Substrate Pattern Forming Apparatus and Pattern Forming Method

Abstract

To provide a substrate formed of a pattern with excellent visibility.SOLUTION: A manufacturing apparatus 500 of substrate 1a includes: a holding part 28 which holds the substrate 1a formed with projecting parts or recessed parts; and a laser irradiation part 20 as one example of a pattern formation part which forms a pattern 11 on the substrate 1a. Therein, the pattern 11 is formed on at least one or more of the projecting part, the recessed part, a circumference of the projecting part or a circumference of the recessed part, and a portion along the projecting part or the recessed part. The pattern 11 is composed of aggregates of dot parts 110 and the laser irradiation part 20 forms the dot part 110 by means of laser irradiation.SELECTED DRAWING: Figure 16

Description

Technical Field

[0001] The present invention relates to an apparatus for forming a pattern on a substrate. and Pattern forming method by law is concerned.

Background Art

[0002] Patent Document 1 (Japanese Patent Application Laid-Open No. 2011-011819) describes that the description items are directly printed on the bottle 2 by hot stamping or embossing by die forming, and the configuration of the PET bottle is made up of a cap and a bottle without using a label.

Summary of the Invention

Problems to be Solved by the Invention

[0003] An object of the present invention is to provide a substrate having good visibility or design.

Means for Solving the Problems

[0004] The apparatus for forming a pattern on a substrate according to the present invention includes a holding unit that holds a substrate on which a convex portion and and a concave portion are formed, and a pattern forming unit that forms a pattern on the substrate. The pattern forming unit forms the pattern by laser irradiation across the top of the convex portion, the bottom of the concave portion, and the side portion of the convex portion or the concave portion, and the pattern forming unit performs laser irradiation so that the laser focus position is near the side portion of the convex portion or the concave portion.

Effects of the Invention

[0005] According to the present invention, a substrate having good visibility or design can be provided.

Brief Description of the Drawings

[0006] [Fig. 1] It is a diagram showing an example of a predetermined shape according to an embodiment of the present invention. [Fig. 2] It is a diagram showing a configuration example of a dot portion according to the present embodiment, (a) is a top view, and (b) is a cross-sectional view taken along the C-C arrow of (a). [Fig. 3]It is a scanning electron micrograph of the dot part according to this embodiment. (a) is a perspective view seen from the upper surface direction, and (b) is a perspective view seen from the cross-sectional direction of the D-D arrow in (a). [Fig. 4] It is a figure showing a specific example of the container according to this embodiment. [Fig. 5] It is a figure showing the manufacturing apparatus according to this embodiment. [Fig. 6] It is a figure for explaining the focus of the laser beam according to this embodiment. [Fig. 7] It is a figure for explaining the spot diameter of the laser beam according to this embodiment. [Fig. 8] It is a figure for explaining the characteristics of the spot diameter of the laser beam according to this embodiment. [Fig. 9] It is a figure for explaining the setting of the focus and power of the laser beam according to this embodiment. [Fig. 10] It is a figure for explaining the beam expander according to this embodiment. [Fig. 11] It is a figure for explaining a modified example of the manufacturing apparatus according to this embodiment. [Fig. 12] It is a figure for explaining the first and second mounting parts in the modified example shown in FIG. 11. [Fig. 13] It is a figure for explaining the laser irradiation direction in the modified example shown in FIG. 11. [Fig. 14] It is a figure showing a modified example of the container according to this embodiment. [Fig. 15] It is a figure showing a second modified example of the container according to this embodiment. [Fig. 16] It is a figure showing a third modified example of the container according to this embodiment. [Fig. 17] It is a figure showing a fourth modified example of the container according to this embodiment. [Fig. 18] It is a figure showing a fifth modified example of the container according to this embodiment. [Fig. 19] It is a figure showing a sixth modified example of the container according to this embodiment. [Fig. 20] It is a figure showing a seventh modified example of the container according to this embodiment. [Fig. 21] It is a figure which shows the 8th modification of the storage container which concerns on this Embodiment. [Fig. 22] It is a figure which shows the 9th modification of the storage container which concerns on this Embodiment. [Fig. 23] It is a figure which shows the 10th modification of the storage container which concerns on this Embodiment. [Fig. 24] It is a figure which shows the 11th modification of the storage container which concerns on this Embodiment.

Mode for Carrying Out the Invention

[0007] Hereinafter, the mode for carrying out the invention will be described with reference to the drawings. In each drawing, the same reference numerals are given to the same components, and redundant descriptions may be omitted. Further, the embodiments shown below are examples of apparatuses for embodying the technical idea of the present invention, and the present invention is not limited to the embodiments shown below. The dimensions, materials, shapes, relative arrangements, etc. of the components described below are not intended to limit the scope of the present invention only to those, but are intended to be illustrative unless otherwise specified. Also, the sizes and positional relationships of the members shown in the drawings may be exaggerated for clarity of explanation.

[0008] The base material according to the embodiment of the present invention is a base material in which a predetermined shape constituting a pattern is formed in at least a part of the region. The base material means the material part of the object. Examples of the object include a storage container. The storage container includes, for example, a PET bottle containing a resin such as PET and storing a beverage. However, there is no particular limitation on the object, and it may be any object. The storage container also has no limitation on the shape and material, and may be a storage container of any shape and any material.

[0009] The "at least a part of the region" in the base material includes the region on the surface of the base material. The surface of the base material means the surface that touches the external air or the like in the material. In the embodiment, since the term "surface of the base material" is used as a term symmetric to the inside of the base material, for example, in the case of a plate-shaped base material, both the front surface and the back surface of the base material correspond to the surface of the base material. In the case of a cylindrical base material, both the outer surface and the inner surface of the base material correspond to the surface of the base material.

[0010] The pattern is an example of an information display unit and includes characters, codes such as barcodes, figures, images, etc. For example, it displays information about the contents, such as the name, identification number, manufacturer, manufacturing date, etc. of the container or the contents such as beverages contained in the container.

[0011] In a container such as a PET bottle, these information may be displayed by attaching a recording medium on which these information are recorded to the surface of the container. However, in the embodiment, by forming a pattern indicating these information on the surface of the base material constituting the container, these information are displayed without using a recording medium.

[0012] FIG. 1 is a diagram for explaining an example of a predetermined shape formed on the base material according to the present embodiment. FIG. 1 shows a part of the base material 1a constituting the container 1 on which the pattern 11 is formed on the surface. The container 1 and the contents constitute a container body. The container 1 is constituted by a base material 1a made of a PET resin having transparency to visible light as an example. Note that visible light is light having a lower wavelength limit of about 360 nm to about 400 nm and an upper wavelength limit of about 760 nm to about 16000 nm.

