Patents Examined by Jeahwan Oh
  • Patent number: 9142642
    Abstract: A semiconductor device system, structure and method of manufacture of a source/drain with SiGe stressor material to address effects due to dopant out-diffusion are disclosed. In an embodiment, a semiconductor substrate is provided with a gate structure, and recesses for source and drain are formed on opposing sides of the gate structure. Doped stressors are embedded into the recessed source and drain regions, and a plurality of layers of undoped stressor, lightly doped stressor, highly doped stressor, and a cap layer are formed in an in-situ epitaxial process. In another embodiment the doped stressor material is boron doped epitaxial SiGe. In an alternative embodiment an additional layer of undoped stressor material is formed.
    Type: Grant
    Filed: February 10, 2012
    Date of Patent: September 22, 2015
    Assignee: Taiwan Semiconductor Manufacturing Company, Ltd.
    Inventors: Chao-Hsuing Chen, Ling-Sung Wang, Chi-Yen Lin