Patent ID: 9066459
Filing Date: 2015-06-23
Classification: H05K

Abstract:
1. A method of manufacturing a multilayer printed wiring board, the method comprising: providing a carrier foil assembly, the carrier foil assembly including at least a copper foil layer, a release layer, a heat-resistant metal layer, and a carrier foil layer, wherein a thickness of the carrier foil layer is greater than a thickness of the copper foil layer; providing a supporting substrate by laminating an insulating layer to a surface of the carrier foil layer; providing a build-up wiring layer on a surface of the copper foil layer to manufacture a supporting substrate/build-up wiring layer assembly; separating the supporting substrate/build-up wiring assembly at the release layer in the supporting substrate to manufacture a multilayered laminate, such that the release layer, the heat-resistant metal layer, and the carrier foil layer are integrally separated together, wherein the insulating layer remains laminated to the surface of the carrier foil layer; and processing the multilayered laminate to manufacture a multilayer printed wiring board.