Patent ID: 6272745
Filing Date: 2001-08-14
Classification: H05K,Y10T

Abstract:
A method for the production of a printed circuit board with at least one electrically conductive through-plating running through at least one hole in an insulating base material, the at least one hole defining walls running from a first surface of the base material to a second surface of the base material, the method comprising the steps of:adhering to the first surface of the base material a first two-layered foil comprising a first conductive foil covered with a first material layer;creating the at least one hole through the first two-layered foil and the base material;forming, after the hole creating step, a first conductive layer upon the first two-layered foil and upon the walls of the at least one hole in order to obtain at least one metalized hole;filling the at least one metalized hole completely with a fill material to obtain at least one filled hole;removing the first material layer and the first conductive layer from the first conductive foil adhered to the first surface of the base material after the step of filling the at least one metalized hole;curing the fill material in the at least one metalized hole;planarizing, after the curing step, a first conductive surface defined by the first conductive foil and the fill material by removing portions of the fill material which protrude beyond the first conductive foil; andproducing a first conductive pattern upon the first conductive foil after the first conductive surface planarizing step.