[0013] The pattern 11 constitutes the character string "label-free" as an example. The region A is a part of the region in the character "s" in the pattern 11. The perspective view B is a diagram schematically showing the region A enlarged to explain the details of the configuration of the pattern 11.

[0014] As shown in the perspective view B, the region A contains a plurality of dot portions 110. These dot portions 110 are formed in at least a partial region of the base material and are an example of a predetermined shape that constitutes a pattern. Note that the predetermined shape includes the shape formed on the surface of the base material and the internal shape such as a void portion under the surface of the shape formed on the surface of the base material.

[0015] The dot portion 110 is a clouded portion as a visual example and includes a concave portion 111 and a convex portion 112. The concave portion 111 is a portion that is recessed with respect to the surface of the base material 1a constituting the container 1 and is an example of a predetermined concave portion. The convex portion 112 is a portion that protrudes with respect to the surface of the base material 1a constituting the container 1 and is an example of a predetermined convex portion. The convex portion 112 is formed around the concave portion 111 so as to surround the concave portion 111.

[0016] The plurality of dot portions 110 are formed as an aggregate on the base material 1a constituting the container 1, thereby constituting the character string "label-free" in the pattern 11. Here, the aggregate means something formed by the aggregation of individual ones, and the pattern 11 is constituted by an aggregate of a plurality of dot portions 110.

[0017] In the base material 1a, the pattern region 13 in which the pattern 11 is formed by the plurality of dot portions 110 corresponds to the first region. Also, the non-pattern region 12 other than the first region in the base material 1a corresponds to the second region.

[0018] Since a plurality of dot portions 110 are formed in the pattern region 13, the reflection direction and light diffusibility of the light incident on the container 1 are different from those of the non-pattern region 12. Thereby, in the pattern region 13 and the non-pattern region 12, at least one of the light transmittance or the light reflectance with respect to the light incident on the container 1 is different. By at least one of the light transmittance or the light reflectance being different, a person viewing the container 1 can visually recognize the pattern 11 formed on the container 1.

[0019] Also, the overall width (dot width) of each of the plurality of dot portions 110 and the interval (dot interval) between the plurality of dot portions 110 are small with respect to Pattern 11. As a result, a person viewing the container 1 can visually recognize the characters "label-free" of Pattern 11 without visually recognizing the dot portions 110 themselves.

[0020] The gap between dots for the dot portions 110 themselves not to be visually recognized varies depending on the visual acuity of a person viewing the container 1, the distance between the eyes and the container 1, etc., but is preferably 100 μm or less. Also, the smaller the dot width, the better, but it is preferably smaller than about 100 μm as a size at which the shape of the dot portion itself cannot be discriminated. This point will be further described in detail.

[0021] When a person with a visual acuity of about 1.5 views the container 1 at a distance of about 30 cm, generally, black and white dots (dots) of 50 μm can be discriminated. If the contrast between black and white is low, this limit value also increases, but it is generally about 50 μm. However, dots of 30 μm can be visually recognized as long as there are dots, and in some cases, dots of 10 μm can also be visually recognized if the contrast of the dots is high.

[0022] Also, when there are two adjacent dot portions 110, whether the two dot portions 110 can be visually recognized is determined by the resolution of a person's eyes, etc. Note that the resolution refers to the minimum distance at which two points can be recognized as two separated points.

[0023] The resolution of a person's eyes depends on the visual acuity, but is generally 100 μm at a distance of 30 cm. 30 cm corresponds to the distance when picking up a PET bottle containing drinking water, etc. and visually recognizing information such as a label displayed on the PET bottle. That is, when picking up the PET bottle with the elbow slightly bent, the distance between a person's eyes and the PET bottle is about 30 cm. Considering a person's physique, this distance varies in the range of about 30 cm to 50 cm. The resolution is about 100 μm at a distance of 30 cm and about 160 μm at a distance of 50 cm.

[0024] Also, in another index, when guaranteeing 200 dpi (dots per inch) as the resolution boundary, if the gap between adjacent dots is 130 μm or less, the dots will be visually recognized as a single mass without being resolved one by one.

[0025] From the above, by making the gap between dots preferably 160 μm or less, more preferably 100 μm or less, the dot portions 110 are not visually recognized as being separated one by one but as a continuous body, enabling the visual recognition of patterns such as the characters "label-free" of pattern 11. Also, when the size of the dots becomes larger than 100 μm, there may be cases where changes in the shape of the dots themselves are visually recognized. Therefore, by making the dots preferably 160 μm or less, more preferably 100 μm or less, even if there are shape changes within the dots, the dots can be perceptually recognized as a uniform pattern, and patterns such as characters that are aggregates thereof can be visually recognized as a uniform pattern without a granular feeling.

[0026] To form the dot portions 110, various processing methods such as laser processing, electrical discharge machining, etching, cutting, or molding using a mold can be applied. However, among these, the laser processing method is suitable because it can process the base material non-contact, and high-speed processing can be achieved by scanning the laser light, arraying the light sources, or pattern exposure.

[0027] In laser processing, by adjusting the light energy of the irradiated laser light (laser beam), the size, shape, depth, etc. of the dot portions 110 can be changed. Also, although the cross-sectional intensity distribution of the laser beam is generally a Gaussian distribution, it is also possible to adjust the intensity distribution by combining the laser beams of the array light sources or to generate a top-hat-shaped intensity distribution with a flat central intensity distribution by designing the irradiation optical system.

[0028] The concave portion 111 in the dot portion 110 is formed by melting, burning away, vaporizing, or deforming a part of the base material 1a at the irradiation position of the laser beam. The convex portion 112 is formed by a part of the base material 1a separated from the concave portion 111 adhering to the periphery of the concave portion 111 without burning away or vaporizing and solidifying. Since it is a process mainly using thermal energy, a resin or the like with a relatively low thermal conductivity is suitable as the material of the base material 1a, but other materials such as glass are also applicable.

[0029] Also, by controlling the thermal conductivity, various predetermined shapes such as the dot portion 110 can be formed. For controlling the thermal conductivity, for example, making the base material 1a itself have a high thermal conductivity, or closely adhering another member with a high thermal conductivity to the base material 1a to rapidly release the heat generated in the base material 1a by the irradiation of the laser beam, etc. can be considered. Examples of other members with high thermal conductivity include a coolant and metal.

[0030] Also, since phenomena such as melting, evaporation, crystallization, or foaming in laser processing occur irregularly within the irradiation region, the surface of the pattern region 13 tends to be rough and the surface roughness becomes larger compared to the non-pattern region 12. Due to the large surface roughness, in the pattern region 13, the light diffusibility with respect to the light incident on the container 1 becomes higher than that of the non-pattern region 12. As a result, the contrast of the pattern 11 increases and the visibility is further improved. In this regard, the application of laser processing is more suitable.

