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:
Jul. 03, 2012
Filed:
Nov. 07, 2008
Applicants:
William J. Arora, Cambridge, MA (US);
George Barbastathis, Boston, MA (US);
Inventors:
William J. Arora, Cambridge, MA (US);
George Barbastathis, Boston, MA (US);
Assignee:
Massachusetts Institute of Technology, Cambridge, MA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02F 7/20 (2006.01);
U.S. Cl.
CPC ...
Abstract
An optical structure is provided. The optical structure includes a substrate structure. A photosensitive material layer is positioned on said substrate structure. The photosensitive material layer having uniform periodic geometry and a period length throughout associated with a 2D periodic pattern. The 2D periodic pattern includes a period length greater than the exposing light wavelength and spatial variation in the duty cycle of the features of a mask layer used in the formation of said 2D periodic pattern.