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:
Feb. 09, 1988
Filed:
Dec. 11, 1986
Yamahiro Iwasa, Hachioji, JP;
Asahi Chemical Research Laboratory Co., Ltd., Tokyo, JP;
Abstract
A method is described for producing multilayer circuits including a resistor circuit on one side of a copper laminated base board, wherein the base board is etched to provide a plurality of circuits of a first layer, effectively processed with a plating-resistant resist and an electrically conductive copper paste to form a plurality of circuits of a second layer, immersed in a metal plating solution to provide a metal plating layer on the copper paste to thereby form the circuits of the second layer on the circuits of the first layer, coated with an electrically conductive paste to provide a pair of electric terminals between two of the circuits of the second layer, and coated with an electrically resistant resist of a predetermined electric resistance value on a part extended between the two electric terminals.