METHOD FOR BREAKING BRITTLE MATERIAL SUBSTRATE

摘要

PURPOSE: A method for breaking a brittle material substrate is provided to secure dimension precision of divided pieces through proper division with reduced dimension differences without presenting conditions for setting intervals of upper blades. CONSTITUTION: A method for breaking a brittle material substrate is as follows. Second break bars(3,4) are arranged in two positions located at a set interval, 1.3-1.6 times a division pitch, from a predetermined division position. A brittle material substrate(5) is pressed and broken by contacting the second break bars to the brittle material substrate.