Patent ID: 9070579
Filing Date: 2015-06-30
Classification: H01L

Abstract:
1. A semiconductor structure comprising: a first field effect transistor including a first semiconductor material portion, a first stack of a first portion of a gate dielectric layer and a first workfunction material portion located over said first semiconductor material portion, and a first gate conductor material layer applying a first stress to said first workfunction material portion, wherein said first workfunction material portion is under a first strain due to said first stress; and a second field effect transistor including a second semiconductor material portion, a second stack of a second portion of said gate dielectric layer and a second workfunction material portion located over said second semiconductor material portion, a second gate conductor material layer applying a second stress that is different from said first stress to said second workfunction material portion, wherein said second workfunction material portion is under a second strain due to said second stress, and said first strain and said second strain shift workfunctions of said first and second workfunction material portions differently, wherein said first semiconductor material portion and said second semiconductor material portion comprise a first semiconductor fin located on an insulating layer and a second semiconductor fin located on said insulating layer.