METHOD OF SCRIBING ON BRITTLE MATETRIAL, SCRIBE HEAD, AND SCRIBING APPARATUS WITH THE SCRIBE HEAD

摘要

A scribing method that provides in a glass plate particularly deep vertical cracks that form scribe lines crossing each other. With the method, the glass plate can be cut apart exactly along the scribe lines in a cut-apart step after the cross scribing. On a scribe head main body (2) that travels on a brittle material, there is provided a tip holder (4) so as to be swingable about the axis of a support shaft (9) that is parallel to a face of the brittle material. A scribe head (1) has the tip holder (4) and a cutter wheel tip (5) that is installed on the holder so as to be rotatable about the axis of a rotation shaft (13) that is parallel to the brittle material face. With the support shaft (9) facing the backside with respect to the cutter wheel tip (5), the scribe head (1) is made to travel on the brittle material face to form a scribe line on the face.