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:
Nov. 27, 2012
Filed:
Jan. 10, 2011
Applicants:
Jianping Yang, Shanghai, CN;
Herb Huang, Shanghai, CN;
Jieguang Huo, Shanghai, CN;
Inventors:
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01L 31/0232 (2006.01);
U.S. Cl.
CPC ...
Abstract
An image sensor includes an array of photo-sensing regions formed in a semiconductor substrate, a dielectric layer over the array of photo-sensing regions, and an array of microlenses formed in the dielectric layer. Each of the microlenses is center-aligned over one of the photo-sensing regions and has a truncated plano-convex shape. The microlenses have an index of refraction that is higher than the dielectric layer's refraction index. Each of the microlenses has a smooth circular top, a flat circular bottom, and a curved circumferential side convex towards the semiconductor substrate.