Capacitive touch panel

Abstract

A capacitive touch panel is provided, which is a touch panel having a sensor portion formed in a rhombus pattern and having a structure in which the sensor portion is inconspicuous. In the touch panel, a glass substrate having a touch surface, an X-axis sensor portion formed by arranging a plurality of rhombus-shaped X-axis grids (10A) and (10B) in the X-axis direction in parallel and arranged in a plurality of rows, a Y-axis sensor portion formed by arranging a plurality of Y-axis grids (14A) and (14B) in the Y-axis direction in parallel and arranged in a plurality of rows, and an insulating layer arranged between the X-axis sensor portion and the Y-axis sensor portion are stacked, the X-axis grid and the Y-axis grid do not overlap in a top view observed from the touch surface, a gap (17) is formed between a frame (10a) of the X-axis grid and a frame (14a) of the Y-axis grid, and a protrusion (12) extending from the frame (10a) of the X-axis grid (10A) and (10B) in parallel with the grid side of the fine grid is provided in the gap (17).

Description

Technical Field

[0001] The present invention relates to a capacitive touch panel that detects an arbitrary position of a user's finger or the like approaching a touch surface (XY plane) by changes in capacitance, and more particularly to a capacitive touch panel in which sensor electrodes are provided on a glass substrate. Background Art

[0002] In home appliances, AV equipment, PC / OA equipment, industrial machinery and other electronic devices, projected capacitive touch panels are used as one of the input means for each device. In the projected capacitive type, there are multiple sensor electrodes arranged in a predetermined pattern in the X-axis direction and the Y-axis direction.

[0003] As a specific structure of a conventional touch panel, the following structure is known: a sensor electrode for inspection in the X-axis direction is formed on one glass substrate, and a sensor electrode for inspection in the Y-axis direction is formed on the other glass substrate, and the sensor electrode for the X-axis and the sensor electrode for the Y-axis are sandwiched between the two glass substrates and face each other. As a pattern of the sensor electrode, a pattern in which rhombus-shaped grids are arranged in the vertical direction (Y) and the horizontal direction (X) (hereinafter also referred to as a rhombus pattern) is known (see Patent Document 1).

[0004] based on Figure 7 and Figure 8 The structure of a conventional rhombus-patterned sensor electrode is described below. Figure 7 FIG. 2 shows an enlarged view of the sensor electrodes when the touch panel is viewed from the touch surface (top view). Figure 7 As shown in FIG. 1 , a plurality of X-axis grids 21 are arranged in the X-axis direction, and a plurality of Y-axis grids 22 are arranged in the Y-axis direction. Each grid 21 and 22 is formed by a finer grid. The fine grid is formed by a metal thin film. Figure 7 In the figure, for the sake of convenience, the Y-axis grid 22 is shown with oblique lines. In this touch panel, since the X-axis grid 21 and the Y-axis grid 22 need to be electrically separated, they need to be separated to a certain extent. Figure 7 As shown, the X-axis grid 21 and the Y-axis grid 22 do not overlap in the stacking direction, and a gap 23 is provided between the X-axis grid 21 and the Y-axis grid 22. Since the gap 23 is not provided with a metal thin film, the transmittance is higher than that of each grid 21, 22.

[0005] exist Figure 8 (a) shows Figure 7 The enlarged view of the D part of Figure 8 (b) shows Figure 8 (a) The X-axis sensor section, Figure 8 The Y-axis sensor portion is shown in (c). Figure 8As shown in (b), the X-axis grids 21A and 21B adjacent to each other in the X-axis direction are connected by a connecting portion 24 extending parallel to the X-axis direction. Figure 8 As shown in (c), the Y-axis grids 22A and 22B adjacent to each other in the Y-axis direction are connected by a connecting portion 25 extending parallel to the Y-axis direction. Figure 8 As shown in (a), the connection part 24 and the connection part 25 are connected and orthogonally intersected by a connection part extending in a direction different from the direction of the grid side of the X-axis grid and the Y-axis grid. Figure 8 In (a), the transmittance of the portion (β portion) where the connection portion is provided is higher than that of the X-axis grating 21 and the Y-axis grating 22 , and is lower than that of the portion (α portion) other than the β portion in the gap 23 .

