Patent ID: 9224650
Filing Date: 2015-12-29
Classification: B23K,H01L

Abstract:
1. A method of dicing a semiconductor wafer comprising a plurality of integrated circuits on a front side thereof and metallization on a backside thereof, the method comprising: patterning the metallization on the backside with a first laser scribing process to provide a first plurality of laser scribe lines on the backside, and die marking the back side of the semiconductor wafer during the first laser scribing process, the patterning performed without using a mask; subsequent to performing the first laser scribing process, forming a mask on the front side of the semiconductor wafer; patterning, from the front side of the semiconductor wafer, the mask with a second laser scribing process to provide a patterned mask and to provide a second plurality of scribe lines exposing regions of the semiconductor wafer between the integrated circuits, wherein the second plurality of scribe lines is aligned with the first plurality of scribe lines; and plasma etching the semiconductor wafer through the second plurality of scribe lines to singulate the integrated circuits.