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:
Aug. 05, 1980
Filed:
May. 12, 1978
Yorio Iwasaki, Shimodate, JP;
Toshiro Okamura, Shimodate, JP;
Akishi Nakaso, Oyama, JP;
Nobuo Uozu, Shimodate, JP;
Hiroshi Takahashi, Kasama, JP;
Hitachi Chemical Company, Ltd., Tokyo, JP;
Abstract
A method of improving adhesion between the surface of a substrate and a metal deposit electrolessly plated thereon by forming a novel adhesive material layer comprising (A) a rubber material and (B) a thermosetting resin which is present in a proportion defined by the formula 20.ltoreq.(B)/(A)+(B).ltoreq.85 volume %. In the adhesive layer the thermosetting resin is dispersed, in the form of substantially spherical particles of 0.5 to 15.mu., in the continuous phase of the rubber material. The method is useful for producing printed circuit boards having a high precision and high accuracy pattern circuit. Further, the method is extremely advantageous when it is applied to the so-called photo-forming process since disappearance of the catalyst nuclei on the circuit pattern image can be eliminated.