[0006] In the conventional diamond pattern touch panel, as described above, the transmittances of X-axis grid 21 and Y-axis grid 22 and the α portion and β portion of gap 23 are different. Therefore, connection portions 24 and 25 become conspicuous, and the presence of the sensor portion is felt.

[0007] Prior art literature

[0008] Patent Literature

[0009] Patent Document 1: International Publication No. 2015 / 137477 Summary of the invention

[0010] Technical issues to be solved by the invention

[0011] The present invention has been made to address such a problem, and an object of the present invention is to provide a capacitive touch panel having a sensor portion formed in a diamond pattern, in which the sensor portion is not conspicuous.

[0012] Technical solutions for solving technical problems

[0013] The capacitive touch panel of the present invention is a capacitive touch panel formed by laminating a glass substrate, an X-axis sensor unit, a Y-axis sensor unit, and an insulating layer, wherein the glass substrate has a touch surface, the X-axis sensor unit is a pattern in which a plurality of X-axis grids having a rhombus shape are arranged in parallel in a plurality of rows along the X-axis direction, the Y-axis sensor unit is a pattern in which a plurality of Y-axis grids having the same shape as the X-axis grids are arranged in parallel in a plurality of rows along the Y-axis direction orthogonal to the X-axis direction, and the insulating layer is arranged on the X-axis sensor unit. The capacitive touch panel is characterized in that, in a top view observed from the touch surface, the X-axis grids and the Y-axis grids are arranged in a matrix without overlapping, a gap is formed between the frame of the X-axis grid and the frame of the Y-axis grid, the X-axis grid and the Y-axis grid are respectively formed by a metal film composed of fine grids, and a metal film extending from the frame of the X-axis grid or the frame of the Y-axis grid and the grid edge of the fine grid is provided in the gap.

[0014] It is characterized in that, in the above-mentioned X-axis sensor part, X-axis grids adjacent to each other in the X-axis direction are connected to each other by an X-axis connecting part, and in the above-mentioned Y-axis sensor part, Y-axis grids adjacent to each other in the Y-axis direction are connected to each other by a Y-axis connecting part, the above-mentioned X-axis connecting part is formed by a metal film parallel to the grid side of the above-mentioned fine grid, and the above-mentioned Y-axis connecting part is formed by a metal film parallel to the grid side of the above-mentioned fine grid.

[0015] The feature is that the X-axis lattice has a defective portion at a location overlapping with the Y-axis connecting portion in the stacking direction, and the defective portion is formed by defecting at least a portion of a lattice side of the fine lattice.

[0016] The feature is that the Y-axis lattice has a defective portion at a location overlapping with the X-axis connecting portion in the stacking direction, and the defective portion is formed by defecting at least a portion of a lattice side of the fine lattice.

[0017] The present invention is characterized in that the metal thin film provided in the gap is formed with the same pitch and line width as those of the metal thin film constituting the fine grid.

[0018] The invention is characterized in that a plurality of cut portions are provided in the fine grid of the X-axis grid or the Y-axis grid, the internal spaces of adjacent fine grids are connected, and the cut portion is formed by cutting a part of at least one side of the grid sides.

[0019] The cut-off portion is characterized in that the air in the internal space of the fine grid flows out in one direction of the X-axis direction or the Y-axis direction.

[0020] Effects of the Invention

[0021] The capacitive touch panel of the present invention is a touch panel in which diamond-shaped X-axis grids arranged in the X-axis direction and diamond-shaped Y-axis grids arranged in the Y-axis direction are arranged in a matrix shape, and a metal film extending from the frame of the X-axis grid or the frame of the Y-axis grid in parallel with the grid edge of the fine grid is provided in the gap formed between the frame of the X-axis grid and the frame of the Y-axis grid, so that the gap between the grids is filled with the metal film, and the transmittance of the gap part and the grid part becomes substantially the same. As a result, the transmittance of the entire sensor part becomes substantially uniform, so the existence of the sensor part becomes inconspicuous, which can improve the quality.

[0022] The X-axis connection portion is formed by a metal film parallel to the lattice side of the fine lattice, and the Y-axis connection portion is formed by a metal film parallel to the lattice side of the fine lattice. Therefore, compared with the case where each connection portion is connected by a connection portion extending in a direction different from the direction of the lattice side, the existence of the connection portion can be made less conspicuous.

