Patent ID: 7659157

Claim:
A method of forming a semiconductor structure comprising: providing a first semiconductor fin and a second semiconductor fin on a substrate; forming a first high-k gate dielectric layer surrounding and laterally abutting said first semiconductor fin; forming a first high-k gate dielectric ring surrounding and laterally abutting said first semiconductor fin and another first high-k gate dielectric ring surrounding and laterally abutting said second semiconductor fin; forming a first metal gate ring surrounding and laterally abutting said first high-k gate dielectric layer and forming another first metal gate ring surrounding and laterally abutting said another first high-k gate dielectric ring; removing said another first high-k gate ring and said another first metal gate ring, while protecting said first high-k gate dielectric ring and said first metal gate ring with a block mask; forming a second metal gate layer on said first semiconductor fin and said second semiconductor fin; and forming a silicon containing layer directly on a portion of said second metal gate layer.