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:
Sep. 05, 2023
Filed:
Sep. 30, 2021
Applicant:
United Microelectronics Corp., Hsin-Chu, TW;
Assignee:
UNITED MICROELECTRONICS CORP., Hsin-Chu, TW;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01L 21/324 (2006.01); H01L 29/66 (2006.01); H01L 29/78 (2006.01); H01L 21/02 (2006.01);
U.S. Cl.
CPC ...
H01L 29/66492 (2013.01); H01L 21/02334 (2013.01); H01L 21/324 (2013.01); H01L 29/6656 (2013.01); H01L 29/66636 (2013.01); H01L 29/7848 (2013.01);
Abstract
The invention provides a method for forming a semiconductor structure. The method includes providing a substrate, forming a gate structure on the substrate, respectively forming an epitaxial layer on both sides of the gate structure, and performing a pre-amorphization doping step on the substrate. After the pre-amorphization doping step, a defect is generated in the epitaxial layer, an outer spacer is formed beside the gate structure, and a chemical cleaning step is performed to remove a part of the epitaxial layer, and the defect in the epitaxial layer is removed.