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:
Oct. 07, 2014
Filed:
May. 26, 2000
Shunpei Yamazaki, Tokyo, JP;
Jun Koyama, Kanagawa, JP;
Kunitaka Yamamoto, Kanagawa, JP;
Toshimitsu Konuma, Kanagawa, JP;
Shunpei Yamazaki, Tokyo, JP;
Jun Koyama, Kanagawa, JP;
Kunitaka Yamamoto, Kanagawa, JP;
Toshimitsu Konuma, Kanagawa, JP;
Semiconductor Energy Laboratory Co., Ltd., Kanagawa-ken, JP;
Abstract
An object of the present invention is to provide an EL display device having a high operation performance and reliability. The switching TFTformed within a pixel has a multi-gate structure, which is a structure which imposes an importance on reduction of OFF current value. Further, the current control TFThas a channel width wider than that of the switching TFT to make a structure appropriate for flowing electric current. Morever, the LDD regionof the current control TFTis formed so as to overlap a portion of the gate electrodeto make a structure which imposes importance on prevention of hot carrier injection and reduction of OFF current value.