JP2019064883A - Glass and method for manufacturing the same - Google Patents

Abstract

To provide a glass that is hardly damaged, and a method for manufacturing the glass.SOLUTION: A glass comprises: a first principal surface 1a and a second principal surface 1b opposite to each other; and a side surface 1c that links the first principal surface 1a and the second principal surface 1b. The side surface 1c has a modified part 2 over 50% or more in a thickness direction, and the modified part 2 does not reach the first principal surface 1a and the second principal surface 1b.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a glass and a method of manufacturing the same.

  In digital cameras and the like, solid-state imaging devices such as CCDs and CMOSs are used. Since these solid-state imaging devices have a wide range of light receiving sensitivities, it is necessary to remove light in the infrared region in order to match human vision. Therefore, a resin film that absorbs infrared light, a film that absorbs infrared light, a glass provided with a film that reflects infrared light, and an infrared-absorbing glass are used for the solid-state imaging device.

  These glasses are sized as desired by dividing the matrix. Conventionally, division of the base material has been performed using a dicing blade. However, in the case of this method, there has been a tendency for the microcracks to extend in the plane direction in the cut surface. Therefore, there is a problem that the glass is easily broken.

  As a method for solving this problem, Patent Document 1 below discloses a manufacturing method in which a modified region is formed inside a base material and the base material is divided along the modified region.

WO 2015/046088

  In the manufacturing method described in Patent Document 1, micro cracks extending in the surface direction are less likely to occur. However, the edge portion of the divided glass tends to have a wave-like shape with a short period, and there is a possibility that the glass tends to be broken starting from the wave-like unevenness. In particular, in the case of the infrared absorbing glass, the problem of being prone to cracking was remarkable.

  An object of the present invention is to provide a glass that is resistant to breakage and a method of manufacturing the same.

  The glass of the present invention has a first main surface and a second main surface facing each other, and a side surface connecting the first main surface and the second main surface, and 50% of the side surface in the thickness direction The present invention is characterized in that the reforming section is provided as described above, and the reforming section does not reach the first main surface and the second main surface.

A first edge which is an edge of the first main surface has a wave-like shape in plan view, and an average value of wave numbers in the wave-like shape of the first edge is 1 mm ⁻¹ or less Is preferred.

A glass according to another aspect of the present invention has a first main surface and a second main surface facing each other, and a side surface connecting the first main surface and the second main surface, The first edge which is the edge of the surface has a wave-like shape in plan view, and the average value of the wave numbers in the wave-like shape of the first edge is 1 mm ⁻¹ or less It features.

The second edge which is the edge of the second main surface has a wavelike shape in plan view, and the wavelike shape of the first edge and the wavelike shape of the second edge It is preferable that the average value of the wave number in both of is 1 mm <^-1> or less.

  In the thickness direction, it is preferable that at least 50% of the side surfaces be provided with a reformed portion, and the reformed portion does not reach the first main surface and the second main surface.

  In the thickness direction, it is more preferable that 60% or more of the side surface is provided with a reformed portion, and the reformed portion does not reach the first main surface and the second main surface.

  It is preferable that the center of the side surface in the thickness direction and the center of the reformed portion in the thickness direction be at the same position.

  The thickness is preferably 0.3 mm or less.

  It is preferred that the glass is an infrared absorbing glass.

  The bending strength is preferably 100 MPa or more.

  The method for producing a glass according to the present invention comprises the steps of preparing a glass base material having a first main surface and a second main surface facing each other, and irradiating the base material with laser light to obtain the inside of the base material. And a step of cutting the base material along a portion where the reforming portion is provided, and in the step of providing the reforming portion, the reforming portion includes the first main surface and the second main surface. The modified portion is provided at 50% or more in the thickness direction of the base material so as not to reach the main surface of the substrate.

  In the step of providing the reforming portion, it is preferable to provide the reforming portion at 60% or more in the thickness direction of the base material.

  In the step of providing the reforming portion, it is preferable to provide the reforming portion so that the center of the base material in the thickness direction of the base material and the center of the reforming portion in the thickness direction of the base material are at the same position.

  The glass is preferably an infrared absorbing glass.

  According to the present invention, it is possible to provide a glass that is resistant to breakage and a method for producing the same.

It is a typical perspective view showing glass of a 1st embodiment of the present invention. It is a typical enlarged plan view which shows the glass of the 1st Embodiment of this invention. (A) And (b) is typical sectional drawing for demonstrating an example of the manufacturing method of the glass which concerns on the 1st Embodiment of this invention. (A) And (b) is typical sectional drawing for demonstrating an example of the manufacturing method of the glass which concerns on the 1st Embodiment of this invention.

