Patent ID: 9586331
Date: 2017-03-07
CPC Classifications: B26D,B28D,H01L,Y10T

Claim:
1. A dividing method for a disk-shaped workpiece on which a plurality of first division lines extending in a first direction and a plurality of second division lines intersecting the first division lines and extending in a second direction are set to define a plurality of chips, said disk-shaped workpiece having a chip region where said chips are formed and a peripheral marginal region surrounding said chip region, said dividing method comprising: a first cutting step of fully cutting said workpiece in a thickness direction thereof along said first division lines by using a cutting blade; and a second cutting step of fully cutting said workpiece in said thickness direction along said second division lines by using said cutting blade after performing said first cutting step; wherein the direction of rotation of said cutting blade is set so that said cutting blade cuts said workpiece from an upper surface thereof to a lower surface thereof, and a cutting fluid is supplied to said cutting blade in performing said first cutting step and said second cutting step, and in at least said second cutting step, said cutting blade is fed to cut into said workpiece from an outside edge of an outer circumference thereof in said second direction toward an end where the outer circumference of said workpiece is not cut to form an uncut region.