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:
May. 16, 2000
Filed:
Dec. 10, 1998
Steven C Deane, Redhill, GB;
John M Shannon, Whyteleafe, GB;
U.S. Philips Corporation, New York, NY (US);
Abstract
A thin film transistor (10) in an electronic device such as an active matrix display panel having an intrinsic amorphous silicon semiconductor layer (22) providing a channel region (23) between source and drain electrodes (14, 16) includes directly adjacent to the side of the semiconductor layer (22) remote from the gate electrode (25) at the channel region (23) a layer (20) of amorphous semiconductor material which has a high defect density and low conductivity that serves to provide recombination centres for photogenerated carriers. Leakage problems due to the photoconductive properties of the intrinsic semiconductor material are then reduced. Conveniently, an hydrogenated silicon rich amorphous silicon alloy (e.g. nitride etc) can be used for the recombination centre layer (20).