rating for visibility.

[0175] In contrast, for comparative examples 20-25, the evaluation result for untreated sample 20 was "Good visibility: ◎", the evaluation result for samples 21-23 having only surface irregularities A was "Good visibility: ◎", the evaluation result for sample 24 having only surface irregularities B was "Good visibility: ◎", and the evaluation result for sample 25 with SiO2 coating was "Somewhat poor visibility: △".

[0176] [Sensory evaluation of reflections] Next, the reflections of samples 1 to 27 were evaluated by sensory assessment. The evaluation method involved placing each glass substrate 22 on an Apple iPad Pro with its main surface 22a facing upwards in a room with fluorescent lights installed on the ceiling. With the iPad Pro's monitor powered on, the evaluation was conducted using the following evaluation items to determine whether the reflection of the evaluator's own image on the glass substrate 22 due to light reflection interfered with the observation of the image displayed on the iPad Pro screen, viewed from a vertical direction on the glass substrate 22.

[0177] For the evaluation, we decided to use a four-level evaluation criterion consisting of four items: "Reflections are not noticeable at all: ◎", "Reflections are visible but not noticeable: ○", "Reflections are somewhat noticeable: △", and "Reflections are noticeable: ×".

[0178] [Evaluation results of reflections] The results of the reflection evaluation performed on samples 1 to 27 are shown in Tables 1 to 8, as described above.

[0179] As shown in Tables 1 to 8, for the example samples 1 to 19, 26, and 27, various evaluations were obtained regarding reflections, including "reflection is not noticeable at all: ◎", "reflection is visible but not noticeable: ○", "reflection is somewhat noticeable: △", and "reflection is noticeable: ×".

[0180] Furthermore, in comparative examples 20-25, the evaluation result for untreated sample 20 was "Reflection is noticeable: ×", the evaluation results for samples 21-23 having only surface irregularities A were "Reflection is visible but not noticeable: ○" or "Reflection is noticeable: ×", the evaluation result for sample 24 having only surface irregularities B was "Reflection is noticeable: ×", and the evaluation result for sample 25 with SiO2 coating was "Reflection is not noticeable at all: ◎".

[0181] [Overall evaluation of each sample] From the results above, as shown in Tables 1 to 8, for the examples of samples 1 to 19, 26, and 27, the appropriate irregularities A (i.e., the first irregularities described above) and irregularities B (i.e., the second irregularities described above) formed on the main surface 22a to which the pen tip 2a of the input pen 2 makes contact resulted in a combination of appropriate increases and decreases in frictional force between the pen tip 2a and the main surface 22a, and a good evaluation result regarding writing comfort was obtained.

[0182] Furthermore, in the examples of samples 1-19, 26, and 27, the appropriate irregularities A (first irregularity) and irregularities B (second irregularity) formed on the main surface 22a to which the fingertip 3 makes contact reduced the contact area between the fingertip 3 and the main surface 22a, making the fingertip 3 easier to slide, and resulting in a favorable evaluation of the tactile feel.

[0183] Furthermore, in the case of samples 1-19, 26, and 27, which are examples, the appropriate haze values ​​were achieved due to the appropriate irregularities A (first irregularity) and irregularities B (second irregularity) formed on the main surface 22a, so that the image seen through the surface maintained sufficient visibility. On the other hand, the evaluation results of reflections varied from good to poor, so it is desirable to use them appropriately according to the installation environment and the user's needs.

[0184] On the other hand, for sample 20, which was an untreated comparative example, the irregularities formed on the main surface 22a that the pen tip 2a of the input pen 2 contacts were small, and the elastomer pen tip 2a became very slippery, resulting in a poor evaluation of the writing feel. Furthermore, in the case of sample 20, which was an untreated comparative example, the unevenness formed on the main surface 22a that the fingertip 3 contacts was small, making it very difficult for the fingertip 3 to slip, resulting in a poor evaluation of the tactile feel.

[0185] Furthermore, in the case of sample 20, which was an untreated comparative example, the visibility was good because the irregularities formed on the main surface 22a were small, but the evaluation results for reflections were poor.

[0186] For comparative examples 21-23, which only had the first type of unevenness A, the unevenness formed on the main surface 22a to which the pen tip 2a of the input pen 2 made contact was large, making the elastomer pen tip 2a very difficult to grip, resulting in poor evaluation of writing comfort. Furthermore, in the comparative examples 21-23, which only had the uneven surface A (first uneven surface), the unevenness formed on the main surface 22a that the fingertip 3 contacts was large, and the reduction in the contact area between the fingertip 3 and the main surface 22a of the glass substrate 22 was insufficient. As a result, the fingertip 3 became very difficult to slip on, and the evaluation results for tactile feel were poor.

[0187] For comparative examples 21-23, which only had surface irregularities A (first irregularities), the irregularities formed on the main surface 22a were large and visibility was good, but the reflection evaluation results were good or bad.

[0188] In the case of sample 24, a comparative example having only the irregularities B (second irregularities), the irregularities formed on the main surface 22a to which the pen tip 2a of the input pen 2 makes contact were small, making the elastomer pen tip 2a slightly slippery. However, because there were no irregularities A (first irregularities) and the reduction in contact area was insufficient, the writing feel was not sufficiently improved, and the evaluation result was poor. Furthermore, in the case of sample 24, a comparative example having only the irregularities B (second irregularities), the irregularities formed on the main surface 22a that the fingertip 3 contacts are small, making it slightly slippery between the fingertip 3 and the main surface 22a of the glass substrate 22. However, because there are no irregularities A (first irregularities) and the reduction in contact area is insufficient, the fingertip 3 is still not slippery, and the evaluation result for writing comfort was poor.

