Patent ID: 9343612
Filing Date: 2016-05-17
CPC Classification: H01L

Claim Text:
1. A method comprising: providing a wafer of semiconductor devices grown on a growth substrate, each semiconductor device comprising an n-type region and a p-type region, wherein the wafer of semiconductor devices has a first surface and a second surface opposite the first surface, wherein the second surface is a surface of the growth substrate; bonding the first surface to a first wafer, the first wafer comprising a body; bonding the second surface to a second wafer, wherein the first and second wafer each have a different coefficient of thermal expansion than the growth substrate; after bonding the first surface to the first wafer, for each semiconductor device, etching a first via through an entire thickness of the body to expose a metal electrically connected to the n-type region and etching a second via through an entire thickness of the body to expose a metal electrically connected to the p-type region; after etching the first and second vias, removing the second wafer.