Patent ID: 9054179
Filing Date: 2015-06-09
Classification: H01L

Abstract:
1. A wafer processing method for dividing a wafer into a plurality of individual devices along a plurality of crossing division lines formed on a front side of said wafer, said wafer including a substrate and a functional layer formed on a front side of said substrate, said individual devices being formed from said functional layer and partitioned by said division lines, said wafer processing method comprising: a functional layer removing step of applying a CO a groove shaping and debris removing step of applying a laser beam having a wavelength in an ultraviolet region to said wafer along each groove after performing said functional layer removing step, thereby removing debris sticking to a bottom surface of each groove and also shaping side walls of each groove; and a dividing step of cutting said wafer along each groove after performing said groove shaping and debris removing step, thereby dividing said wafer into said individual devices.