Patent ID: 6195882
Filing Date: 2001-03-06
Classification: H05K,Y10T

Abstract:
A method for producing printed wiring boards, the method comprising the steps of:perforating through holes in an adhesive resin-based insulator sheet;filling the through holes with a conductive material;forming a conductive wiring pattern on a surface of a releasable supporting sheet;transferring the conductive wiring pattern from the surface of the releasable supporting sheet onto a surface of the adhesive resin-based insulator sheet in which the filled through holes have been formed, so as to form the wiring pattern on the surface of the adhesive resin-based insulator sheet and form an electric connection between the wiring pattern and the through holes, thereby burying the conductive wiring pattern in the adhesive resin-based insulator sheet;wherein the transferring step includes heating and pressing the adhesive resin-based insulator sheet so as to harden the adhesive resin-based insulator sheet; andremoving the releasable supporting sheets.