Patent ID: 8945971
Filing Date: 2015-02-03
Classification: H01L

Abstract:
1. A method of layer deposition on a substrate, comprising: depositing one or more first layers of amorphous material comprising a total first layer thickness on a front-surface and a back-surface of the substrate; depositing one or more second layers of the amorphous material comprising a total second layer thickness over the first layer on the front-surface; patterning the front-surface which thins a total thickness of the one or more first and second layers on the front-surface; and performing a thermal process comprising a temperature which exceeds a crystallization threshold of the amorphous material; wherein a thickness delta between a total front-surface thickness of the patterned first and second layers remaining on the front-surface and a total back-surface thickness of the one or more first layers residing on the back surface is maintained at a value which is less than a delta threshold value, which causes a predetermined amount of asymmetric stress between the front and back surfaces resulting in a predetermined warpage of the substrate.