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:
Apr. 18, 2017
Filed:
Dec. 30, 2014
Taiwan Semiconductor Manufacturing Company, Ltd., Hsin-Chu, TW;
Chun-Fai Cheng, Hsin-Chu, TW;
Chin-Te Su, Hsin-Chu, TW;
Ka-Hing Fung, Hsin-Chu, TW;
Shyh-Wei Wang, Hsin-Chu, TW;
TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY, LTD., Hsin-Chu, TW;
Abstract
The present disclosure provides a semiconductor device and methods of making wherein the semiconductor device has strained asymmetric source and drain regions. A method of fabricating the semiconductor device includes receiving a substrate and forming a poly gate stack on the substrate. A dopant is implanted in the substrate at an implant angle ranging from about 10° to about 25° from perpendicular to the substrate. A spacer is formed adjacent the poly gate stack on the substrate. A source region and a drain region are etched in the substrate. A strained source layer and a strained drain layer are respectively deposited into the etched source and drain regions in the substrate, such that the source region and the drain region are asymmetric with respect to the poly gate stack. The poly gate stack is removed from the substrate and a high-k metal gate is formed using a gate-last process where the poly gate stack was removed.