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:
Dec. 06, 2005
Filed:
Aug. 30, 2002
Eric Pourquier, Voreppe, FR;
Philippe Rommeveaux, Coublevie, FR;
Eric Pourquier, Voreppe, FR;
Philippe Rommeveaux, Coublevie, FR;
Atmel Grenoble S.A., Saint Egreve, FR;
Abstract
The invention relates to the making of color image sensors for miniature cameras. The method of fabrication includes the formation on the front face of a semi-conductive wafer of a series of active zones comprising image detection circuits, each corresponding to a respective image sensor. Each active zone is surrounded by input/output pads. The wafer is transferred by its front fact against the front face of a supporting substrate. The major part of the thickness of the semiconductor wafer is eliminated, leaving a very fine semi-conductive layer including the image detection circuits on the substrate. This method is characterized in that firstly, layers of color filters are deposited and then etched on the semi-conductive layer thus thinned. Secondly, the substrate includes connection pads laid out with the same geometry as the pads of each active zone so as to come into a position facing these pads during the transfer, to solder a respective pad of the substrate to a corresponding pad of the semi-conductive wafer. Finally, the substrate is diced into individual sensors after the deposition of the color filters.