Patent ID: 7193269
Filing Date: 2007-03-20
Classification: H01L

Abstract:
1. A semiconductor device including a p-channel MOS field effect transistor with a channel region which has a compressive strain in a channel direction and a compressive strain in a gate width direction, wherein the compressive strain in the channel direction is larger than the compressive strain in the gate width direction, and wherein the channel region of the p-channel MOS field effect transistor has a tensile stress in the gate width direction, and wherein the p-channel MOS field effect transistor comprises a source/drain length of less than 1 micrometer, the source/drain length comprising a distance from a gate electrode to a side of a source/drain region, and the side extends in a gate width direction, so that the compressive strain in the channel direction is larger than the compressive strain in the gate width direction.