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:
Mar. 09, 2010
Filed:
Dec. 26, 2007
Norio Ishitsuka, Kasumigaura, JP;
Nobuyoshi Hattori, Itami, JP;
Tomio Iwasaki, Tsukuba, JP;
Renesas Technology Corp., Tokyo, JP;
Abstract
After a gate electrode is formed on a main surface of a semiconductor substrate, low concentration layers are formed on the main surface of the semiconductor substrate by implanting impurities therein, with using the gate electrode as a mask. Thereafter, first sidewalls and second sidewalls are formed on the both side surfaces of the gate electrode. Subsequently, nitrogen or the like is ion-implanted into the semiconductor substrate, with using the first sidewalls, the second sidewalls and the gate electrode as a mask, thereby forming a crystallization-control region (CCR) on the main surface of the semiconductor substrate. Then, after the second sidewalls are removed, high concentration layers for a source and a drain are formed on the main surface of the semiconductor substrate.