[0023] The X-axis grating or the Y-axis grating has a defective portion at a location overlapping with the Y-axis connecting portion or the X-axis connecting portion in the stacking direction. The defective portion is formed by at least a portion of the grating edge of the fine grating being defective. Therefore, the overlapping portion of the metal film in the stacking direction becomes smaller, and the transmittance and reflectivity of the entire sensor portion can be made uniform.

[0024] The metal thin film provided in the gap is formed at the same pitch and line width as the metal thin film constituting the fine grid, so that the gap portion can be made less conspicuous.

[0025] A plurality of cutouts are provided in the fine grids of the X-axis grid or the Y-axis grid, and the internal spaces of the adjacent fine grids are connected. The cutouts are formed by cutting off a portion of at least one side of the grid sides. Therefore, the cutouts realize the function of removing air, and can suppress the generation of bubbles in the fine grids when the sensor part and the glass substrate are attached. As a result, malfunctions caused by bubbles can be avoided, and the entire sensor part can have a uniform and high transmittance.

[0026] The cut portion is formed so that the air in the internal space of the fine grid flows out in one direction of the X-axis direction or the Y-axis direction. Therefore, the air is smoothly discharged by the roller process after lamination, thereby preventing the generation of bubbles. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 1 and 2 are a plan view and a side view showing an example of a capacitive touch panel of the present invention.

[0028] Figure 2 To show Figure 1 Schematic diagram of an enlarged cross section of a touch panel.

[0029] Figure 3 To show Figure 1 Enlarged views of the boundaries of the X-axis grid and the Y-axis grid, etc.

[0030] Figure 4 To constitute Figure 3 A magnified view of the fine grid of the X-axis grid.

[0031] Figure 5 This is an enlarged view of the X-axis grid at the end of the touch panel in the X-axis direction.

[0032] Figure 6 for Figure 5 A partial enlarged view of .

[0033] Figure 7 This is a partial enlarged view of the X-axis grid and the Y-axis grid of a conventional touch panel.

[0034] Figure 8 To show Figure 7 A magnified view of the boundaries of the X-axis grid and the Y-axis grid.

[0035] Reference numerals

[0036] 1: Capacitive touch panel; 2: First glass substrate; 3: X-axis sensor unit; 4: Second glass substrate; 5: Y-axis sensor unit; 6: Insulating layer; 7: Wiring; 8: External connection terminal; 9: Flexible printed wiring board (FPC); 10: X-axis grid; 10a: Frame; 11: Connection unit; 12: Protrusion; 13: Defective unit; 14: Y-axis grid; 14a: Frame; 15: Connection unit; 16: Defective unit; 17: Gap; 18: Opening; 19: Cutting unit; L1: Connection wiring DETAILED DESCRIPTION

[0037] based on Figure 1 An example of the capacitive touch panel of the present invention will be described. Figure 1 (a) is a top view showing a capacitive touch panel, Figure 1 (b) is its side view. Figure 1As shown in (b), the capacitive touch panel 1 includes a first glass substrate 2 having an X-axis sensor unit 3 for inspection in the X-axis direction and a second glass substrate 4 having a Y-axis sensor unit 5 for inspection in the Y-axis direction, and has a laminated structure in which the first glass substrate 2 and the second glass substrate 4 are bonded together. The surface of the first glass substrate 2 is a touch surface 2a, and the X-axis sensor unit 3 is provided on the opposite surface 2b of the touch surface 2a. In addition, the Y-axis sensor unit 5 is provided on one side of the second glass substrate 4. The X-axis sensor unit 3 and the Y-axis sensor unit 5 are sandwiched between the two glass substrates and face each other. Since the glass substrate is not sandwiched between the two sensor units, the gap between the sensor units is greatly reduced compared to the case where the glass substrate is sandwiched between the two sensor units.

[0038] A flexible printed wiring board (FPC) 9 is connected to the external connection terminal 8 connected to the sensor electrode of each sensor unit through the wiring 7. A control unit (not shown) for touch detection is connected via the FPC 9. In addition, in order to improve environmental resistance, a metal lead frame may be provided instead of the FPC 9. The capacitive touch panel of the present invention utilizes the phenomenon that the capacitance of the electrode changes due to electrostatic coupling between the sensor electrode and the finger, and the specific detection process of the control unit can adopt a known process.

