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, 1999
Filed:
Jan. 30, 1997
Applicant:
Inventor:
Katuya Terai, Tokyo, JP;
Assignee:
NEC Corporation, , JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C03C / ; C03C / ;
U.S. Cl.
CPC ...
501 32 ; 501-5 ; 501-6 ; 501-7 ;
Abstract
A glass-ceramic composite which has forsterite in an amount of 40 to 60% by weight is included in crystallized glass having a coefficient of thermal expansion of 100.degree. to 200.times.10.sup.-7 /.degree.C. is used to configure a package, to the electrode pads of which a quartz crystal is directly soldered, without any supporting material. A quartz crystal piece is included within a flat package that use a glass-ceramic composite according to the present invention, thereby greatly limiting the variation in resonance characteristics with respect to heat treating done when the package is sealed, as compared to previous packages.