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:
Jun. 24, 2008
Filed:
Jun. 25, 2004
Applicant:
Hirotaka Kawata, Suwa, JP;
Inventor:
Hirotaka Kawata, Suwa, JP;
Assignee:
Seiko Epson Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01L 29/04 (2006.01); H01L 31/036 (2006.01); H01L 31/0376 (2006.01); H01L 31/20 (2006.01);
U.S. Cl.
CPC ...
Abstract
A TFT is provided completely separated by an insulating film, in which a parasitic MOSFET is not generated at ends of a semiconductor layer, and the variation in characteristics is small. At least one portion of the ends in the gate-width direction of a gate electrode forming the TFT is disposed in a semiconductor region which forms the TFT, and the ends in the gate-length direction of the gate electrode extend toward the outside of the semiconductor region forming the TFT. With this arrangement, a uniform TFT in which a parasitic MOSFET is not generated at the ends in the gate-width direction is obtainable.