[0039] Figure 2 A schematic diagram of an enlarged cross section of the panel is shown in FIG. Figure 2 As shown, the X-axis sensor unit 3 has an intermediate layer 3b formed on the opposite side of the touch surface 2a of the first glass substrate 2 and a sensor electrode 3a composed of a metal thin film formed thereon. In addition, the Y-axis sensor unit 5 has a sensor electrode 5a composed of a metal thin film formed on one side (first glass substrate side) of the second glass substrate 4 and an intermediate layer 5b formed thereon. When viewed from the touch surface 2a, the metal thin film is formed below the intermediate layer in each sensor unit. According to this, the reflectivity of visible light is reduced to ensure visual recognition.

[0040] The metal thin film constituting the sensor electrodes 3a and 5a is formed by a known thin film forming method using materials such as aluminum (Al), Al alloy, niobium, molybdenum, gold, silver, and copper. Among these, Al thin film is preferably used because of its excellent environmental resistance and low cost.

[0041] The intermediate layers 3b and 5b are thin films containing at least one metal selected from (1) Cr, Mo, and W. In addition, the intermediate layers 3b and 5b are layers (black layers) that appear black due to the interference of visible light and absorb incident light. The switch portion appears black from the touch surface 2a, and reflection can be suppressed. The intermediate layer can be formed by sputtering, etc., similarly to the formation of the above-mentioned Al thin film, etc. In addition, it is preferred that a predetermined amount of at least one oxide selected from (2) Al oxide (Al2O3, etc.) and Ti oxide (TiO2, etc.) is included in the intermediate layer. By including a predetermined amount of these oxides, the reflectivity is further reduced. As the intermediate layer, a mixed layer of Mo and Al2O3 is more preferred. In addition, regarding the film thickness of the intermediate layer, 5nm to 500nm is appropriate, and 20nm to 200nm is more preferred.

[0042] The first glass substrate 2 and the second glass substrate 4 are light-transmitting insulating substrates, and can be made of soda-lime glass, quartz glass, borosilicate glass, alkali-free glass containing no alkali components, etc. Since soda-lime glass has high transmittance and is very cheap for window glass used in general building materials, soda-lime glass is preferably used. In addition, the thickness of each glass substrate is about 0.5 to 5 mm, preferably about 0.5 to 3.0 mm.

[0043] exist Figure 2 In the embodiment, an insulating layer 6 for insulating the sensor electrodes is formed between the X-axis sensor unit 3 and the Y-axis sensor unit 5, or strictly speaking, between the sensor electrode 3a on the X side and the intermediate layer 5b on the Y side. The thickness of the insulating layer is preferably 50 μm to 500 μm. When the thickness of the insulating layer exceeds 500 μm, the gap between the sensor electrodes becomes larger, resulting in a difference in sensitivity between the X-axis sensor unit and the Y-axis sensor unit.

[0044] In addition, Figure 1 and Figure 2 In the embodiment, the X-axis sensor unit is provided on the first glass substrate on the touch surface side, but the Y-axis sensor unit may be provided on the first glass substrate and the X-axis sensor unit may be provided on the second glass substrate.

[0045] Here, if Figure 1As shown in (a), each sensor unit 3, 5 of the touch panel 1 is patterned according to a diamond pattern. Specifically, the X-axis sensor unit 3 is a pattern in which a plurality of diamond-shaped X-axis grids 10 are arranged in a straight line along the X-axis direction, and a plurality of columns are arranged in parallel. The Y-axis sensor unit 5 is a pattern in which a plurality of Y-axis grids 14 of the same shape as the X-axis grid 10 are arranged in a straight line along the Y-axis direction orthogonal to the X-axis direction, and a plurality of columns are arranged in parallel. The X-axis sensor unit 3 and the Y-axis sensor unit 5 are arranged in non-overlapping positions when viewed in the XY plane (in a top view), and the X-axis grid 10 and the Y-axis grid 14 are arranged in a matrix. In the grids of the X-axis grid 10 and the Y-axis grid 14, a finer grid-like portion (fine grid) is formed.

