MANUFACTURE OF METALLIC BASE PRINTED BOARD

PURPOSE:To form an accurate and miniature pattern and to improve insulating reliability of an opening by coating the surface and opening of a metal plate with resin by fluidizing and dipping, then laminating a metal foil, etching the surface, forming a circuit, and then opening the resin filling hole of the plate. CONSTITUTION:An opened metal plate 5 is treated in a fluidizing and dipping tank of resin powder for forming an insulating layer of epoxy resin, polyamide, etc., the surface and opening 6 are covered with resin to form a resin insulating layer 7. A metal foil made of copper, aluminum, etc., is disposed on the layer 7, laminated, pressure molded and integrated. The obtained laminate is etched to form a circuit pattern 9 of predetermined metal conductor from the foil. After the pattern 9 is formed, holes 6 to be filled with resin of the plate 5 are opened by drills, etc.