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:
Nov. 09, 2004
Filed:
Aug. 30, 2001
Hirayoshi Tanei, Yokohama, JP;
Tsuyoshi Fujita, Yokohama, JP;
Masato Kirigaya, Yokohama, JP;
Yasuo Akutsu, Mito, JP;
Kaoru Uchiyama, Oomiya, JP;
Hiroshi Soma, Johoku, JP;
Hiroatsu Tokuda, Hitachinaka, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
The present invention has an object to enhance the reliability of the electrical connection of a silver-based conductor film on the surface of a glass ceramic board. In order to achieve the object, according to the present invention, by the use of a conductor paste containing a silver particle having a specific surface area of 0.3 m /g to 3.0 m /g and no glass, printing is carried out on a glass ceramic board and the conductor paste is fired at a firing temperature having a difference of ±50° C. from a softening temperature of amorphous borosilicate glass contained in the glass ceramic. Consequently, a silver-based conductor film having high reliability of the electrical connection is formed on the ceramic board.