  Hereinafter, preferred embodiments will be described. However, the following embodiments are merely examples, and the present invention is not limited to these embodiments. In each drawing, members having substantially the same functions may be referred to by the same reference numerals.

(Glass)
First Embodiment
FIG. 1 is a schematic perspective view showing a glass of a first embodiment of the present invention. As shown in FIG. 1, the glass 10 has the 1st main surface 1a and 2nd main surface 1b which oppose, and the side 1c which connects the 1st main surface 1a and the 2nd main surface 1b. . The reforming unit 2 is provided on the side surface 1c. Here, the modified portion refers to a portion in which a change has occurred in the refractive index, the structure, or the like of the glass due to the irradiation of a laser beam or the like. The glass 10 is an infrared absorbing glass. Infrared absorbing glass is generally susceptible to cracking.

  In the present embodiment, the reforming unit 2 is provided on the side surface 1c in the thickness direction, and does not reach the first main surface 1a and the second main surface 1b. Thereby, when the base material is cut along the portion provided with the reforming portion 2 to obtain the glass 10, a crack is generated starting from the reforming portion 2 and the generated crack is in the thickness direction of the base material Since it extends, it is possible to suppress the occurrence of microcracks extending in the surface direction at the first end edge 1d and the second end edge 1e. The surface direction is the direction in which the first main surface 1a or the second main surface 1b extends.

  Further, by providing the reformed portion 2 in 50% or more of the side surface 1c in the thickness direction, the distance between the reformed portion 2 and the first main surface 1a or the second main surface 1b is shortened. Therefore, the edge part of the divided glass tends to have a wave-like shape with a long cycle, and it is possible to suppress the occurrence of the glass breakage starting from the wave-like unevenness. Therefore, even if it is infrared absorption glass which generally tends to produce a crack, breakage can be controlled.

  In addition, it is preferable that the modification part 2 is provided in 60% or more of the side surface 1c in the thickness direction. Thereby, the glass 10 can be made more resistant to breakage. The reformer 2 is preferably provided at 99% or less of the side surface 1 c in the thickness direction. When the modified portion 2 reaches the first main surface 1a or the second main surface 1b, a crack is easily generated on the first main surface 1a or the second main surface 1b, and the glass 10 is broken. It becomes easy to do.

  It is preferable that the center of the side surface 1c in the thickness direction and the center of the modified portion 2 in the thickness direction be at the same position. Thereby, the glass 10 can be made more resistant to breakage. The center of the side surface 1c in the thickness direction may be different from the center of the reformed portion 2 in the thickness direction.

FIG. 2 is a schematic enlarged plan view showing the glass of the first embodiment. The glass 10 is produced by cleaving a base material. Therefore, as shown in FIG. 2, the first end edge 1 d which is the end edge of the first main surface 1 a has a wavy shape in plan view. Here, one set of unevenness as shown by the arrow A in FIG. 2 is taken as one wave, and the number of waves per unit length is taken as the wave number (mm ⁻¹ ). In the present embodiment, the average value of the wavenumbers of the first edge 1 d is 1 mm ⁻¹ or less. As described above, since the interval between the concavities and convexities is long at the first end edge portion 1d and the shape of the first end edge portion 1d is close to a straight line, it is difficult for the glass 10 to be a starting point of cracking.

Furthermore, the second end 1e which is the end of the second main surface 1b shown in FIG. 1 also has a wavy shape in plan view, and the average value of the wavenumbers of the second end 1e is It is 1 mm ^-1 or less. Therefore, the glass 10 is more difficult to break.

The average value of the wave numbers of the first edge 1 d and the second edge 1 e is preferably 0.8 mm ⁻¹ or less, and more preferably 0.5 mm ⁻¹ or less. As a result, the shapes of the first end edge 1d and the second end edge 1e can be made closer to straight lines, and the glass 10 is more difficult to break.

  The thickness of the glass 10 is preferably 0.3 mm or less, 0.2 mm or less, particularly 0.18 mm or less. Moreover, it is preferable that the glass 10 is infrared rays absorption glass. In this case, the structure of the present invention is particularly preferable because it can be made difficult to break although it is generally easy to break.

  Hereinafter, details of the material constituting the infrared absorbing glass will be described.

  As an infrared rays absorption glass, the glass plate which consists of a sulfate phosphate glass, fluorophosphate glass, phosphate glass etc. is mentioned, for example. In particular, sulfated phosphate glass, fluorophosphate glass, and phosphate glass containing CuO are preferably used.

Although a known glass composition used as infrared absorbing glass can be used as the sulfurized phosphate glass, specifically, P ₂ O ₅ 20% to 70%, SO ₃ 1% to 25% by mass% Glass containing 10% to 50% ZnO and 1% to 30% R ₂ O (where R is any of Li, Na and K) can be used.

