Manufacture of metallic base printed board

Abstract

Abstract 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 in which predetermined portions are opened with resin by fluidizing and dipping, then forming a circuit with conductive paste, and forming through holes as required. 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. After a circuit 8 is formed with conductive paste on the layer 7, holes 6 to be filled with resin of the plate 5 are opened. Further, if necessary, through hole conductive layers 9 are formed in the holes 6 by means, such as through hole plating or conductive paste coating, etc.

Inventors

• 👤 Munehiko Fukushima

Bibliographic Details