Stock material or miscellaneous articles – Structurally defined web or sheet – Discontinuous or differential coating – impregnation or bond
Patent
1997-05-12
2000-01-04
Jones, Deborah
Stock material or miscellaneous articles
Structurally defined web or sheet
Discontinuous or differential coating, impregnation or bond
174255, 174258, 428901, B32B 300
Patent
active
060107685
ABSTRACT:
It is to provide a multilayer printed circuit board having excellent resolution, interlaminar insulation property and resistance to cool-heat shock without forming unevenness on the surface and lowering peel strength even if the thickness of the resin insulating layer is thin. The invention proposes a multilayer printed circuit board comprising an upper conductor circuit layer, a lower conductor circuit layer and a resin insulating layer electrically insulating both the conductor circuit layers, in which the resin insulating layer is a composite layer comprised of an layer made from a heat-resistant resin hardly soluble in acid or oxidizing agent as a lower layer and an adhesive layer for electroless plating made from a heat-resistant resin as an upper layer, and if necessary, a resin is filled in a concave portion created between conductor insulating circuits of the lower layer so as to render the surface into the same plane as the surface of the conductor circuit.
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International Search Reports (English and Japanese language versions).
Asai Motoo
Hiramatsu Yasuji
Ishitani Yoshifumi
Kawade Masato
Kawamura Yoichiro
Ibiden Co. Ltd.
Jones Deborah
Lam Cathy F.
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