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. 12, 2006
Filed:
Aug. 04, 2004
Takahiro Matano, Otsu, JP;
Satoru Yoshihara, Otsu, JP;
Takahiro Matano, Otsu, JP;
Satoru Yoshihara, Otsu, JP;
Nippon Electronic Glass Co., Ltd., Shiga-Ken, JP;
Abstract
The optical communication device substrate according to the present invention includes one of ceramic and glass ceramic each having an average thermal expansion coefficient of −55 to −120×10°/C. in the temperature range of −40 to +100°C. and each containing one of a β-quartz solid solution and a β-eucryptite solid solution as a main crystal. In the substrate, maximum thermal expansion hysteresis that occurs when temperature rise from −40°C.to 100°C. at a rate of 1°C./min and temperature lowering from −100°C.to −40°C. at a rate of 1°C./min are performed is less than 12 ppm.