The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 25, 2015
Filed:
Jan. 31, 2013
Applicant:
United Microelectronics Corp., Hsin-Chu, TW;
Inventors:
Chia-Jui Liang, Tainan, TW;
Po-Chao Tsao, New Taipei, TW;
Assignee:
UNITED MICROELECTRONICS CORP., Science-Based Industrial Park, Hsin-Chu, TW;
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01L 21/8238 (2006.01); H01L 21/8234 (2006.01); H01L 29/66 (2006.01); H01L 29/78 (2006.01); H01L 29/165 (2006.01);
U.S. Cl.
CPC ...
H01L 21/823418 (2013.01); H01L 21/823412 (2013.01); H01L 21/823468 (2013.01); H01L 29/165 (2013.01); H01L 29/66636 (2013.01); H01L 29/7834 (2013.01); H01L 29/7848 (2013.01);
Abstract
An epitaxial process includes the following steps. A substrate including a first area and a second area is provided. A first gate and a second gate are formed respectively on the substrate of the first area and the second area. A first spacer and a second spacer are respectively formed on the substrate beside the first gate and the second gate at the same time. A first epitaxial structure is formed beside the first spacer and then a second epitaxial structure is formed beside the second spacer by the first spacer and the second spacer respectively.