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:
May. 18, 2010
Filed:
Nov. 03, 2006
Narutoshi Shimatani, Otsu, JP;
Toshimasa Kanai, Otsu, JP;
Ukon Ishihara, Otsu, JP;
Takeshi Nagata, Otsu, JP;
Tsutomu Imamura, Otsu, JP;
Narutoshi Shimatani, Otsu, JP;
Toshimasa Kanai, Otsu, JP;
Ukon Ishihara, Otsu, JP;
Takeshi Nagata, Otsu, JP;
Tsutomu Imamura, Otsu, JP;
Nippon Electric Glass Co., Ltd., Shiga, JP;
Abstract
A substrate is made of a crystallized glass having translucency and an average linear thermal expansion coefficient of −5×10/° C. at 30 to 500° C. The substrate has a first surface (working surface) of a smooth surface having a surface roughness Rmax of less than 0.5 μm, and a second surface (non-working surface) of a rough surface having a surface roughness Rmax of 4 μm. A light shielding layer consisting of a light shielding film and an antioxidant film is formed on the second surface of the substrate through sputtering.