Patent ID: 8276796
Filing Date: 2012-10-02
Classification: B28D,B65G,C03B,Y02P,Y10T

Abstract:
1. A brittle material substrate cutting apparatus, comprising: a cutting section for cutting a brittle material substrate into a first substrate portion and a second substrate portion by applying a pressure in a vicinity of a scribe line having a vertical crack formed beforehand on a top surface of the brittle material substrate so as to extend the vertical crack to reach a bottom surface of the brittle material substrate, the pressure movable along and relative to the scribe line; and a cut-face separating section for contacting a top surface and a bottom surface of the first substrate portion and moving the first substrate portion in a direction to move away a cut face of the first substrate portion from a cut face of the second substrate portion, wherein the cut-face separating section includes: a first roller for generating a force to separate the first substrate portion from the second substrate portion by rolling of the first roller on the top surface of the first substrate portion while pressed upon the top surface of the first substrate portion and elastically deformed; and a second roller, arranged so as to oppose the first roller with the first substrate portion therebetween, for generating a force to separate the first substrate portion from the second substrate portion by rolling of the second roller on the bottom surface of the first substrate portion while pressed upon the bottom surface of the first substrate portion and elastically deformed, wherein a size of a diameter of each of the first roller and the second roller in its axial direction gradually increases from one side thereof toward the other side, and a portion of each of the first roller and the second roller having a small diameter that is arranged so as to be adjacent to the cut face.