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:
Mar. 02, 2010
Filed:
Nov. 26, 2007
Katsushi Ono, Ichikawa, JP;
Yoshiyuki Abe, Ichikawa, JP;
Yukio Tsukakoshi, Ichikawa, JP;
Sumitomo Metal Mining Co., Ltd., Tokyo, JP;
Abstract
A heat-resistant, light-shielding film having high light shielding capacity, high heat resistance, high sliding characteristics, low surface gloss and high electroconductivity, and useful for optical device parts, e.g., shutter or aperture blades for digital cameras and digital video cameras, and aperture blades for adjusting light intensity for projectors; method for producing the film; and aperture and light intensity adjusting device using the film. The heat-resistant, light-shielding film comprising a heat-resistant resin film base (A) resistant to 200° C. or higher, coated, on one or both sides, with an Ni-base metallic film (B) having a thickness of 50 nm or more by sputtering and then with a low-reflectivity film (C) of Ni-base oxide also by sputtering, and having a surface roughness (arithmetic average height Ra) of 0.1 to 0.7 μm.