Patent ID: 11955553
Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 10:
11. A method of forming a semiconductor device, the method comprising:
forming a doped active region on a substrate, the doped active region including a first region having a first germanium concentration and a second region having a second germanium concentration, the first germanium concentration being greater than the second germanium concentration, the first region being over the second region;
forming a dielectric layer over the doped active region;
forming an opening through the dielectric layer to expose an exposed region of the first region of the doped active region;
implanting a first dopant into the exposed region, wherein the first dopant has a larger molecule size than a molecule of a material of the doped active region;
after implanting the first dopant, implanting at least a second dopant comprising a p-type dopant or an n-type dopant into the doped active region containing the first dopant;
performing a plurality of anneal processes;
after performing the plurality of anneal processes, forming a silicide region at an upper surface of the exposed region; and
forming a conductive feature in the opening to the silicide region.