Patent ID: 9649723
Date: 2017-05-16
CPC Classifications: B23K,B24B,H01L

Claim:
1. A processing apparatus comprising: holding means having a holding surface for rotatably holding an ingot; a holding table for selectively positioning said holding means to a laser processing position corresponding to said laser beam applying mechanism and an abrading position corresponding to said abrading means; a laser beam applying mechanism having laser beam generating means for generating a laser beam and focusing means for focusing said laser beam generated by said laser beam generating means to the inside of said ingot held by said holding means; relatively moving means for relatively moving said holding means and said laser beam applying mechanism in a direction parallel to said holding surface of said holding means while applying the laser beam to said ingot to thereby form a modified layer inside of said ingot; separating means for separating a part of said ingot along said modified layer as a boundary formed inside said ingot; and abrading means having an abrasive wheel for abrading said modified layer left on said ingot after separating said part and a spindle for rotatably mounting said abrading wheel.