Abstract: 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.

Abstract: 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.

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

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

Abstract: 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.

Abstract: A cutter wheel for scribing a brittle material substrate having excellent biting in the surface of the brittle material substrate when the brittle material substrate used for a liquid crystal display panel or the like is cut and a method for manufacturing the cutter wheel with high productivity are provided. The cutter wheel made of a hard metal or sintered diamond is formed in such a manner that a V-shaped ridge line part is formed as an edge along the circumferential part of a disk-like wheel, and at least one notch is engraved in the above described ridge line part and notches as that described above are formed in the entirety of the periphery of the above described ridge line part at a pitch of more than 200 ?m.

Abstract: A cutter wheel for scribing a brittle material substrate having excellent biting in the surface of the brittle material substrate when the brittle material substrate used for a liquid crystal display panel or the like is cut and a method for manufacturing the cutter wheel with high productivity are provided. The cutter wheel made of a hard metal or sintered diamond is formed in such a manner that a V-shaped ridge line part is formed as an edge along the circumferential part of a disk-like wheel, and at least one notch is engraved in the above described ridge line part and notches as that described above are formed in the entirety of the periphery of the above described ridge line part at a pitch of more than 200 ?m.

Abstract: A cutter wheel for scribing a brittle material substrate having excellent biting in the surface of the brittle material substrate when the brittle material substrate used for a liquid crystal display panel or the like is cut and a method for manufacturing the cutter wheel with high productivity are provided. The cutter wheel made of a hard metal or sintered diamond is formed in such a manner that a V-shaped ridge line part is formed as an edge along the circumferential part of a disk-like wheel, and at least one notch is engraved in the above described ridge line part and notches as that described above are formed in the entirety of the periphery of the above described ridge line part at a pitch of more than 200 ?m.

Abstract: There are provided a scribing step of performing scribing in a state in which a protective material is applied on at least one surface of a brittle material substrate, and a first scribing device that performs this scribing step. Accordingly, it is possible to form a vertical crack that reaches deep inside of the substrate, while effectively removing cullets produced at the time of severing the substrate, thus performing precise severing along a scribe line.

Abstract: A rotating shaft (23) is inserted through an axial center of a cutter wheel tip for scribing a brittle object. The rotating shaft (23) is integrally provided with the cutter wheel tip. The rotating shaft (23) is inserted into supporting holes (14) provided in side walls (11) of a tip holder (11) so as to be supported. A groove (13) is formed in an upper portion of each supporting hole (14) along an axial direction of the supporting hole (14).

Abstract: A rotating shaft (23) is inserted through an axial center of a cutter wheel tip for scribing a brittle object. The rotating shaft (23) is integrally provided with the cutter wheel tip. The rotating shaft (23) is inserted into supporting holes (14) provided in side walls (11) of a tip holder (11) so as to be supported. A groove (13) is formed in an upper portion of each supporting hole (14) along an axial direction of the supporting hole (14).

Abstract: A rotating shaft (23) is inserted through an axial center of a cutter wheel tip for scribing a brittle object. The rotating shaft (23) is integrally provided with the cutter wheel tip. The rotating shaft (23) is inserted into supporting holes (14) provided in side walls (11) of a tip holder (11) so as to be supported. A groove (13) is formed in an upper portion of each supporting hole (14) along an axial direction of the supporting hole (14).

Abstract: A cutter wheel for scribing a brittle material substrate having excellent biting in the surface of the brittle material substrate when the brittle material substrate used for a liquid crystal display panel or the like is cut and a method for manufacturing the cutter wheel with high productivity are provided. The cutter wheel made of a hard metal or sintered diamond is formed in such a manner that a V-shaped ridge line part is formed as an edge along the circumferential part of a disk-like wheel, and at least one notch is engraved in the above described ridge line part and notches as that described above are formed in the entirety of the periphery of the above described ridge line part at a pitch of more than 200 ?m.

Abstract: A rotating shaft (23) is inserted through an axial center of a cutter wheel tip for scribing a brittle object. The rotating shaft (23) is integrally provided with the cutter wheel tip. The rotating shaft (23) is inserted into supporting holes (14) provided in side walls (11) of a tip holder (11) so as to be supported. A groove (13) is formed in an upper portion of each supporting hole (14) along an axial direction of the supporting hole (14).

Abstract: A rotating shaft (23) is inserted through an axial center of a cutter wheel tip for scribing a brittle object. The rotating shaft (23) is integrally provided with the cutter wheel tip. The rotating shaft (23) is inserted into supporting holes (14) provided in side walls (11) of a tip holder (11) so as to be supported. A groove (13) is formed in an upper portion of each supporting hole (14) along an axial direction of the supporting hole (14).

Abstract: There are provided a scribing step of performing scribing in a state in which a protective material is applied on at least one surface of a brittle material substrate, and a first scribing device that performs this scribing step. Accordingly, it is possible to form a vertical crack that reaches deep inside of the substrate, while effectively removing cullets produced at the time of severing the substrate, thus performing precise severing along a scribe line.

Abstract: A rotating shaft (23) is inserted through an axial center of a cutter wheel chip for scribing a brittle object. The rotating shaft (23) is integrally provided with the cutter wheel chip. The rotating shaft (23) is inserted into supporting holes (14) provided in side walls (11) of a chip holder (11) so as to be supported. A groove (13) is formed in an upper portion of each supporting hole (14) along an axial direction of the supporting hole (14).

Abstract: A cutter wheel 1 is formed with an insertion through-hole 6 at the center of the wheel, along with a blade-edge ridge 2 that is displaced to one side face from a center 5 between between wheel side faces 3 and 4. The larger the extent of displacement of the blade-edge ridge 2, that is, the greater the distance from the center 5 until the blade-edge ridge 2, or in other words, the smaller the distance between the left-side face 3 and the blade-edge ridge 2, the closer scribing can be performed to the convex portion and thin film X of the devices during scribing.

Abstract: A cutter wheel for forming scribe lines on a brittle plate has a disk with two side planes. The disk has an edge formed at the outer periphery of the disk and a shaft hole formed at the center of the disk for inserting a rotational shaft. Further, at least one groove is formed to extend from a surface of one of the side planes along the shaft hole.

Abstract: A cutter wheel for forming scribe lines on a brittle plate has a disk with two side planes. The disk has an edge formed at the outer periphery of the disk and a shaft hole formed at the center of the disk for inserting a rotational shaft. Further, at least one groove is formed to extend from a surface of one of the side planes along the shaft hole.