[0046] exist Figure 3 2 is an enlarged view of the boundary between the X-axis grid and the Y-axis grid of the touch panel of the present invention. Figure 3 (a) is Figure 1 A magnified view of part A. Figure 3 (b) is a diagram showing only the X-axis sensor portion, Figure 3 (c) is a diagram showing only the Y-axis sensor portion. Figure 3 (a) to (c) of FIG. 1 correspond to the conventional structures shown in FIG. Figure 8 (a)~(c).

[0047] like Figure 3 As shown in (a), a gap 17 is provided between the grids of the X-axis grid (10A) and the Y-axis grid (14B). The width CL of the gap 17 (the distance between the frame of the X-axis grid and the frame of the Y-axis grid) is formed to be constant in the entire sensor unit. The width CL is set in the range of 10 to 600 μm, for example. In the conventional structure, the transmittance difference occurs between the gap portion and the diamond grid portion, resulting in a structure in which the connection portion, the gap, etc. are easily conspicuous (see Figure 8 ). In contrast, in the present invention, in order to fill the gap, a metal thin film extending from the frame of the rhombus lattice in parallel to the lattice side is provided, so that the transmittance of the gap portion and the rhombus lattice portion is substantially the same.

[0048] based on Figure 3 (b) describes the X-axis grid. The X-axis grid 10A and the X-axis grid 10B each have a rhombus shape surrounded by a frame 10a. The frame 10a is formed with a fine grid, and the fine grid is formed by a metal film with a predetermined spacing and a predetermined line width as described later. The X-axis grid 10A and the X-axis grid 10B are provided with a protrusion 12 protruding outward from the frame 10a. The protrusion 12 is set as an extension line of the grid side of the fine grid, and is formed parallel to the grid side of the fine grid. Figure 3In (b), the protrusions 12 are formed with the same pitch and line width as the fine grid except for the defective portion described later. The protrusion length H of the protrusion 12 is not particularly limited, but is preferably 60 to 95% of the width CL of the gap, and more preferably 70 to 90%.

[0049] exist Figure 3 In (b), the X-axis grid 10A and the X-axis grid 10B adjacent in the X-axis direction are connected via the connecting portion 11. The connecting portion 11 is formed by an edge parallel to the grid edge of the fine grid, and a part of the protrusion 12 is used. The connecting portion 11 and the protrusion 12 are made of a metal film in the same manner as the structure of the fine grid. Specifically, they are made of the above-mentioned sensor electrodes and the intermediate layer. The connecting portion 11 is arranged asymmetrically with respect to the center line of the X-axis grid in the X-axis direction. In addition, the X-axis grid 10A is connected to the connecting portion 15 (see Figure 3 (c)) has a defective portion 13 at a location where the layers overlap in the stacking direction, and the defective portion 13 is formed by a portion of the lattice side of the fine lattice being defective.

[0050] based on Figure 3 (c) describes the Y-axis grid. The Y-axis grid 14A and the Y-axis grid 14B each have a rhombus shape surrounded by a frame 14a. Within the frame 14a, a fine grid is formed in the same manner as the X-axis grid. The Y-axis grid 14A and the Y-axis grid 14B adjacent to each other in the Y-axis direction are connected via a connecting portion 15. The connecting portion 15 is formed by edges parallel to the grid edges of the fine grid, and is made of a metal film in the same manner as the structure of the fine grid. Specifically, it is made of the above-mentioned sensor electrode and the intermediate layer. The connecting portion 15 is asymmetrically arranged with respect to the center line of the Y-axis grid in the Y-axis direction. In addition, the Y-axis grid 14A is symmetrically arranged with respect to the connecting portion 11 (refer to Figure 3 (b)) has a defective portion 16 at a location where the fine grid overlaps in the stacking direction. The defective portion 16 is formed by a portion of the grid edge of the fine grid being defective. Figure 3 In (c), the missing portion 16 is provided on the frame 14a.

