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:
Sep. 17, 2002
Filed:
Jun. 12, 1998
Paul M. Moore, Burlingame, CA (US);
National Semiconductor Corporation, Santa Clara, CA (US);
Abstract
A light absorbing thin film stack is placed in an upper interconnect level of a pixel cell of an LCD light valve to prevent transmission of light from the small gap between adjacent pixel electrodes into the silicon substrate. The light absorbing thin film stack includes a surface layer combination formed over a highly absorbing backstopping layer. Incident light is absorbed by the backstopping layer. Light reflected by the surface layer combination and/or the backstopping layer is extinguished by destructive interference. This destructive interference is generated by a change in the phase angle caused by the differing optical properties of the various layers of the light absorbing thin film stack.