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:
May. 29, 2012
Filed:
Oct. 30, 2008
Applicant:
Daniel Gaebler, Apolda Ot Sulzbach, DE;
Inventor:
Daniel Gaebler, Apolda Ot Sulzbach, DE;
Assignee:
X-Fab Semiconductor Foundries AG, Erfurt, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01L 21/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
In an integrated circuit, a light sensitive area is protected against radiation by arranging a light blocking layer sequence () on top of the light sensitive area. The light blocking layer sequence comprises one or several metal layers () and a silicon layer () for the purpose of absorption. A moth eye structure is provided on the silicon layer. Thereby, a radiation incident by reflection is minimized in such a way that also stray light can effectively be kept from the light sensitive area below the light blocking layer sequence ().