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:
Oct. 10, 1995
Filed:
Aug. 17, 1993
Sumitomo Metal Ceramics Inc., Yamaguchi, JP;
Abstract
A ceramic circuit substrate is fabricated by preparing ceramic greensheets for the fabrication of the ceramic circuit substrate, and unsintered ceramic sheets unsinterable at a sintering temperature of said ceramic greensheets, forming via holes in said ceramic greensheets and filling the via holes with via hole conductor paste, printing conductive patterns on the ceramic greensheets, stacking and laminating the ceramic greensheets to prepare a laminated body, placing said unsintered ceramic sheets on the uppermost layer and-on the lowermost layer of the laminated body, bonding the sheets together by thermocompression to prepare a compressed body, firing the compressed body at the sintering temperature of ceramic greensheets, and removing the unsintered ceramic greensheets, wherein said via hole conductors are only in connection with the conductive patterns at the upper and/or lower ends of each via hole conductor.