Patent ID: 7893503
Filing Date: 2011-02-22
Classification: H01L

Abstract:
1. A semiconductor device, comprising: a first transistor of a first conductivity type, the first transistor comprising a first active region having formed thereabove a first gate electrode, the first active region comprising a substantially continuous first semiconductor alloy extending laterally between an isolation structure bordering said first active region, the first active region further comprising a layer of semiconductor material formed on said first semiconductor alloy, said first semiconductor alloy generating a first type of strain in said layer of semiconductor material; and a second transistor of a second conductivity type, the second transistor comprising a second active region having formed thereabove a second gate electrode, the second active region comprising a second semiconductor alloy provided in a first portion and a second portion, said first and second portions being separated by a region formed from said semiconductor material and generating a second type of strain in said region, said second type of strain being opposite said first type of strain.