Patent ID: 7176522
Filing Date: 2007-02-13
Classification: H01L

Abstract:
1. A semiconductor circuit, comprising: a first semiconductor device in a substrate, the first semiconductor device comprises: a gate structure; a spacer disposed on sidewalls of the gate structure, the spacer having a first thickness; raised source and drain regions disposed on either side of the gate structure; a second semiconductor device in the substrate and electrically isolated from the first semiconductor device, the second semiconductor device comprises: a gate structure; a spacer disposed on sidewalls of the gate structure, the spacer having a second thickness less than the first thickness of the spacer of the first semiconductor device; recessed source and drain regions disposed on either side of the gate structure, wherein the recessed source and drain regions have a top surface recessed below a top surface of the substrate prior to formation of a contact on the recessed source and drain regions.