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:
Jun. 19, 2001
Filed:
Apr. 01, 1999
Barret Lippey, Kanagawa, JP;
Hiroichi Ishikawa, Kanagawa, JP;
Sony Corporation, Tokyo, JP;
Abstract
An anti-reflection film having high electrical conductivity and high anti-reflection effect over a wide frequency range despite its simplified structure. The anti-reflection film has two mutually neighboring layers which are deposited directly or via a hard coating layer on a supporting layer. A first layer of the layers that is closer to a supporting layer is formed of an electrically conductive material capable of absorbing light, while the remaining second layer is formed of a material having a refractive index not higher than 2.0. If the first layer has the refractive index and the extinction coefficient for a shorter wavelength &lgr;,of n,and k,,respectively, and the refractive index and the extinction coefficient for a longer wavelength &lgr;,of n,and k,, respectively, n,is larger than n,and k,is smaller than k,(n,>n,and k,<k,).