Patent ID: 11862712
Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 15:
16. A method of fabricating a semiconductor device, comprising:
providing a substrate including a first fin element and a second fin element extending from the substrate;
forming an isolation structure extending between the first fin element and the second fin element;
forming a gate structure formed over the first fin element and the second fin element; and
growing a source/drain feature adjacent the gate structure and over the first fin element and the second fin element, wherein growing the source/drain feature includes:
growing a first portion, a second portion and a third portion to form the source/drain feature, wherein growing the first portion uses a first carrier gas and growing the second portion uses a second carrier gas, wherein the first carrier gas is different than the second carrier gas; and wherein after growing the third portion, a top surface of the source/drain feature is formed having a first height above a plane defined by a top surface of the first fin element and a second height above the plane, and a third height above the plane, wherein the first height is defined over the first fin element and the third height is defined over the second fin element, and the second height is defined over the isolation structure, wherein the second height divided by the first height is between approximately 0.5 and 0.9.