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:
Aug. 23, 2011
Filed:
Sep. 25, 2006
Yushi Jinno, Gifu, JP;
Yushi Jinno, Gifu, JP;
Sanyo Electric Co., Ltd., Moriguchi-shi, JP;
Abstract
The invention prevents a photocurrent due to external light and a variation in characteristics of transistors or a failure by a short circuit due to the influence of a back channel. A light shield film made of a nonconductive material is formed on an insulation substrate. A back gate insulation film is formed covering the light shield film. An active layer is formed on this back gate insulation film. A gate insulation film is formed covering the active layer, and a gate electrode is formed on the gate insulation film. The light shield film is disposed covering the active layer with the back gate insulation film interposed therebetween, having a function of shielding the active layer from external light entering through the insulation substrate.