Merged source/drain features
US11355641B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 15, 2021 |
| Grant date | Jun 7, 2022 |
| Priority date | — |
| Expiry date | Mar 15, 2041 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10D62/405
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The present application provides a semiconductor device and the method of making the same. The method includes recessing a fin extending from a substrate, forming a base epitaxial feature on the recessed fin, forming a bar-like epitaxial feature on the base epitaxial feature, and forming a conformal epitaxial feature on the bar-like epitaxial feature. The forming of the bar-like epitaxial feature includes in-situ doping the bar-like epitaxial feature with an n-type dopant at a first doping concentration. The forming of the conformal epitaxial feature includes in-situ doping the conformal epitaxial feature with a second doping concentration greater than the first doping concentration.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.