The fluorophosphate salt-based glass, but may be any known glass compositions used as an infrared absorbing glass, specifically, ^F anionic% - a ^{5% ~70% O 2- 30%} ~95% , Cation% P 5 ⁺ 20% to 50%, Al ^{3 +} 0.2% to 20%, R ⁺ 1% to 30% (R is any of Li, Na, K), R ' ²⁺ 1% to 50% A glass containing a basic composition of (R ′ is any of Zn, Mg, Ca, Sr, and Ba) can be used.

Although a known glass composition used as infrared absorbing glass can be used as the phosphate glass, specifically, 20% to 70% of P ₂ O _{5 and} 1% of Al ₂ O ₃ by weight% 20%, R ₂ O 0% to 30% (R is any of Li, Na, K), R'O 0% to 40% (R 'is any of Zn, Mg, Ca, Sr, or Ba) Glass containing the basic composition can be used.

  The content of CuO in each of the above glasses is preferably 0.1 parts by mass to 15 parts by mass, and more preferably 0.5 parts by mass to 10 parts by mass with respect to 100 parts by mass of the base glass. More preferably, it is 2 parts by mass to 8 parts by mass. If the content of CuO is too small, the infrared absorption performance may be insufficient. If the content of CuO is too large, the visible light transmittance may decrease or may not be vitrified.

(Production method)
Hereinafter, an example of the manufacturing method of the glass 10 which concerns on 1st Embodiment is demonstrated.

  FIGS. 3A and 3B are schematic cross-sectional views for explaining an example of the method for producing glass according to the first embodiment of the present invention. FIG. 4A and FIG. 4B are schematic cross-sectional views for explaining an example of the method for producing glass according to the first embodiment of the present invention. The directions z in FIGS. 3A and 3B and FIGS. 4A and 4B indicate the thickness direction. The direction x and the direction y indicate the respective directions of the surface direction. 3A and 3B are cross-sectional views as viewed from the x direction, and FIGS. 4A and 4B are cross-sectional views as viewed from the y direction perpendicular to the x direction.

  As shown in FIG. 3A, a glass base material 20 is prepared. Next, as shown in FIG. 3B, the laser light L is scanned and irradiated along the portion where the base material 20 is divided. The laser light L is irradiated so that the position of the focal point is inside the base material 20. Thus, the reforming unit 2 is provided inside the base material 20. The reforming unit 2 is provided at 50% or more in the thickness direction z of the base material 20. In the present embodiment, one reformer 2 is provided in the thickness direction z. In addition, by adjusting the irradiation intensity, the irradiation time, the condensing width, and the number of scans, the modified portion 2 can be provided 50% or more in the thickness direction z of the base material 20. In addition, the modifying unit 2 may be provided by scanning the laser light L a plurality of times, or the modifying unit 2 may be provided by one scanning of the laser beam L.

  The reformer 2 is more preferably provided at 60% or more in the thickness direction z of the base material 20. Although FIG. 3B shows the reformed portion 2 extending in the y direction, the reformed portion 2 extending in the x direction is similarly provided.

  On the other hand, as shown to Fig.4 (a), the support body 21 used for cutting of the base material 20 is prepared. Although the structure of the support body 21 is not specifically limited, the support body 21 has a resin film and the adhesive layer provided on the resin film. Next, the base material 20 is attached to the pressure-sensitive adhesive layer of the support 21.

  Next, the pressing member 22 is disposed on the side of the support 21 so as to overlap the region of the base material 20 where the reforming unit 2 is provided in plan view. The pressing member 22 is a member for cutting the base material 20, and has a blade 23 extending linearly in the y direction. Next, the base material 20 is pressed from the support 21 side by moving the pressing member 22 to the base material 20 side. Specifically, the region of the base material 20 provided with the reforming unit 2 is indirectly pressed by the blade 23 through the support 21. Thereby, as shown in FIG. 4B, the base material 20 is cut in the thickness direction z along the reforming section 2. Similarly, the base material 20 is cut along each reforming section 2.

  In the present embodiment, since the base material 20 is cut as described above, microcracks extending in the x direction or the y direction are unlikely to occur. Therefore, the glass 10 is less likely to be broken.

  The reforming unit 2 is provided at 60% or more in the thickness direction z of the base material 20. Thereby, the distance of the both main surfaces of base material 20 and modification part 2 can be shortened effectively. However, even when the reformed portion 2 is provided 50% or more in the thickness direction z, the distance between both main surfaces of the base material 20 and the reformed portion 2 can be sufficiently shortened. In addition, in the thickness direction z of the base material 20, all except the region between both main surfaces and the reforming portion 2 are the reformed portion 2. Therefore, it is possible to cut more stably. Thereby, the said wave number in 1st edge part 1d after cutting and 2nd edge part 1e shown in FIG. 1 can be made small. Therefore, the shapes of the first end 1d and the second end 1e can be made close to the straight line in which the modified portion 2 extends. Therefore, it is hard to produce the part used as the origin of a crack, and the glass 10 is further hard to be damaged.

