Patent ID: 9484265
Filing Date: 2016-11-01
CPC Classification: H01L

Claim Text:
1. A method of forming a semiconductor device, comprising: providing a semiconductor substrate with first and second device regions, wherein the first device region includes a first source/drain (S/D) region and the second device region includes a plurality of second S/D regions; etching a plurality of first recesses in the first S/D region and a plurality of second recesses in the second S/D regions; growing a first plurality of first epitaxial features in the first recesses and a second plurality of first epitaxial features in the second recesses; and growing a third plurality of second epitaxial features over the first plurality and a fourth plurality of second epitaxial features over the second plurality, wherein the first and third epitaxial features are different, and the second and fourth epitaxial features are different.