Mitsuboshi Diamond Industrial Co.

Japan

Mitsuboshi Diamond Industrial Co.

Japan

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Patent
Mitsuboshi Diamond Industrial Co. | Date: 2017-02-08

A cutter edge (51) is pressed against a brittle-material substrate (4) so that a protruding portion (PP) of the cutter edge (51) is positioned between a first edge (ED1) of the brittle-material substrate (4) and a side portion (PS) of the cutter edge (51) and that a side portion (PS) of the cutter edge (51) is positioned between the protruding portion (PP) of the cutter edge (51) and a second edge (ED2) of the brittle-material substrate (4). A scribe line is formed by a scratch between a first position closer to the first edge of the first and second edges (ED1, ED2) and a second position closer to the second edge (ED2) of the first and second edges (ED1, ED2). After the formation of the scribe line, a crack is extended in a thickness direction (DT) from the second position toward the first position along the scribe line, thus forming a crack line.


Patent
Mitsuboshi Diamond Industrial Co. | Date: 2017-04-05

A cutter edge (51) is caused to slide to generate a plastic deformation on a first surface (SF1) of a brittle substrate (4), thus forming a trench line (TL). The trench line (TL) is formed so as to obtain a crack-free state in which the brittle substrate (4) seamlessly continues in a direction intersecting the trench line (TL) directly below the trench line (TL). The crack-free state is then maintained. A crack of the brittle substrate (4) in its thickness direction is extended along the trench line (TL) to form a crack line (CL). The brittle substrate (4) is divided along the crack line (CL).


Patent
Mitsuboshi Diamond Industrial Co. | Date: 2017-03-08

Two glass substrates are fused using a simple method and a simple apparatus configuration without deformation of processed end surfaces. This method for fusing glass substrates is a method in which two glass substrates in close contact are irradiated with a laser beam and fused together, and includes a first step and a second step. In the first step, a first glass substrate and a second glass substrate are brought into close contact. In the second step, the first glass substrate and the second glass substrate are melted and fused together by scanning a laser beam having a wavelength of 2.7 m or more and 6.0 m or less along a portion where the first and second glass substrates are in close contact.


Patent
Mitsuboshi Diamond Industrial Co. | Date: 2015-03-12

A cutter edge is pressed against a brittle-material substrate so that a protruding portion of the cutter edge is positioned between a first edge of the brittle-material substrate and a side portion of the cutter edge and that a side portion of the cutter edge is positioned between the protruding portion of the cutter edge and a second edge of the brittle-material substrate. A scribe line is formed by a scratch between a first position closer to the first edge of the first and second edges and a second position closer to the second edge of the first and second edges. After the formation of the scribe line, a crack is extended in a thickness direction from the second position toward the first position along the scribe line, thus forming a crack line.


Patent
Mitsuboshi Diamond Industrial Co. | Date: 2017-05-31

A cooling device that enables the tip position of optical fiber to be adjusted and is able to efficiently cool an entirely of the optical fiber. This cooling device is provided with a cooling base plate (7), a fiber holder (21) and an adjustment member (22). The cooling base plate (7) has a recessed accommodating part (17). The fiber holder (21) is disposed in the recessed accommodating part (17) so as to be freely movable in a first direction. The fiber holder (21) is for holding a tip part of optical fiber (6) on a surface thereof, and for adjusting a tip position of the optical fiber (6) in the first direction. The adjustment member (22) is disposed in a gap between the fiber holder (21) and an end face (17b) of the recessed accommodating part (17), is configured to have the optical fiber (6) placed on a surface thereof, and is movable in the first direction by moving in a second direction that intersects the first direction. The adjustment member (22) abuts against both the end face (17b) of the recessed accommodating part (17) and an end face (21b) of the fiber holder (21).


Patent
Mitsuboshi Diamond Industrial Co. and Osaka University | Date: 2017-07-05

In an optical fiber device having a configuration in which an optical fiber is joined to a side surface of another optical fiber, a joint portion is suppressed from reaching a high temperature. The optical fiber device includes a first fluoride fiber (3), a second fluoride fiber (4), and a heat dissipation member (6). The first fluoride fiber (3) guides light. The second fluoride fiber (4) has a first end on or from which light is incident or output and a second end at which an end surface of the second fluoride fiber is obliquely joined to a side surface of the first fluoride fiber (3). The heat dissipation member (6) is disposed so as to cover the entire circumference of a joint portion of the first fluoride fiber (3) and the second fluoride fiber (4), and has a thermal conductivity equal to or greater than that of the first and second fibers (3, 4) and a property of transmitting light guided by the fibers.


Patent
Mitsuboshi Diamond Industrial Co. | Date: 2017-08-02

A cutter edge is pressed against a surface (SF) of a brittle substrate (4). The pressed cutter edge is slid on the surface (SF) of the brittle substrate (4) to generate plastic deformation on the surface (SF) of the brittle substrate (4), thereby forming a trench line (TL) having a groove shape. The step of forming the trench line (TL) is performed to obtain a crack-free state, in which the brittle substrate (4) seamlessly continues in a direction intersecting the trench line (TL) directly below the trench line (TL). The trench line (TL) includes a curved portion. A crack line (CL) is formed by extending a crack in the brittle substrate (4) in a thickness direction along the trench line (TL). The crack line (CL) breaks seamless continuity of the brittle substrate (4) in the direction intersecting the trench line (TL) directly below the trench line (TL).


Patent
Mitsuboshi Diamond Industrial Co. | Date: 2016-02-03

An optical fiber (6) includes a first optical fiber body (61), a second optical fiber body (62) and a first end cap (63). The first optical fiber body (61) includes a first core (611) and a first cladding (612) . The second optical fiber body (62) includes a second core (621) and a second cladding (622), and is joined at a first end surface (623) thereof to a first end surface (613) of the first optical fiber body (61). The first end cap (63) has light permeability and is joined to a second end surface (624) of the second optical fiber body (62). The first core (611) is doped with a laser medium. A mass content of the laser medium in the second core (621) is lower than that of the laser medium in the first core (611).


Patent
Mitsuboshi Diamond Industrial Co. | Date: 2015-03-25

The invention concerns a method for manufacturing a cutter wheel (10C) for scribing a brittle material substrate, having the steps of forming a blade edge on a wheel (10A) in a disc form by roughly grinding the blade edge at at least one blade edge angle 1 and then forming the edge side of said blade (10B) by finely grinding the blade edge at a blade edge angle 2 which is different from blade edge angle 1. The invention further concerns a cutter wheel (10C).


Provided is a scribing method capable of forming a vertical crack with a high penetration amount in a thick glass plate and, in cutting thereafter, suppressing the occurrence of chipping or cracking in the thick glas splate. A scribing wheel, in which a blade edge angle is 150 or more and 160 or less and a tip portion of a blade edge is a curved surface whose radius of curvature in a cross section passing through a central axis is 9 m or more and 40 m or less, is prepared. Then, with the thick glass plate placed on a highly rigid table, being horizontally supported, the surface of the thick glass plate is scribed by causing the scribing wheel to roll in a predetermined scribe-line forming direction while causing the blade edge of the scribing wheel to abut the surface of the thick plate glass while applying a scribing load adjusted to a value predetermined in advance in accordance with a quality of material and a thickness of the thick glass plate to be applied from the blade edge to the thick glass plate .

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