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:
Jun. 16, 1998
Filed:
Mar. 06, 1996
Junzo Fukuta, Nagoya, JP;
Toshihiro Nakai, Nagoya, JP;
Sumitomo Metal (SMI) Electronics Devices Inc., Yamaguchi, JP;
Abstract
A silver-based electrically conductive paste used for printing on green sheets of a low-temperature firable ceramic comprising a CaO--Al.sub.2 O.sub.3 --SiO.sub.2 --B.sub.2 O.sub.3 --system glass and Al.sub.2 O.sub.3, wherein a silver-based powder in the conductive paste has a specific surface area in the range of 0.1 to 0.5 m.sup.2 /g and the formation of a scratch begins when the value measured with a grind gage for the paste containing an organic resin and an organic solvent is in the range of 30 to 10 .mu.m. The silver-based conductive paste makes it possible to co-fire with a low-temperature firable ceramic substrate without causing the warping of the substrate and, therefore, is very useful for the formation of wiring conductors of internal layers of a multilayer circuit substrate of the low-temperature firable ceramic.