Process for producing multilayer printed wiring board

Details Process for producing multilayer printed wiring board Process for producing multilayer printed wiring board

2004-03-03

2010-02-16

Tugbang, A. Dexter (Department: 3729)

Metal working

Method of mechanical manufacture

Electrical device making

C174S258000, C174S259000, C427S097600, C427S099200

Reexamination Certificate

active

07661190

ABSTRACT:
A process for producing a multilayer printed wiring board, comprising providing an uncured or partly-cured resin layer from a curable composition comprising an insulation polymer and a curable agent, the resin layer superimposed on an internal layer substrate having a first conductive layer as an outermost layer; bringing the surface of the resin layer into contact with a compound having a structure capable of coordination with a metal; curable the resin layer to thereby form an electrical insulation layer; oxidizing the surface of the obtained electrical insulation layer until the surface average roughness (Ra) of the electrical insulation layer falls within the range of 0.05 to less than 0.2 μm and the surface ten-point average roughness (Rzjis) thereof within the range of 0.3 to less than 4 μm; and forming a second conductive layer on the electrical insulation layer by plating operation. There is further provided a multilayer printed wiring board produced by the process. This multilayer printed wiring board excels in pattern adhesion to substrates, even those of large size.

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Surface Texture From Ra to Rz, http://www.mmsonline.com/articles/1102gage.html.

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