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:
Jul. 26, 1988
Filed:
Jun. 25, 1986
Applicant:
Inventor:
David J Burt, London, GB;
Assignee:
Primary Examiner:
Int. Cl.
CPC ...
H01L / ; H01L / ; H01L / ; H04N / ;
U.S. Cl.
CPC ...
357 24 ; 357 30 ; 35821319 ;
Abstract
A frame transfer buried channel CCD image sensor incorporating an anti-blooming drain structure (25, 27) wherein accumulation of charge of opposite polarity to that drained by the anti-blooming drain structure is prevented. This can conveniently be achieved by arranging for the buried channel diffusion (19) in each channel to stop short of the anti-blooming drain diffusion (25) on one side of each channel. As a result of the prevention of charge accumulation the anti-blooming drain structure remains effective with optical overloads much greater than the optical overload at which anti-blooming performance begins to deteriorate in conventional buried channel CCD image sensors.