[0031] Also, in this embodiment, since the pattern is constituted by an aggregate of a plurality of dot portions 110 including at least one of the concave portion 111 and the convex portion 112, the surface area increases along the shapes of the concave portion 111 and the convex portion 112, so that compared with the case where the pattern is constituted by grooves or depressions as a block, the region with a large surface roughness becomes even larger. Also, since the pattern is constituted by an aggregate of a plurality of dot portions 110, the surface area further increases along the shapes of the plurality of dot portions 110. Thereby, the light diffusibility becomes even higher, the contrast increases, and the visibility is further improved.

[0032] In the example shown in the perspective view B, the dot portions 110 are regularly arranged in a square lattice, but the present invention is not limited thereto. They may be arranged in a triangular lattice or a honeycomb shape, or may be irregularly formed with different arrangement intervals without being regularly arranged.

[0033] In addition, although the pattern 11 including the string "label-free" is exemplified, the present invention is not limited thereto. The pattern 11 can also be constituted by any string, a figure or a photograph, a symbol or a code such as a barcode or a QR code, and a combination thereof. In other words, the pattern 11 is an image, and an image can be formed by a predetermined shape such as the dot portion 110.

[0034] <Configuration Example of Dot Portion 110> FIG. 2 is a diagram for explaining an example of the configuration of the dot portion 110 according to the present embodiment, (a) is a top view, and (b) is a cross-sectional view taken along the C-C arrow in (a). FIG. 3 is a scanning electron microscope (SEM) photograph of the dot portion 110 according to the present embodiment, (a) is a perspective view seen from the top surface direction, and (b) is a perspective view seen from the D-D arrow cross-sectional direction in (a). FIG. 3 is an SEM photograph of a partially enlarged observation within the pattern region 13. In FIG. 3(a), the entire two of the plurality of dot portions 110 are observed, and a part of the two dot portions 110 is slightly observed on the positive Y-axis side, and a part of the two dot portions 110 is slightly observed on the negative Y-axis side. Also, the dot width is formed to be about 100 μm.

[0035] As shown in FIGS. 2 and 3, the dot portion 110 includes a concave portion 111 and a convex portion 112. The concave portion 111 includes a first inclined surface 1111 (hatched portion) and a bottom portion 1112 (black-filled portion), and is formed in a bowl shape. The concave width Dc represents the width of the concave portion 111, and the depth dp represents the height (length in the Z-axis direction) of the bottom portion 1112 with respect to the surface of the non-pattern region 12.

[0036] Further, the convex portion 112 includes a top portion 1121 (vertical line hatched portion) and a second inclined surface 1122 (matte hatched portion), and is formed in an annular surface shape. The annular surface refers to a rotational surface obtained by rotating a circumference. The annular width Dr represents the radial width of the annular surface portion of the convex portion 112, and the height h represents the height (length in the Z-axis direction) of the top portion 1121 with respect to the surface of the non-pattern region 12.

[0037] The dot width W represents the entire width of the dot portion 110. The first inclined surface 1111 and the second inclined surface 1122 are continuous surfaces. A continuous surface means a surface that is made of the same material and is connected without a step.

[0038] Also, as shown in FIG. 3, minute uneven portions 113 are formed on the surfaces constituting the concave portion 111 and the convex portion 112, and the surfaces are rough. The uneven portion 113 is an example of an uneven portion composed of concave and convex portions smaller than a predetermined shape. The uneven portion 113 is composed of concave and convex portions having a width smaller than the dot width W of the dot portion 110, and typically consists of concave and convex portions having a width of about 1 μm to 10 μm.

[0039] Also, as shown in FIG. 3(a), in the region between the dot portions 110, the processed pieces generated when processing the dot portions 110 are scattered, and the surface is also roughened by these. In the pattern region 13, due to the roughening of the surface by the uneven portions 113 and the processed pieces, the surface roughness becomes larger compared to the non-pattern region.

[0040] The dot portion 110 can be formed, for example, by irradiating the base material 1a with laser light to modify the surface of the base material 1a. One dot portion 110 is formed by condensing the laser light at one point on the base material 1a. Further, by two-dimensionally scanning this laser light, a plurality of dot portions 110 are formed. Alternatively, it can also be formed by a plurality of laser lights emitted from respective laser light sources arrayed. Furthermore, by irradiating an enlarged laser light to a mask member having a plurality of light transmission openings corresponding to the positions of the respective dot portions 110, a plurality of dot portions 110 can be formed in parallel by one exposure with each of the plurality of transmitted laser light groups that have passed through the respective light transmission openings of the mask member.

[0041] As the laser light source for irradiating laser light, various laser light sources can be used. Those capable of pulsed oscillation from picoseconds to nanoseconds are preferred. Examples of solid-state lasers include YAG lasers and titanium sapphire lasers. Examples of gas lasers include argon lasers, helium-neon lasers, and carbon dioxide lasers. Semiconductor lasers are also preferred due to their small size. In addition, a fiber laser, which is a type of solid-state laser that uses an optical fiber as the gain medium, is the most suitable light source in terms of its high peak energy and the ability to be miniaturized.

[0042] FIG. 4 is a diagram showing a specific example of the container according to this embodiment. In recent years, PET bottles and the like have shifted in the direction of becoming thinner in order to reduce the amount of plastic used in the trend of reducing plastic waste. As they become thinner, the strength of the bottles becomes insufficient, so in order to increase the rigidity, it is already known to form ribs by providing unevenness in the lateral direction. In addition, various forms of ribs may be provided for improving light-shielding properties and design.

[0043] On the base material 1a of the container 1 shown in FIG. 4, uneven ribs are formed. Specifically, the container 1 includes a convex top portion 1A, a concave bottom portion 1B, and a concave side portion 1C. The concave side portion 1C is a convex side portion 1C when the concave bottom portion 1B is used as a reference plane.

[0044] The container 1 includes a plurality of top portions 1A. Among the plurality of top portions 1A, one top portion 1A is a pattern region 13 where a pattern 11 is formed, and the other top portions 1A are non-pattern regions 12 where the pattern 11 is not formed.

[0045] The container 1 includes a plurality of bottom portions 1B. Among the plurality of bottom portions 1B, one bottom portion 1B is a pattern region 13 where a pattern 11 is formed, and the other bottom portions 1B are non-pattern regions 12 where the pattern 11 is not formed.

[0046] The container 1 includes a plurality of side portions 1C. One of the plurality of side portions 1C is a pattern region 13 where a pattern 11 is formed, and the other side portions 1C are non-pattern regions 12 where the pattern 11 is not formed.

