Patent ID: 6136668
Filing Date: 2000-10-24
Classification: H01L

Abstract:
A method of manufacturing a semiconductor device, comprising the steps of:preparing a semiconductor wafer having mutually opposite first and second main surfaces and including a semiconductor layer having a plurality of device formation regions with functional devices, and a separation region surrounding peripheries of said device formation regions in both said first and second main surfaces for separating said plurality of device formation regions from one another;forming a metal layer on said first main surface of said semiconductor layer in said separation region to surround said peripheries of said device formation regions;applying a reinforcing layer to said semiconductor wafer to cover an entire surface of said first main surface;selectively etching said separation region of said second main surface of said semiconductor layer to form a hole passing from said second main surface only to said metal layer and surrounding said device formation regions;removing said reinforcing layer from said semiconductor wafer; andirradiating said metal layer with laser for fusing and disconnecting said metal layer to divide said plurality of device formation regions into separate semiconductor chips.