Patent ID: 9034705
Filing Date: 2015-05-19
Classification: H01L,Y10S

Abstract:
1. A method of forming a semiconductor device, comprising: providing at least one gate structure on a substrate, wherein the gate structure comprises a first spacer formed on a sidewall of a gate; depositing a first disposable spacer material layer on the substrate covering the gate structure; etching the first disposable spacer material layer to form a first disposable spacer on the first spacer; depositing a second disposable spacer material layer on the substrate covering the gate structure; etching the second disposable spacer material layer to form a second disposable spacer on the first disposable spacer; removing a portion of the substrate by using the first and second disposable spacers as a mask, so as to form two recesses in the substrate beside the gate structure; forming a stress-inducing layer in the recesses; removing the first and second disposable spacers; forming a second spacer on the first spacer; and forming two heavily doped regions in the stress-inducing layer beside the gate structure by using the second spacer as a mask.