Patent ID: 9111862
Filing Date: 2015-08-18
Classification: H01L

Abstract:
1. a method for manufacturing a semiconductor apparatus, comprises: providing a substrate; forming a gate structure for an N-channel semiconductor device over the substrate, wherein forming a gate structure for an N-channel semiconductor device comprises: forming an initial structure over the substrate, comprising: forming a dielectric layer over the substrate, and a gate over the dielectric layer, and forming a gate spacer covering vertical side surfaces of the gate and the vertical side surfaces of the dielectric layer; etching the gate spacer such that the gate spacer is partially etched at its lower end to expose a portion of the vertical side surfaces of the gate and the vertical side surfaces of the dielectric layer; and etching the exposed portion of the gate to form a recess, with respect to the gate dielectric layer, at a lower end portion of the side of the gate that is adjacent to a source region or a drain region; and depositing a stress material over the substrate and the gate structure.