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

Claim 15:
16. A method of forming a semiconductor device, the method comprising:
epitaxially growing a semiconductor region on a substrate, the semiconductor region comprising silicon germanium with a high Ge concentration region and a low Ge concentration region;
implanting a first dopant into the semiconductor region to form a first region, the first dopant having a larger molecular size than silicon germanium, the first dopant being an electrically inactive species;
implanting a second dopant into the first region, the second dopant being an n-type dopant or a p-type dopant; and
performing a first anneal process to recrystallize the first region to form a recrystallized region;
performing a second anneal process to liquidize and to move the second dopant towards an upper surface of the semiconductor region; and
forming a silicide region at the upper surface of the semiconductor region.