[0047] In FIG. 4, the uneven ribs formed on the base material 1a were formed in the horizontal direction, but they may be formed in the vertical direction, the diagonal direction, or a combination of these directions.

[0048] FIG. 5 is a diagram showing the manufacturing apparatus according to the present embodiment. The manufacturing apparatus 500 for the container 1 including the base material 1a includes a laser irradiation unit 20 as an example of a pattern forming unit that forms the pattern 11, holding units 28a and 28b that hold the container 1 including the base material 1a, and a holding plate 29 that holds the holding units 28a and 28b. The manufacturing apparatus 100 is an example of a pattern forming apparatus, an information forming apparatus, and a laser processing apparatus. The manufacturing apparatus 100 is incorporated into the manufacturing apparatus of the container 1 or the container body in a factory and is included in one process determined in the flow order of the manufacturing line of the container 1 or the container body.

[0049] The laser irradiation unit 20 includes a laser light source 21, a beam expander 23, a scanning unit 24 that scans light with a mirror or the like, a scanning lens 25, and stereo cameras 26a and 26b.

[0050] The beam expander 23 receives the laser light 22 emitted from the laser light source 21 and changes the focal position of the laser light 27 irradiated onto the base material 1a.

[0051] The stereo cameras 26a and 26b are an example of a position detection unit that detects the position of the convex or concave portion of the base material 1a, and are also an example of a distance detection unit that detects the distance to the convex or concave portion of the base material 1a. The laser irradiation unit 20 controls the energy, beam diameter, or focal position of the laser beam 27 based on the distance measurement data to the convex or concave portion of the base material 1a detected by the stereo cameras 26a and 26b. The laser irradiation unit 20 also considers the continuous width (size) of the top portion 1A, bottom portion 1B, and side portion 1C, and controls the energy, beam diameter, or focal position of the laser beam 27 according to the portion with the larger width among the adjacent top portion 1A, bottom portion 1B, and side portion 1C within the irradiation area of the laser beam 27. Further, when the laser irradiation unit 20 performs laser irradiation across two or more of the top portion 1A, bottom portion 1B, and side portion 1C, it may control the energy, beam diameter, or focal position of the laser beam 27 based on the distance measurement data of the portion where the laser irradiation starts or ends.

[0052] FIG. 6 is a diagram for explaining the focal point of the laser beam according to the present embodiment. FIG. 6(a) shows a state where the focal position 30 of the laser beam 27 irradiated on the base material 1a is near the top portion 1A.

[0053] FIG. 6(b) shows a state where the focal position 30 of the laser beam 27 irradiated on the base material 1a is in the middle of the top portion 1A and the bottom portion 1B, that is, near the side portion 1C.

[0054] FIG. 6(c) shows a state where the focal position 30 of the laser beam 27 irradiated on the base material 1a is near the bottom portion 1B.

[0055] FIG. 7 is a diagram for explaining the spot diameter of the laser beam according to the present embodiment. FIG. 7(a) shows the spot diameter in the state shown in FIG. 6(a). The spot diameter 31 near the bottom portion 1B is larger because it is away from the focal position 30.

[0056] FIG. 7(b) shows the spot diameter in the state shown in FIG. 6(b). The spot diameter 31 near the bottom portion 1B is smaller than that in the state of FIG. 7(a).

[0057] Figure 7(c) shows the spot diameter in the state shown in Figure 6(c). Since the spot diameter 32 near the top 1A is away from the focal position 30, it is larger than in the state of Figure 7(b).

[0058] Figure 8 is a diagram for explaining the characteristics of the spot diameter of the laser beam according to the present embodiment. Figure 8(a) shows the relationship between the spot diameter and the energy per unit area, showing that as the distance from the focal position increases, the spot diameter increases and the energy per unit area decreases.

[0059] Figure 8(b) is a diagram showing the relationship between the spot diameter and the laser power in the present embodiment. In the present embodiment, as the spot diameter increases due to the focal position shift, the laser light source 21 is controlled to increase the laser power. The laser power may be increased by varying the density of the ND filter or changing the duty ratio of the lighting time of the laser light source 21.

[0060] Figure 8(c) is a diagram for explaining the relationship between the spot diameter and the energy per unit area × laser power in the present embodiment. As the distance from the focal position increases, the spot diameter increases and the energy per unit area decreases. However, in the present embodiment, the energy per unit area is made constant by increasing the laser power.

[0061] Figure 9 is a diagram for explaining the setting of the focal point and power of the laser beam according to the present embodiment. (1) is the case of forming the pattern 11 only on the top 1A. As shown in Figure 6(a), the beam expander 23 is set so that the focal position 30 of the laser beam 27 is near the top 1A. In this case, since the pattern 11 is not formed on the side portion 1C and the bottom portion 1B, there is no problem with the laser power remaining constant. In this case, the pattern 11 formed on the top 1A is visible from any direction, so the visibility is good.

[0062] (2) is the case where pattern 11 is formed only on the side portion 1C. As shown in FIG. 6(b), the beam expander 23 is set such that the focus 30 of the laser beam 27 is near the side portion 1C. In this case, since pattern 11 is not formed on the top portion 1A and the bottom portion 1B, the laser power remains constant without any problem. In this case, the pattern 11 formed on the side portion 1C has good visibility from above the container and will not disappear due to rubbing on the surface during manufacturing or transportation.

[0063] (3) is the case where pattern 11 is formed only on the bottom portion 1B. As shown in FIG. 6(c), the beam expander 23 is set such that the focus 30 of the laser beam 27 is near the bottom portion 1B. In this case, since pattern 11 is not formed on the top portion 1A and the side portion 1C, the laser power remains constant without any problem. In this case, the pattern 11 formed on the bottom portion 1B will not disappear due to rubbing on the surface during manufacturing or transportation.

[0064] (4) is the case where a thin pattern 11 is formed on the top portion 1A and a thick pattern 11 is formed on the bottom portion 1B. As shown in FIG. 6(a), the beam expander 23 is set such that the focus 30 of the laser beam 27 is near the top portion 1A. In this case, as shown in FIG. 7(a), since the spot diameter 31 near the bottom portion 1B becomes large, when irradiating the bottom portion 1B with the laser, the laser light source 21 is controlled so that the laser power becomes larger than when irradiating the top portion 1A with the laser.

[0065] (5) is the case where a thick pattern 11 is formed on the top portion 1A and a thin pattern 11 is formed on the bottom portion 1B. As shown in FIG. 6(c), the beam expander 23 is set such that the focus 30 of the laser beam 27 is near the bottom portion 1B. In this case, as shown in FIG. 7(c), since the spot diameter 32 near the top portion 1A becomes large, when irradiating the top portion 1A with the laser, the laser light source 21 is controlled so that the laser power becomes larger than when irradiating the bottom portion 1B with the laser.