[0051] In order to detect the capacitance of the X-axis sensor unit and the Y-axis sensor unit with high accuracy, it is preferable to configure the X-axis sensor electrode and the Y-axis sensor electrode to be non-overlapping in the stacking direction. Figure 3 (b) Figure 3 As shown in (c), defective portions 13 and 16 are provided at the locations where the X-axis grid or the Y-axis grid overlaps with the Y-axis connecting portion or the X-axis connecting portion in the stacking direction. This improves the detection accuracy and enables more uniform transmittance and reflectance to be achieved in the entire sensor portion. Figure 3In (a), the four grids (10A, 10B, 14A, 14B) adjacent to each other in the XY plane do not overlap except at the intersection P where the frame of the X-axis grid 10A intersects with the connecting portion 15. In addition, it is preferred that the intersection of the X-axis sensor portion and the Y-axis sensor portion is not located on the gap 17.

[0052] exist Figure 3 In the embodiment, the protrusions 12 are provided on the X-axis grids 10A and 10B of the X-axis sensor portion. However, the protrusions 12 may be omitted and the Y-axis grids 14A and 14B of the Y-axis sensor portion may be provided with protrusions.

[0053] Figure 4 A partial enlarged view of a fine grid is shown in FIG. The grid-like portion is formed by overlapping the sensor electrode and the intermediate layer in the above order. There is an opening 18 between the grids, and no sensor electrode or intermediate layer is formed in this portion. The grid-like portion is a very fine grid, so it becomes a transparent and visible light-transmitting portion at a glance. Regarding the grid-like portion, the line width W is usually set to about 3μm to 50μm, and the line spacing P is set to about 0.2mm to 1mm.

[0054] The sensor electrodes of each sensor unit are formed of a metal thin film. For example, when the metal thin film is an Al thin film, the Al thin film is formed by sputtering or vacuum deposition using an Al solid target (evaporation material) as a vacuum process. Figure 1 (a)) is also formed integrally with the sensor electrode at the same time. As a vacuum process, sputtering is preferably used because it can form a uniform film. Sputtering is a method of forming by causing accelerated argon ions to collide with a solid target, causing atoms or molecules escaping from the target surface to adhere to the glass substrate.

[0055] The method of processing the Al thin film into a predetermined shape such as a grid shape is not particularly limited. Since the wiring connected to the sensor electrode and the above-mentioned fine grid portion can be formed with high precision, it is preferable to use a known photo resolution technology. For example, after forming the Al thin film by sputtering or vacuum evaporation, a mask layer of an etching pattern is formed by screen printing using a resist material, and the Al thin film is wet-etched by wet etching using a predetermined etching solution to form fine wiring. In addition, the film thickness of the Al thin film is appropriately 100nm to 5000nm.

[0056] Here, the insulating layer 6 (see Figure 2) is formed by an optical adhesive film (OCA) and an optical resin (OCR). The touch panel of the present invention is obtained by a method of adhering OCA to the surface of any one of the sensor electrode 3a and the intermediate layer 5b and attaching the sensor substrate of the other party, or a method of filling OCR on the surface of any one of the sensor electrode 3a and the intermediate layer 5b and attaching the above-mentioned sensor substrate. After lamination, a roller treatment is performed in one direction of the X-axis direction or the Y-axis direction. However, when adhering OCA or filling OCR, it is possible that due to the unevenness (height difference) of the Al film, the air has nowhere to be discharged, and bubbles are drawn into the inside of the fine grid. As a result, failures and malfunctions caused by bubbles may occur.

[0057] exist Figure 5 and Figure 6 In the embodiment, a structure is formed in which a defoaming portion is formed in the X-axis sensor portion 3' to prevent clogging inside the fine grid. Figure 5 The X-axis grid 10C and the X-axis grid 10D at one end of the X-axis direction are shown. As described above, the X-axis grids are also provided with protrusions 12 protruding from the frame 10a toward the gap. In addition, the X-axis grid 10C and the X-axis grid 10D are connected by a connection portion 11 formed by a side parallel to the grid side of the fine grid. Here, the dotted line L1 shows a connection wiring, which is a wiring for connecting each X-axis grid arranged in the X-axis direction.

