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:
Jul. 02, 1991
Filed:
Apr. 13, 1989
Applicant:
Inventors:
Kanji Murakami, Mito, JP;
Mineo Kawamoto, Hitachi, JP;
Akio Tadokoro, Ibaraki, JP;
Haruo Akahoshi, Hitachi, JP;
Toshikazu Narahara, Ibaraki, JP;
Ritsuji Toba, Hadano, JP;
Toshiaki Ishimaru, Hitachi, JP;
Nobuyuki Hayashi, Hitachi, JP;
Motoyo Wajima, Yokohama, JP;
Assignees:
Hitachi, Ltd., Tokyo, JP;
Hitachi Chemical Co., Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G03C / ;
U.S. Cl.
CPC ...
430315 ; 430314 ; 430318 ; 430329 ; 430330 ;
Abstract
The present invention provide a process for producing printed circuit boards which comprises the steps of