Patent ID: 6739040
Filing Date: 2004-05-25
Classification: H05K,Y10T

Abstract:
A method of manufacturing a multilayered printed wiring board using an adhesive film wherein the adhesive film comprises a support base film on which a mold release layer and a thermosetting resin composition layer are present, wherein the mold release layer is proximal to the support base film and the resin composition layer is laminated on the surface of the mold release layer, and wherein said resin composition layer is the same area as or smaller area than that of the support base film, has thermal fluidity and is solid at normal temperatures,said method comprises: a) directly covering a pattern processed portion on one surface or both surfaces of a pattern processed circuit substrate with the resin composition layer of said adhesive film, and heat laminating and pressurizing under a vacuum; b) thermally curing the resin composition with the support base film being attached thereto; c) uncovering the resin composition layer by stripping at least the support base film followed by perforating, or perforating followed by stripping at least the support base film; d) roughing the resin composition surface; and e) subsequently plating the roughed surface, whereby a conductor layer is formed.