[0066] (6) is the case of forming the pattern 11 on the top 1A, side 1C, and bottom 1B. As shown in FIG. 6(b), the beam expander 23 is set so that the focus 30 of the laser beam 27 is near the side 1C. In this case, as shown in FIG. 7(b), the spot diameter 32 near the top 1A and the spot diameter 31 near the bottom 1B become larger, but are smaller compared to the cases of FIGS. 7(a) and 7(c). Therefore, the laser power remains constant.

[0067] FIG. 10 is a diagram for explaining the beam expander according to the present embodiment. The beam expander 23 shown in FIG. 10(a) includes a concave lens 60 having a negative power and a convex lens 61 having a positive power. Thereby, the beam width becomes larger, and it is possible to make the beam diameter narrowed by the scanning lens smaller.

[0068] Here, if the concave lens 60 is moved to the right in the optical axis direction, the light emitted from the convex lens 61 becomes divergent light, and near the container 1, the focus 30 changes from the top 1A to the bottom 1B direction. Note that the same effect is obtained even if the convex lens 61 is moved in the optical axis direction.

[0069] In the present embodiment, based on the outputs of the stereo cameras 26a and 26b, the position of the convex or concave portion of the base material 1a and the distance to the convex or concave portion of the base material 1a are detected, and based on the detection result, the concave lens 60 or the convex lens 61 can be controlled to move in the optical axis direction.

[0070] The beam expander 23 shown in FIG. 10(b) includes a parallel plate 62 that can be inserted between the concave lens 60 and the convex lens 61 in addition to the configuration shown in FIG. 10(a).

[0071] If the parallel plate 62 is inserted, the light emitted from the positive lens 61 becomes convergent light, and near the container 1, the focus 30 changes from the bottom 1B to the top 1A direction. By providing a plurality of parallel plates 62, it is possible to correspond to various foci 30. Further, the parallel plate 62 may be inserted into the convergent or divergent light portion, and the same effect can be obtained even if it is not inside the beam expander 23.

[0072] In this embodiment, based on the outputs of the stereo cameras 26a and 26b, the position of the convex or concave portion of the base material 1a and the distance to the convex or concave portion of the base material 1a are detected, and based on the detection result, the insertion and extraction of the parallel flat plate 62 can be controlled.

[0073] The beam expander 23 shown in FIG. 10(c) includes a concave lens 63 and a convex lens 64, and is adjusted so that the light beam emitted from the convex lens 64 becomes a divergent light beam. If the beam expander 23 shown in FIG. 10(a) is replaced with the beam expander 23 shown in FIG. 10(c), the focal point 30 changes from the top 1A to the bottom 1B direction in the vicinity of the container 1. A beam expander 23 corresponding to various focal positions may be provided.

[0074] In this embodiment, based on the outputs of the stereo cameras 26a and 26b, the position of the convex or concave portion of the base material 1a and the distance to the convex or concave portion of the base material 1a are detected, and based on the detection result, the replacement of the beam expander 23 can be controlled.

[0075] FIG. 11 is a diagram for explaining a modified example of the manufacturing apparatus according to this embodiment. The manufacturing apparatus 500 shown in FIG. 11 has a line that moves from right to left, and includes a first mounting portion 300 for mounting a laser irradiation portion on this line, and a second mounting portion 400 for mounting the stereo cameras 26a and 26b. In this way, by mounting the stereo cameras 26a and 26b and the laser irradiation portion 20 separately, the base material 1a on which the pattern 11 is formed can be mass-produced at high speed.

[0076] In this case, the reference positions detected by the stereo cameras 26a and 26b are determined in advance at the center of the base material 1a, the holding plate 29, etc., and by matching this with the reference of the laser irradiation, the laser irradiation position can be determined with high accuracy.

[0077] FIG. 12 is a diagram for explaining the first and second mounting parts in the modification shown in FIG. 11. The first mounting part 300 shown in FIG. 12(a) includes a holding part 330 on columns 310 and 320, and mounts the laser irradiation part 20a. The laser irradiation part 20 shown in FIG. 5 includes stereo cameras 26a and 26b, but the laser irradiation part 20a shown in FIG. 12(a) is configured by removing the stereo cameras 26a and 26b from the laser irradiation part 20.

[0078] The second mounting part 400 shown in FIG. 12(b) includes a holding part 330 on columns 310 and 320, and mounts the stereo camera 41. The stereo camera 41 is configured in the same manner as the stereo cameras 26a and 26b shown in FIG. 5.

[0079] FIG. 13 is a diagram for explaining the laser irradiation direction in the modification shown in FIG. 11. When the side part 1C becomes a shadow of the convex part with respect to the laser irradiation part 20a, the laser is not irradiated and the pattern 11 is not formed. Therefore, as shown in FIGS. 13(a) and (b), by moving the laser irradiation part 20a in a direction perpendicular to the flow of the line (the left - right direction in the figure) with respect to the holding plate 29, the laser can be irradiated to all the side parts 1C to form the pattern 11.

[0080] Similarly, as shown in FIG. 13(c), by moving the laser irradiation part 20a in a direction perpendicular to the flow of the line (the left - right direction in the figure) with respect to the holding plate 29, the laser can be irradiated to all the bottom parts 1B to form the pattern 11.

[0081] Note that instead of FIGS. 13(a) to (c), the holding plate 29 may be moved in a direction perpendicular to the flow of the line with respect to the laser irradiation part 20a.

[0082] In the description so far, the storage container 1 has been described as being fixed by the holding portion 28. However, by determining the reference in the rotational direction and rotating the storage container 1 with respect to the holding portion 28, the convex portions and concave portions for one full rotation in the rotational direction of the storage container 1 may be detected by the stereo camera 26, and the focus 30 of the laser beam may be set at the midpoint between the detected convex portions and concave portions. In this case, since laser irradiation is performed while rotating, laser irradiation can be performed over the entire circumference of the storage container 1, and the pattern 11 can be formed.

[0083] FIG. 14 is a diagram showing a modified example of the storage container according to the present embodiment. The storage container 1 shown in FIG. 14(a) includes a plurality of bottom portions 1B, and all of the plurality of bottom portions 1B are the pattern regions 13 where the pattern 11 is formed. On the other hand, the storage container 1 includes a plurality of top portions 1A and a plurality of side portions 1C, but all of the plurality of top portions 1A and the plurality of side portions 1C are non-pattern regions 12 where the pattern 11 is not formed. In this case, it is preferable to perform laser irradiation with the setting of FIG. 9(3).