[0058] Figure 6 Shown in Figure 5 The enlarged view of part C. Figure 6 As shown in the figure, a cutting section 19 is provided as a debubbling section, and the cutting section 19 is formed by cutting a part of one side of the grid side of the fine grid. By providing the cutting section 19, the internal spaces of adjacent fine grids are connected, so that bubbles become easier to be removed during roller processing. As a result, it is possible to prevent bubbles from being generated inside the grid, and the entire sensor area can achieve a uniform and high transmittance.

[0059] The cut distance (opening distance) of the lattice side of the cut portion 19 is not particularly limited, but is preferably 20 to 50 μm. In consideration of the length of one side of the lattice side, it is preferably 1 / 20 to 1 / 5 of the length of one side of the lattice side, and more preferably 1 / 10 to 1 / 6 of the length of the lattice side.

[0060] The position of the cutout 19 is not particularly limited, and the cutout 19 may be formed at a lattice side other than the lattice side constituting the connection wiring L1. The cutout 19 is preferably formed so that the air in the inner space of the fine lattice is directed in one direction of the X-axis direction (in Figure 6 In addition, in order to make the air flow smooth, it is preferred to continuously configure the cutting portion 19 in a straight line parallel to the lattice side.

[0061] exist Figure 1 to Figure 6 In the embodiment, the capacitive touch panel is configured such that two glass substrates are overlapped and each sensor portion is sandwiched therebetween, but the present invention is not limited thereto and a structure using a single glass substrate may also be used.

[0062] Industrial Applicability

[0063] In the projected capacitive touch switch panel of the present invention, the sensor portion is inconspicuous, and therefore, it can be suitably used as an input means for various devices such as home appliances, AV equipment, PC / OA equipment, industrial machinery, and other electronic devices.

Claims

1. A capacitive touch panel, comprising a glass substrate, an X-axis sensor portion, a Y-axis sensor portion, and an insulating layer stacked together, wherein: The glass substrate has a touch surface, the X-axis sensor portion is a pattern in which a plurality of diamond-shaped X-axis grids are arranged in parallel in a plurality of rows along the X-axis direction, the Y-axis sensor portion is a pattern in which a plurality of Y-axis grids having the same shape as the X-axis grids are arranged in parallel in a plurality of rows along the Y-axis direction orthogonal to the X-axis direction, the insulating layer is arranged between the X-axis sensor portion and the Y-axis sensor portion, and the capacitive touch panel is characterized in that: In a plan view viewed from the touch surface, the X-axis grids and the Y-axis grids are arranged in a matrix without overlapping each other, and a gap is formed between a frame of the X-axis grid and a frame of the Y-axis grid. The X-axis grid and the Y-axis grid are respectively formed by a metal film composed of fine grids, and a metal film extending from a frame of the X-axis grid or a frame of the Y-axis grid in parallel with a grid side of the fine grid is provided in the gap as a protrusion, and the length of the protrusion is 60 to 95% of the width of the gap. In the X-axis sensor section, adjacent X-axis grids in the X-axis direction are connected to each other by an X-axis connecting section, and in the Y-axis sensor section, adjacent Y-axis grids in the Y-axis direction are connected to each other by a Y-axis connecting section. The X-axis connection portion is formed of a metal thin film parallel to the lattice sides of the fine lattice, and the Y-axis connection portion is formed of a metal thin film parallel to the lattice sides of the fine lattice. The X-axis lattice has a defective portion at a location overlapping with the Y-axis connecting portion in a stacking direction, and the defective portion is formed by defecting at least a portion of a lattice side of the fine lattice.

2. The capacitive touch panel according to claim 1, characterized in that: The Y-axis lattice has a defective portion at a location overlapping with the X-axis connecting portion in a stacking direction, and the defective portion is formed by defecting at least a portion of a lattice side of the fine lattice.

3. The capacitive touch panel according to claim 1, characterized in that: The metal thin film provided in the gap is formed with the same pitch and line width as those of the metal thin film constituting the fine grid.

4. The capacitive touch panel according to claim 1, characterized in that: A plurality of cutouts are provided in the fine grids of the X-axis grid or the Y-axis grid, and the internal spaces of adjacent fine grids are connected. The cutouts are formed by cutting a portion of at least one side of the grid sides.

5. The capacitive touch panel according to claim 4, characterized in that: The cut-off portion is formed so that air in the internal space of the fine grid flows out in one direction of the X-axis direction or the Y-axis direction.

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