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:
Sep. 17, 1991
Filed:
Feb. 20, 1990
Kazuo Miwada, Tokyo, JP;
NEC Corporation, Tokyo, JP;
Abstract
A charge coupled device comprises a plurality of photo electric converting elements of the p-n junction diode type, and the photo electric converting elements are coupled to associated vertical shift registers through gate transistors, in which n-type impurity region of each photo electric converting element has a wide portion accumulating electric charges produced in the presence of an optical radiation and a narrow portion partially overlapped with a transfer gate electrode of the gate transistor and having a width not allowing any narrow channel phenomenon to take place, so that no residual electric charges is left in the n-type impurity region without producing any potential barrier between the wide and narrow portions.