Patent ID: 8303752
Filing Date: 2012-11-06
Classification: B32B,H05K,Y10T

Abstract:
1. A method of manufacturing a wiring board comprising the steps of: preparing a support substrate; providing, on the support substrate, a first composite body having a thermally foamable adhesive layer containing a thermal foaming agent and an adhesive layer, to have the thermally foamable adhesive layer attached to the support substrate; providing, on the first composite body, a second composite body such that the first composite body is between the support substrate and the second composite body, the second composite body having carrier-foil coated metal foil, which includes a carrier foil layer and a metal foil layer, and a resin insulating layer formed on the metal foil layer, to have the carrier foil layer attached to the first composite body, wherein the carrier-foil coated metal foil is formed by bonding the metal foil layer and the carrier foil layer via or with organic compound; forming the stacked layers structure on the second composite body such that the second composite body is between the first composite body and the stacked layers structure, the stacked layers structure including a conductive layer and an insulating layer; then, heating the thermally foamable adhesive layer to separate the support substrate from the first composite body, the second composite body, and the stacked layers structure; and thereafter, separating the metal foil layer and the stacked layers structure from the carrier foil layer and the first composite body at a boundary between the carrier foil layer and the metal foil layer.