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. 03, 1976
Filed:
Mar. 12, 1974
Commissariat a l'Energie Atomique, Paris, FR;
Abstract
A charge-coupled device in which the storage and tranfer of information in the form of charges consisting of minority carriers are carried out with only two clocks. The device comprises a doped semiconductor substrate coated with an insulating thin film carrying a linear series of conductive electrodes. A variably doped surface region of the substrate creates a potential barrier for the minority carriers upstream of a charge-storage region. The same value of potential is fixed respectively for the odd-numbered electrodes and for the even-numbered electrodes, these values being modified in cycles so as to transfer the charge from each alternate electrode to one of the adjacent electrodes. A method of fabrication of the device consists in forming an insulating film and an assembly of conductive electrodes on a semiconductor substrate and in ion implantation by means of an ion beam in order to increase the doping of the substrate beneath one edge of the electrodes.