[0084] The storage container 1 shown in FIG. 14(b) includes a plurality of side portions 1C, and all of the plurality of side portions 1C are the pattern regions 13 where the pattern 11 is formed. On the other hand, the storage container 1 includes a plurality of top portions 1A and a plurality of bottom portions 1B, but all of the plurality of top portions 1A and the plurality of bottom portions 1B are non-pattern regions 12 where the pattern 11 is not formed. In this case, it is preferable to perform laser irradiation with the setting of FIG. 9(2).

[0085] The storage container 1 shown in FIG. 14(c) includes a plurality of top portions 1A, and all of the plurality of top portions 1A are the pattern regions 13 where the pattern 11 is formed. On the other hand, the storage container 1 includes a plurality of top portions 1A and a plurality of bottom portions 1B, but all of the plurality of top portions 1A and the plurality of bottom portions 1B are non-pattern regions 12 where the pattern 11 is not formed. In this case, it is preferable to perform laser irradiation with the setting of FIG. 9(1).

[0086] The container 1 shown in FIG. 14(d) includes a plurality of tops 1A, a plurality of bottoms 1B, and a plurality of sides 1C. Two adjacent tops 1A and the bottom 1B therebetween form a pattern area 13 where a pattern 11 is formed. The other tops 1A and bottoms 1B, and all of the plurality of sides 1C are non-pattern areas 12 where the pattern 11 is not formed. In FIG. 14(d), the pattern 11 is formed across two tops 1A and one bottom 1B, but the pattern 11 may be formed across two or more of the tops 1A, bottoms 1B, and sides 1C. In this case, it is preferable to perform laser irradiation with the setting of FIG. 9(6).

[0087] FIG. 15 is a diagram showing a second modification of the container according to the present embodiment. The container 1 shown in FIG. 15(a) includes a plurality of convex tops 1A, and one of the plurality of tops 1A includes a concave portion 51 formed by embossing.

[0088] The container 1 shown in FIG. 15(b) includes a plurality of convex tops 1A, and one of the plurality of tops 1A includes a convex portion 52 formed by embossing.

[0089] The concave portion 51 shown in FIG. 15(a) and the convex portion 52 shown in FIG. 15(b) each include a pattern area 13 where a pattern 11 including a line surrounding the periphery of the characters is formed, as shown in FIGS. 15(c) and 15(d). The concave portion 51 and the convex portion 52 are rectangular, but the shape is not particularly limited, and circular, polygonal, etc. shapes are appropriately applied.

[0090] The pattern 11 shown in FIG. 15(d) has the right and bottom lines surrounding the periphery of the characters made thick with respect to the pattern 11 shown in FIG. 15(c). This makes the characters included in the pattern 11 appear three-dimensional.

[0091] FIG. 16 is a diagram showing a third modification of the container according to the present embodiment. The container 1 shown in FIGS. 16(a) and 16(b) includes a reference plane 1D and an embossed portion 1E formed by embossing, and houses the object 1b to be housed. As described above, the container 1 and the object 1b to be housed constitute a housing body. The embossed portion 1E is constituted by a convex portion protruding from the reference plane 1D or a concave portion recessed from the reference plane 1D. In FIG. 16(a), a rounded rectangular convex portion or concave portion is shown, and in FIG. 16(b), a star-shaped convex portion or concave portion is shown. However, the shape is not particularly limited, and a circular shape, a polygon, etc. are appropriately applied.

[0092] The embossed portion 1E is formed in a graphic shape and includes a pattern area 13 in which a pattern 11 is formed inside the embossed portion 1E. On the other hand, the reference plane 1D is a non-pattern area 12 where the pattern 11 is not formed.

[0093] FIG. 17 is a diagram showing a fourth modification of the container according to the present embodiment. The container 1 shown in FIG. 17 includes a reference plane 1D and an embossed portion 1E, and houses the object 1b to be housed. The embossed portion 1E in FIG. 17 is a convex portion or a concave portion. The embossed portion 1E is formed in a character shape, and a pattern area 13 in which a pattern 11 is formed along the shape 1E of the embossed portion is inside the embossed portion 1E. The pattern 11 is formed in a shape similar to the character shape in which the embossed portion 1E is formed. On the other hand, the reference plane 1D is a non-pattern area 12 where the pattern 11 is not formed. That is, a pattern is formed in the portion along the convex portion or the concave portion. In FIG. 17, when the pattern 11 is formed inside the embossed portion 1E, the characters are more visible than when only one of the embossed portion or the pattern is present.

[0094] FIG. 18 is a view showing a fifth modification of the storage container according to the present embodiment. The storage container 1 shown in FIG. 18 includes a reference plane 1D and an embossed portion 1E, and houses the object 1b to be stored. The embossed portion 1E in FIG. 18 is a convex-shaped portion. The embossed portion 1E is formed in a character shape, and is a pattern region 13 in which a pattern 11 is formed outside the embossed portion 1E. Unlike FIG. 17, in FIG. 18, since a pattern region is formed outside the embossed portion 1E, a shadow is formed on the outside and it is three-dimensionally expressed. The pattern 11 has a shape similar to the character shape in which the embossed portion 1E is formed, and is formed so as to represent a shadow around the character shape in which the embossed portion 1E is formed. On the other hand, the reference plane 1D is a non-pattern region 12 where the pattern 11 is not formed. The pattern 11 is formed around the convex-shaped portion.

[0095] FIG. 19 is a view showing a sixth modification of the storage container according to the present embodiment. The storage container 1 shown in FIGS. 19(a) to 19(d) includes a reference plane 1D and an embossed portion 1E, and houses the object 1b to be stored. The embossed portion 1E in FIG. 19 is a convex-shaped portion or a concave-shaped portion. The embossed portion 1E is formed in a character shape, and is a pattern region 13 in which a pattern 11 is formed along the shape of the embossed portion 1E inside the embossed portion 1E. On the other hand, the reference plane 1D is a non-pattern region 12 where the pattern 11 is not formed. That is, a pattern is formed in a portion along the convex-shaped portion or the concave-shaped portion.

[0096] The pattern 11 is formed so as to fill the character shape formed by the embossed portion 1E. FIG. 19(a) shows a solid-painted pattern 11, FIG. 19(b) shows a checkered pattern 11, FIG. 19(c) shows a hatched pattern 11, and FIG. 19(d) shows a polka-dot pattern 11.

