Patent ID: 8445964
Filing Date: 2013-05-21
Classification: H01L

Abstract:
1. A semiconductor device comprising: a substrate; first and second high-K/metal gates, each having an upper surface and side surfaces, over the substrate; a first spacer of a non-oxide material on the side surfaces of each high-K/metal gate; a second spacer, comprising a material different from that of the first spacer, on the first spacer, wherein the second spacer comprises a material having substantial resistance to hot phosphoric acid; epitaxially grown silicon germanium source and drain regions in the substrate on opposite sides of the first high-K/metal gate, laterally removed from the second spacers in a direction away from the first high-K/metal gate; epitaxially grown silicon carbide source and drain regions in the substrate on opposite sides of the second high-K/metal gate, laterally removed from the second spacers in a direction away from the second high-K/metal gate.