[0189] For comparative example sample 24, which only had surface irregularities B (second irregularities), surface irregularities A (first irregularities) were absent, resulting in good visibility and poor reflection evaluation.

[0190] In the case of sample 25, a comparative example with an SiO2 coating, the large irregularities formed on the main surface 22a to which the pen tip 2a of the input pen 2 makes contact resulted in a poor evaluation of the writing feel, as the elastomer pen tip 2a became very difficult to grip. Furthermore, in the case of sample 25, a comparative example with an SiO2 coating, the irregularities formed on the main surface 22a that the fingertip 3 contacts were large, and the reduction in the contact area between the fingertip 3 and the main surface 22a of the glass substrate 22 was insufficient. As a result, the fingertip 3 became very slippery, and the evaluation of the tactile feel was poor.

[0191] In the case of sample 25, a comparative example with an SiO2 coating, the surface irregularities formed on the main surface 22a were large, resulting in poor visibility, while the reflection evaluation results were good.

[0192] Although embodiments of the present application have been described above, the present application is not limited in any way to these embodiments, but is merely illustrative. It is of course possible to implement the present application in various other forms without departing from the spirit of the present application, and the scope of the present application is indicated by the claims, and further includes all modifications within the meaning and scope of equivalents as described in the claims. [Explanation of Symbols]

[0193] 10 Display elements (display devices) 20 Input devices 21. Digitizer circuit (detection circuit) 22 Glass substrate (glass component) 22a Main surface 23 Anti-fouling layer 30 Glass component laminate 100 Exterior glass components 101 cabinets 102 Door Body 103 Container S01 First Formation Project S02 Second Formation Project

Claims

1. A glass member having a main surface with irregularities, The aforementioned irregularities are The first surface has an arithmetic mean height Sa1 of 2 to 500 nm when the cutoff value of the high-pass filter λc1 is 14 μm and the cutoff value of the low-pass filter λs1 is 0.35 μm, and the average length RSm1 of the roughness curve elements is 2 to 100 μm. In a square region with sides of 5 μm, when the cutoff value of the high-pass filter λc2 is 2.5 μm, it has a second type of surface with an arithmetic mean height Sa2 of 0.7 to 50 nm. A glass component characterized by the following features.

2. In the first unevenness, When the cutoff value of the high-pass filter λc1 is 14 μm and the cutoff value of the low-pass filter λs1 is 0.35 μm, the maximum height roughness Rz1 is 25 to 700 nm. The glass member according to claim 1, characterized in that

3. A glass member having a main surface with irregularities, The aforementioned irregularities are The first surface has an arithmetic mean height Sa1 of 2 to 500 nm when the cutoff value of the high-pass filter λc1 is 50 μm and the cutoff value of the low-pass filter λs1 is 0.35 μm, and the average length RSm1 of the roughness curve elements is 2 to 100 μm. In a square region with sides of 5 μm, when the cutoff value of the high-pass filter λc2 is 2.5 μm, it has a second type of surface with an arithmetic mean height Sa2 of 0.7 to 50 nm. A glass component characterized by the following features.

4. In the first unevenness, When the cutoff value of the high-pass filter λc1 is set to 50 μm and the cutoff value of the low-pass filter λs1 is set to 0.35 μm, the maximum height roughness Rz1 is 25 to 1500 nm. The glass member according to claim 2, characterized in that

5. In the second unevenness, In a square region with sides of 5 μm, when the cutoff value of the high-pass filter λc² is 2.5 μm, the interface area ratio Sdr² is 3-60%. A glass member according to any one of claims 1 to 4, characterized in that...

6. In the second unevenness, In a square region with sides of 5 μm, when the cutoff value of the high-pass filter λc² is 2.5 μm, the root mean square slope Sdq² is between 2 and 80. A glass member according to any one of claims 1 to 4, characterized in that...

7. In the second unevenness, In a square region with sides of 5 μm, when the cutoff value of the high-pass filter λc² is 2.5 μm, the maximum height Sz² is 10 to 400 nm. A glass member according to any one of claims 1 to 4, characterized in that...

8. In the second unevenness, In a square region with sides of 5 μm, when the cutoff value of the high-pass filter λc² is 2.5 μm, the maximum peak height Sp² is 6 to 200 nm. A glass member according to any one of claims 1 to 4, characterized in that...

9. A glass member according to any one of claims 1 to 4 or 6, The glass member comprises an anti-fouling layer provided on at least a portion of the main surface, A glass member laminate characterized by the following features.

10. A glass member as described in any one of claims 1 to 4 or 6, It includes a detection circuit that detects the input position. An input device characterized by the following features.

11. The system comprises an input device according to claim 10 and a display device, An input display device characterized by the following features.

12. A glass member made according to any one of claims 1 to 4 or 6. An exterior glass component characterized by the following features.

13. The exterior glass member is provided as described in claim 12. A housing characterized by the following features.

14. The exterior glass member is provided as described in claim 12. A door body characterized by the following features.

15. The exterior glass member is provided as described in claim 12. A container characterized by the following features.

16. A manufacturing method for producing a glass member according to any one of claims 1 to 4 or 6, A first forming step involves applying hydrofluoric acid etching to the main surface of the glass member to form the first irregularities, The process comprises a second forming step of applying a wet blasting or sandblasting treatment to the first irregularities formed by the first forming step to form the second irregularities, A method for manufacturing a glass component, characterized by the above.

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