Method of manufacturing a semiconductor device
US8962428B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 3, 2013 |
| Grant date | Feb 24, 2015 |
| Priority date | — |
| Expiry date | Jul 3, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10D84/83
- WIPO fieldSemiconductors
- WIPO sectorElectrical engineering
Abstract
A semiconductor device and method of fabricating the semiconductor device are disclosed. The method includes forming a plurality of gates on a surface of a substrate, forming sidewalls on side surfaces of the gates, forming a Sigma-shaped recess in the substrate between adjacent gates, forming a SiGe seed layer on an inner surface of the Sigma-shaped recess, forming bulk SiGe doped with boron on a surface of the SiGe seed layer, and filling the Sigma-shaped recess with the boron-doped bulk SiGe, forming a first recess by etching a portion of the SiGe seed layer and the boron-doped bulk SiGe in the Sigma-shaped recess, and forming a SiGe regeneration layer in the first recess beneath the surface of the substrate, wherein the SiGe regeneration layer is doped with boron, and the boron-doped SiGe regeneration layer has a higher concentration of boron than the SiGe seed layer or the boron-doped bulk SiGe.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.