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:
Jan. 01, 2008
Filed:
Mar. 18, 2004
Yoshiharu Hirakata, Kanagawa, JP;
Yukie Nemoto, Kanagawa, JP;
Yoshiharu Hirakata, Kanagawa, JP;
Yukie Nemoto, Kanagawa, JP;
Semiconductor Energy Laboratory Co., Ltd., Kanagawa-ken, JP;
Abstract
A channel-length of a TFT can be controlled with higher reproducibility, and a short channel-length of the TFT can be manufactured. Further, a structure of the TFT having an improved current-voltage characteristic is provided. A thin film transistor has a lamination layer where a first conductive film, a first insulating film and a second conductive film are sequentially laminated, a semiconductor film is formed so as to be in contact with the side surface of the lamination layer, and a third conductive film covers the semiconductor film through a second insulating film. The first conductive film and the second conductive film are a source electrode and a drain electrode, a region which is in contact with the first insulating film and the third conductive film is a channel forming region in the semiconductor film, and the third conductive film is a gate electrode.