  In the process of providing the reforming unit 2, the reforming unit 2 is configured so that the center of the base material 20 in the thickness direction z and the center of the reforming unit 2 in the thickness direction z are at the same position. It is more preferable to provide. As a result, the distance between both main surfaces of the base material 20 and the reforming portion 2 can be more reliably shortened. Therefore, breakage of the glass 10 can be made more difficult to occur more reliably.

<Example and Comparative Example>
Example 1
By irradiating a laser beam to a base material having a thickness of 0.10 mm, a reformed part was provided inside the base material. The reformed portion was provided at 50% in the thickness direction of the base material. Next, the base material was cut along the area where the reforming section was provided. This obtained the infrared rays absorption glass whose main surface is a size of 6 mm x 6 mm, and whose thickness is 0.10 mm.

(Example 2)
An infrared-absorbing glass was produced in the same manner as in Example 1 except that the modified portion was provided at 60% in the thickness direction of the base material.

(Comparative example)
An infrared ray absorbing glass was produced in the same manner as in Example 1 except that the modified portion was provided at 30% in the thickness direction of the base material.

  Table 1 below shows the results of the bending strength test conducted on the infrared absorbing glasses of Example 1, Example 2 and Comparative Example.

  As shown in Table 1, it is understood that the bending strength in Example 1 and Example 2 is 100 MPa or more, which is higher than that of the comparative example. Thus, in Example 1 and Example 2, infrared rays absorption glass is hard to be damaged.

DESCRIPTION OF SYMBOLS 1a ... 1st main surface 1b ... 2nd main surface 1c ... Side surface 1d ... 1st end edge part 1e ... 2nd end edge part 2 ... Modification part 10 ... Glass 20 ... Base material 21 ... Support body 22 ... pressing member 23 ... blade

Claims (14)

It has a first main surface and a second main surface facing each other, and a side surface connecting the first main surface and the second main surface,
In the thickness direction, 50% or more of the side surface is provided with a reformed portion,
The glass in which the reforming portion has not reached the first main surface and the second main surface. A first end edge which is an end edge of the first main surface has a wave-like shape in plan view,
The glass according to claim 1, wherein an average value of wave numbers in the wavelike shape of the first edge portion is 1 mm- ¹ or less. It has a first main surface and a second main surface facing each other, and a side surface connecting the first main surface and the second main surface,
A first end edge which is an end edge of the first main surface has a wave-like shape in plan view,
Glass whose average value of the wave number in the wavelike shape of said 1st edge part is 1 mm <^-1> or less. A second end edge which is an end edge of the second main surface has a wavy shape in plan view,
The glass according to claim 2 or 3, wherein an average value of wave numbers in both the wave-like shape of the first edge and the wave-like shape of the second edge is 1 mm- ¹ or less. In the thickness direction, 50% or more of the side surface is provided with a reformed portion,
The glass according to claim 3, wherein the modified portion does not reach the first main surface and the second main surface. In the thickness direction, 60% or more of the side surface is provided with a reformed portion,
The glass as described in any one of Claims 1-5 in which the said modification part has not reached the said 1st main surface and the said 2nd main surface.   The glass according to any one of claims 1, 2, 5 and 6, wherein the center of the side surface in the thickness direction and the center of the modified portion in the thickness direction are at the same position.   The glass according to any one of claims 1 to 7, which has a thickness of 0.3 mm or less.   The glass according to any one of claims 1 to 8, which is an infrared absorbing glass.   The glass according to any one of claims 1 to 9, which has a bending strength of 100 MPa or more. Preparing a glass base material having a first main surface and a second main surface facing each other;
Providing a reformer inside the matrix by irradiating the matrix with laser light;
And c. Cutting the base material along the portion where the reforming section is provided,
In the step of providing the reformed portion, the reformed portion is 50% or more in the thickness direction of the base material so that the reformed portion does not reach the first main surface and the second main surface. The method for producing glass, provided in   The manufacturing method of the glass of Claim 11 which provides the said modification part in 60% or more in the thickness direction of the said base material in the process of providing the said modification part.   In the step of providing the reforming unit, the reforming unit is provided such that the center of the base material in the thickness direction of the base material and the center of the reforming unit in the thickness direction of the base material are at the same position. The manufacturing method of the glass of Claim 11 or 12.   The manufacturing method of the glass as described in any one of Claims 11-13 whose said glass is infrared rays absorption glass.

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