Patent ID: 6249962
Filing Date: 2001-06-26
Classification: H05K,Y10T

Abstract:
A process for manufacturing a structure for a circuit board having a plurality of supporting layers, wherein each supporting layer bears an electrically conducting pattern and is formed from one of a plurality of different materials, each different material having a melting point which is different from the melting point of each of the other different materials which form each of the other supporting layers, the process comprising the steps of:choosing the material for a first supporting layer such that the material has a highest melting point of the other different materials used to form each of the other supporting layers;choosing the material for each of the other supporting layer such that the material forming each of the other supporting layers has a successively lower melting point than the first supporting layer;successively arranging each of the other supporting layers beginning with the first supporting layer;attaching each of the other supporting layers to the first supporting layer to form the structure by exposing the structure to a temperature which exceeds the melting point of the each of the other supporting layers but is lower than the melting point for the immediately preceding supporting layer;arranging a desired electrically conducting pattern on at least one side of each supporting layer; andconnecting the electrically conducting patterns on at least two supporting layers to each other.