Patent ID: 9653308
Date: 2017-05-16
CPC Classifications: H01L

Claim:
1. A method for performing epitaxial lift-off, the method comprising the steps of: providing a support structure having an upper surface which is angled relative to a bottom of a container: receiving a sample comprising: supporting the sample whereby an entire bottom surface of the growth substrate rests on the upper surface of the support structure inside the container; and filling the container with a wet etchant such that the wet etchant progressively etches away the sacrificial layer and the device layer lifts away from the growth substrate; wherein the sample is supported in the container such that the top surface of the growth substrate is non-parallel with an uppermost surface of the wet etchant while filling the container with the wet etchant; wherein the method further comprising determining how fast an etch front moves along the growth substrate at least in part by modifying the upper surface of the support structure.