Patent ID: 8544374

Claim:
A scribe device comprising: a placement means on which a brittle material substrate is placed; a scribe head facing the brittle material substrate on said placement means; a holder joint installed on an end of said scribe head, said holder joint comprising an opening; a tip holder comprising a wheel tip, a wheel tip pin, an installation part, a side surface, a first extent and a second extent, at least a portion of said tip holder having a circular pillar shape, said first extent and said second extent extending from one end portion of said installation part, said first extent being parallel to said second extent, said side surface being parallel to a longitudinal axis of said tip holder, said first extent comprising a first extent planar surface, said second extent comprising a second extent planar surface, said first extent and said second extent defining a wheel tip receiving space, said first extent comprising a first pin groove portion, said second extent comprising a second pin groove portion, said first pin groove portion and said second pin groove portion defining a common pin receiving groove, said common pin groove receiving said pin, said common pin groove being perpendicular to said first extent planar surface and said second extent planar surface, said installation part comprising a planar installation part surface and an installation part inclined portion at another end thereof, said another end being opposite said first extent and said second extent, said side surface being located between said installation part inclined portion and at least one of said first extent and said second extent and, said installation part inclined portion being located between said planar installation part surface and said side surface, said tip holder being detachably connected to said holder joint, wherein at least a portion of said tip holder is inserted in said opening, at least said planar installation part surface and said installation part inclined portion being arranged in said opening, at least a portion of said wheel tip being arranged in said wheel tip receiving space, said wheel tip being rotatably attached to said first extent and said second extent via said wheel tip pin for forming a scribe line; a tip holder pin, said tip holder being fixed in said opening via at least said tip holder pin, wherein said tip holder does not rotate in said opening via said tip holder pin, said holder joint having a holder joint groove, at least a portion of said tip holder pin being arranged in said holder joint groove, wherein said tip holder pin extends from one portion of said holder joint to another portion of said holder joint, said one portion of said holder joint being opposite said another portion of said holder joint, at least a portion of said tip holder pin engaging said installation inclined portion; and a relative move part for moving said scribe head and said brittle material substrate relatively in a plane along a flat surface of the brittle material substrate.