[0097] FIG. 20 is a view showing a seventh modification of the container according to the present embodiment. The container 1 shown in FIG. 20 includes a reference surface 1D and an embossed portion 1E, and houses the object 1b to be housed. The embossed portion 1E in FIG. 20 is a concave portion. The embossed portion 1E is formed in a character shape and is a non-pattern area 12 where the pattern 11 is not formed. On the other hand, the reference surface 1D is a pattern area 13 where the pattern 11 is formed around the embossed portion 1E. The pattern 11 is formed in a shape similar to the character shape in which the embossed portion 1E is formed, and is formed so as to surround and border the outer periphery of the character shape in which the embossed portion 1E is formed. The pattern 11 is formed around the concave portion.

[0098] FIG. 21 is a view showing an eighth modification of the container according to the present embodiment. The container 1 shown in FIG. 21 includes a reference surface 1D and an embossed portion 1E, and houses the object 1b to be housed. The embossed portion 1E in FIG. 21 is a convex portion or a concave portion. The embossed portion 1E is formed in a graphic shape and is a non-pattern area 12 where the pattern 11 is not formed. On the other hand, the reference surface 1D is a pattern area 13 where the pattern 11 is formed around the embossed portion 1E. The pattern 11 is formed in a shape similar to the graphic shape in which the embossed portion 1E is formed, and is formed so as to surround the outer periphery of the graphic shape in which the embossed portion 1E is formed. That is, a pattern is formed on the portion along the convex portion or the concave portion. Although FIG. 21 shows a star-shaped convex portion or concave portion, the shape is not particularly limited, and a circular shape, a polygonal shape, etc. are appropriately applied.

[0099] FIG. 22 is a view showing a ninth modification of the container according to the present embodiment. The container 1 shown in FIG. 22 includes a reference surface 1D and an embossed portion 1E, and houses the object 1b to be housed. The embossed portion 1E in FIG. 22 is a convex portion or a concave portion. The embossed portion 1E is formed in a character shape and is a pattern area 13 where the pattern 11 is formed inside the embossed portion 1E. The reference surface 1D is also a pattern area 13 where the pattern 11 is formed around the embossed portion 1E.

[0100] The pattern 11 in the embossing part 1E is formed as a checker pattern so as to fill in the character shape formed by the embossing part 1E. The pattern 11 on the reference surface 1D is formed in a shape similar to the character shape formed by the embossing part 1E, and is formed so as to border and surround the outer periphery of the character shape formed by the embossing part 1E. That is, the pattern is formed on the part along the convex-shaped part or the concave-shaped part.

[0101] FIG. 23 is a diagram showing a tenth modification of the container according to the present embodiment. The container 1 shown in FIG. 23 includes a reference surface 1D and an embossing part 1E, and houses the object 1b to be housed. The embossing part 1E in FIG. 23 is a convex-shaped part or a concave-shaped part. The embossing part 1E is formed in a graphic shape, and is a pattern area 13 in which a pattern 11 is formed inside the embossing part 1E. The reference surface 1D is also a pattern area 13 in which a pattern 11 is formed around the embossing part 1E.

[0102] The pattern 11 in the embossing part 1E is formed by solid filling so as to fill in the graphic shape formed by the embossing part 1E. The pattern 11 on the reference surface 1D is formed in a shape similar to the graphic shape formed by the embossing part 1E, and is formed by solid filling surrounding the outer periphery of the graphic shape formed by the embossing part 1E. That is, the pattern is formed on the part along the convex-shaped part or the concave-shaped part.

[0103] FIG. 24 is a diagram showing an eleventh modification of the container according to the present embodiment. The container 1 shown in FIG. 24 includes a reference surface 1D and an embossing part 1E, and houses the object 1b to be housed. The embossing part 1E in FIG. 24 is a convex-shaped part or a concave-shaped part. The embossing part 1E is formed in a graphic shape, and is a pattern area 13 in which a pattern 11 is formed inside. The reference surface 1D is also a pattern area 13 in which a pattern 11 overlapping the embossing part 1E is formed.

[0104] The pattern 11 in the embossing part 1E is formed by solid filling so as to cover the graphic shape in which the embossing part 1E is formed. The pattern 11 on the reference surface 1D is formed in a shape similar to the graphic shape in which the embossing part 1E is formed and overlaps with the graphic shape in which the embossing part 1E is formed. The pattern 11 is formed across at least the periphery of the convex-shaped part or the periphery of the concave-shaped part.

[0105] In addition, in the embodiment, an example in which the container is cylindrical has been shown, but the container is not limited to this, and it may be a box-shaped container, a cone-shaped container, or the like.

[0106] Also, regarding the object to be contained in the container 1, by increasing the contrast of the pattern with respect to the color of the object to be contained in the container having transparency to visible light, it is possible to provide a pattern with good visibility and a large amount of information. For example, when the object to be contained is black, if a pattern whitened in the container is formed, the pattern becomes easier to visually recognize. When the object to be contained is white, if a pattern blackened in the container is formed, the pattern becomes easier to visually recognize.

[0107] Also, the shape of the container may be any shape such as a columnar shape or a quadrangular prism without a shoulder part and an inclined part. Also, the content of the container may be of any color, and may be anything that can be put into the container, such as something cold or warm, carbonated, colloidal (such as yogurt), etc. The content is, for example, coffee, tea, beer, water, juice, carbonated beverage, milk, etc., but is not limited to this, and may be anything that can be put into the container.

[0108] Also, according to the content of the container, the processing state can be changed. For example, according to the content of the container, whitening or clouding can be adjusted by adjusting the laser intensity or the like to change the processing state and control the shading.

[0109] Further, dot portions may be formed in accordance with the shape of the embossing of the PET bottle. Furthermore, the above-described inclined processing may be used in combination to process the uneven contours, interior, and outer periphery.

[0110] ● Summary ● As described above, a manufacturing apparatus 500, which is an example of a pattern forming apparatus for a base material 1a according to an embodiment of the present invention, includes a holding portion 28 that holds the base material 1a in which a convex-shaped portion or a concave-shaped portion is formed, and a laser irradiation portion 20 as an example of a pattern forming portion that forms a pattern 11 on the base material 1a. The pattern 11 is formed in at least one or more of a convex-shaped portion, a concave-shaped portion, around the convex-shaped portion or around the concave-shaped portion, and a portion along the convex-shaped portion or the concave-shaped portion.

[0111] Thereby, since the convex-shaped portion or the concave-shaped portion and the pattern 11 can be visually recognized as a set, the visibility of the pattern 11 is improved compared to the case of forming the pattern on a uniform plane, or the convex-shaped portion or the concave-shaped portion is emphasized and the design property is improved compared to the case of not forming the pattern. When the pattern 11 is formed around the convex-shaped portion or around the concave-shaped portion, the pattern 11 is arranged adjacent to or in the vicinity with a predetermined width with respect to the periphery of the convex-shaped portion or the concave-shaped portion, and is formed surrounding the periphery of the convex-shaped portion or the concave-shaped portion. Thereby, the convex-shaped portion or the concave-shaped portion is emphasized. When the pattern 11 is arranged in the vicinity with a predetermined width with respect to the periphery of the convex-shaped portion or the concave-shaped portion, the predetermined width is preferably sufficiently smaller than the convex-shaped portion or the concave-shaped portion.

