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:
Jan. 03, 1995
Filed:
Feb. 15, 1994
Applicant:
Inventor:
Naoki Kato, Kanagawa, JP;
Assignee:
Sony Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04N / ;
U.S. Cl.
CPC ...
348248 ; 257221 ;
Abstract
A CCD imager includes at least one four-phase vertical shift register having first, second, third and fourth transfer electrodes. In order to prevent nonuniform distribution of smear charge and other unwanted charge, and improve the quality of a picture, there is further provided a means for making the potential well under each first electrode deeper than the potential wells under the second, third and fourth electrodes. Preferably, a N-type semiconductor region is formed under each first electrode by ion implantation.