Patent ID: 9368353
Filing Date: 2016-06-14
CPC Classification: H01L

Claim Text:
1. A method comprising: growing a channel layer over a substrate, wherein the channel layer comprises: depositing a first hard mask layer over the channel layer; patterning the first hard mask layer; applying a first delta doping process to the first channel region to form a first delta doping layer over the first channel region; depositing a first cap layer over the first delta doping layer; depositing a second hard mask layer over the channel layer, wherein the first cap layer is embedded in the second hard mask layer; patterning the second hard mask layer and the first hard mask layer to expose the second channel region; applying a second delta doping process to the second channel region to form a second delta doping layer over the second channel region; and applying a first diffusion process to the first delta doping layer and the second delta doping layer.