[0112] The laser irradiation portion 20 forms the pattern 11 on the top 1A of the convex-shaped portion, the side portion 1C of the convex-shaped portion, the bottom 1B of the concave-shaped portion, the side portion 1C of the concave-shaped portion, around the convex-shaped portion, or around the concave-shaped portion. The laser irradiation portion 20 may form the pattern 11 across two or more of the top 1A of the convex-shaped portion, the side portion 1C of the convex-shaped portion, the bottom 1B of the concave-shaped portion, the side portion 1C of the concave-shaped portion, around the convex-shaped portion, and around the concave-shaped portion.

[0113] As a result, various variations of the shape can be visually recognized together with the pattern 11, improving the visibility of the pattern 11 or the design quality of the convex or concave portions.

[0114] The laser irradiation unit 20 can easily form the pattern 11 by forming the pattern 11 through laser irradiation.

[0115] The pattern 11 is composed of an aggregate of dot portions 110, and the laser irradiation unit 20 forms the dot portions 110 by laser irradiation. As a result, it is possible to easily form the pattern 11 with good visibility or that emphasizes the convex or concave portions.

[0116] The laser irradiation unit 20 changes the laser focus 30 by means of the beam expander 23. This makes it possible to reduce fluctuations in the laser beam diameter (spot diameter) at the position where the pattern 11 is formed, regardless of whether it is a convex portion, a concave portion, the periphery of a convex portion, or the periphery of a concave portion, and reduces variations in the quality of the pattern 11.

[0117] The laser irradiation unit 20 changes the laser light quantity. As a result, even when the laser beam diameter (spot diameter) increases due to a shift in the laser focus position, by increasing the laser light quantity, fluctuations in the laser irradiation energy per unit area are reduced, and variations in the quality of the pattern are reduced.

[0118] The laser irradiation unit 20 changes the direction in which the laser is irradiated. This makes it possible to surely form the pattern, regardless of whether it is a convex portion, a concave portion, the periphery of a convex portion, or the periphery of a concave portion.

[0119] The manufacturing apparatus 500 includes a stereo camera 26, which is an example of a position detection unit that detects the position of the convex or concave portion. This makes it possible to surely form the pattern 11 around the convex portion, the concave portion, the periphery of the convex portion, or the periphery of the concave portion.

[0120] The manufacturing apparatus 500 includes a stereo camera 26 which is an example of a distance detection unit that detects the distance to a convex portion or a concave portion. Thereby, variations in the quality of the pattern 11 due to variations in the laser optical path length are reduced in any case of a convex portion, a concave portion, the periphery of the convex portion, or the periphery of the concave portion.

[0121] A method for forming a pattern on a substrate according to an embodiment of the present invention includes a preparation step of preparing a substrate on which a convex portion or a concave portion is formed, and a pattern forming step of forming a pattern 11 on at least one or more of a convex portion, a concave portion, the periphery of the convex portion or the periphery of the concave portion, and a portion along the convex portion or the concave portion.

[0122] The substrate 1a of the container 1 according to an embodiment of the present invention is a substrate 1a on which a convex portion or a concave portion is formed, and a pattern 11 is formed on at least one or more of a convex portion, a concave portion, the periphery of the convex portion or the periphery of the concave portion, and a portion along the convex portion or the concave portion. The pattern 11 is formed across two or more of the top of the convex portion, the side of the convex portion, the bottom of the concave portion, the side of the concave portion, the periphery of the convex portion, and the periphery of the concave portion. The convex portion and the concave portion are formed by embossing.

Description of Reference Numerals

[0123] 1 Container 1a Substrate 1b Contained Object 1A Top (a part of the convex portion) 1B Bottom (a part of the concave portion) 1C Side (a part of the convex portion or the concave portion) 1D Reference Plane 1E Embossed Portion (convex portion or concave portion) 2 Cap 11 Pattern 110 Dot Portion (a predetermined shape, an example of a dot) 111 Concave Portion (an example of a predetermined concave portion) 1111 First Inclined Plane 1112 Bottom 112 Protrusion (an example of a specified protrusion) 1121 Top 1122 Second inclined surface 113 Concavo-convex portion 12 Non-pattern region (an example of a second region) 13 Pattern region (an example of a first region) 20 Laser irradiation unit (pattern formation unit) 21 Laser light source 22 Laser light 23 Beam expander 24 Scanning unit 25 Scanning lens 26 Stereo camera (an example of a position detection unit and a distance detection unit) 27 Laser light 28 Holding unit 29 Holding plate 30 Focus 31, 32 Spot diameter 300 First mounting part 400 Second mounting part 500 Manufacturing apparatus A Region B Perspective view dp Depth Dc Concave width Dr Annular width h Height W Dot width

Prior art documents

Patent documents

[0124]

Patent Document 1

Claims

1. A holding part for holding a substrate on which a convex part and a concave part are formed; A pattern forming part for forming a pattern on the substrate, and includes: The pattern forming part forms the pattern by laser irradiation across the top of the convex part, the bottom of the concave part, and the side part of the convex part or the concave part. The pattern forming part is a pattern forming apparatus for a substrate to be laser-irradiated such that the laser focus position is near the side part of the convex part or the concave part.

2. The pattern is composed of an aggregate of dots, and the pattern forming part is a pattern forming apparatus for a substrate according to Claim 1, which forms the dots by laser irradiation.

3. The pattern forming part is a pattern forming apparatus for a substrate according to Claim 1 or 2, which changes the laser focus position.

4. The pattern forming part is a pattern forming apparatus for a substrate according to Claim 3, which changes the laser light quantity.

5. The pattern forming part is a pattern forming apparatus for a substrate according to any one of Claims 1 to 4, which changes the direction of laser irradiation.

6. A pattern forming apparatus for a substrate according to any one of Claims 1 to 5, which includes a position detection part for detecting the position of the convex part or the concave part.

7. A pattern forming apparatus according to Claim 6, which includes a distance detection part for detecting the distance to the convex part or the concave part.

8. A substrate pattern forming method including: a preparation step of preparing a substrate on which a convex part and a concave part are formed; A pattern forming step of forming a pattern by laser irradiation across the top of the convex part, the bottom of the concave part, and the side part of the convex part or the concave part; and includes: In the pattern forming step, the laser focus position is near the side part of the convex part or the concave part.

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