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:
Dec. 22, 1998
Filed:
Nov. 10, 1997
Applicant:
Inventors:
Junji Nishii, Ikeda, JP;
Hiroshi Yamanaka, Ikeda, JP;
Assignee:
Agency of Industrial Science & Technology, Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
C03C / ; B32B / ;
U.S. Cl.
CPC ...
501 54 ; 501 55 ; 20419215 ; 20419223 ; 428426 ; 428428 ;
Abstract
A glass material variable in volume by irradiation with ultraviolet light has a GeO.sub.2 --SiO.sub.2 glass composition having a GeO.sub.2 content of 0.5 to 90 mol %, and is in the form of a thin film formed in an argon atmosphere or in an argon-oxygen mixed gas atmosphere by the high-frequency sputtering method.