Patent ID: 9401415
Filing Date: 2016-07-26
CPC Classification: H01L

Claim Text:
1. A fin field effect transistor (FinFET) device structure, comprising: a fin structure extending above a substrate along a lengthwise direction thereof; a gate dielectric layer formed over the fin structure; a gate electrode formed on the gate dielectric layer; a plurality of gate spacers formed on sidewalls of the gate electrode, wherein the gate spacers are in direct contact with the fin structure; and a source/drain (S/D) stressor formed adjacent to the gate spacers, wherein the gate dielectric layer has a top surface and a bottom surface, and a bottom width of the bottom surface of the gate dielectric layer is smaller than a top width of the top surface of the gate dielectric layer when seen from a cross sectional view along the lengthwise direction of the fin structure, wherein the gate dielectric layer has a trapezoid shape or L-shape, wherein sidewalls of the gate spacers are not parallel to sidewalls of the gate electrode, and wherein the sidewalls of the gate dielectric layer is sloped to a top surface of the fin structure.