Stock material or miscellaneous articles – Structurally defined web or sheet – Including variation in thickness
Patent
1997-11-26
2000-09-26
Krynski, William
Stock material or miscellaneous articles
Structurally defined web or sheet
Including variation in thickness
428196, 428201, 428413, 4285377, B32B 300
Patent
active
061240230
ABSTRACT:
The problems are to provide a prepreg for laminate which can secure a heat resistance, electrical insulation properties and an adhesion strength of a conductor layer, a printed wiring-board which satisfies a high density and which is excellent in a heat resistance and electrical insulation properties upon utilizing the conventional production equipment and method of laminate pressing, and a process for producing the same.
A prepreg for laminate characterized in that a paper-like or fabric-like substrate is impregnated with an epoxy resin composition capable of forming a roughened surface through roughening treatment, and a laminate obtained by using the same; a printed wiring-board obtained by using the printed wiring-board and a process for producing the same, which comprises (1) a step of forming a roughened surface by subjecting the surface of the laminate to the roughening treatment, and (2) a step of forming a conductor layer on the roughened surface of the laminate; and a multi-layer printed wiring-board and a process for producing the same, which comprises (1) a step of laminating the prepreg for laminate with an inner layer material such that the prepreg is disposed on the surface, and pressing them to form a laminate, (2) a step of subjecting the surface of the laminate to the roughening treatment to form a roughened surface, and (3) a step of forming a conductor layer on the roughened surface of the laminate.
REFERENCES:
patent: 4323488 (1982-04-01), Takago et al.
patent: 5107036 (1992-04-01), Nakajima et al.
patent: 5781091 (1998-07-01), Krone et al.
Furuta Kiyonori
Yokota Tadahiko
Ajinomoto Co. Inc.
Krynski William
Shewareged B.
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