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. 05, 1995
Filed:
Jun. 24, 1994
Applicant:
Inventors:
Kiyonori Kogawa, Hiratsuka, JP;
Nobuaki Ooki, Hadano, JP;
Masami Kawaguchi, Hadano, JP;
Motoyo Wajima, Yokohama, JP;
Haruo Akahoshi, Hitachi, JP;
Akira Nagai, Hitachi, JP;
Assignee:
Hitachi, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B44C / ;
U.S. Cl.
CPC ...
1566291 ; 156313 ; 216 33 ; 427 98 ; 427305 ;
Abstract
The present invention provides a printed circuit board which is high in acid resistance, mechanical strength at high temperature and bond strength, a method for making the printed circuit board and an apparatus used for making the printed circuit board. The technique of the present invention is characterized in that a metallic film having metal particles discretely distributed therein is provided on a roughened surface of copper circuit pattern on an insulating substrate which has been oxidized to form copper oxide and thereafter reduced.