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:
Feb. 26, 2002
Filed:
Apr. 28, 1999
Applicant:
Inventor:
Tao Jing, Fremont, CA (US);
Assignee:
Exar Corporation, Fremont, CA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01L 2/700 ; H01L 3/100 ;
U.S. Cl.
CPC ...
H01L 2/700 ; H01L 3/100 ;
Abstract
An image sensor integrated circuit with a pixel cell having photogates wherein each photogate has a number of gaps which allow light to penetrate to the substrate. The gaps are open in the direction of the floating diffusion, in order to minimize the trapping of charges. In a preferred embodiment, the floating gate has a comb structure, with the tines of the comb extending toward the floating gate. Preferably, the tines or fingers are wider than the gaps. In a preferred embodiment, the gaps are no wider than 3 microns.