Scribing method for brittle materials, a cutter wheel used therefor and an apparatus provided therewith

摘要

It is possible by use of a disclosed cutter wheel to obtain deep vertical cracks inside brittle materials while suppressing generation of horizontal cracks. Such a cutter wheel for brittle materials comprises a disk with two side planes and an outer periphery between them, outer periphery comprising two bevel portions and a ridge portion between them. The ridge portion comprises a plurality of peaks aligned along a circumferential line. For example, the ridge portion comprises a straight line connecting two adjacent peaks in the plurality of peaks. Alternatively, the ridge portion comprises a depression between two adjacent peaks in the plurality of peaks, and the depth of the depression is deeper than the straight line connecting between the two adjacent peaks. Preferably, the peaks are arranged at an equal distance between them.