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:
Mar. 24, 1998
Filed:
Dec. 19, 1996
Yoshiyuki Shioyama, Kawasaki, JP;
Hidenori Shibata, Kawasaki, JP;
Kabushiki Kaisha Toshiba, Kawasaki, JP;
Abstract
According to the present invention, there is provided a solid-state imaging device that has a two-layer transfer electrode structure and is based on a four-phase driving all-pixel reading scheme. The transfer gate electrodes for taking the signal charges out of the photodiode PD and transferring them vertically are formed so that the polysilicon electrodes of a first layer and the polysilicon electrodes of a second layer may each have a specific gate length and be in contact with the gate insulating film on a silicon substrate. If four-phase transfer clocks are .phi.1 to .phi.4, the clocks will be applied to the transfer gate electrodes 31, 32 repeatedly in this order for a single pixel (photodiode PD): the second-layer electrode (.phi.2)--the second-layer electrode (.phi.3)--the first-layer electrode (.phi.4)--the first-layer electrode (.phi.1).