PRINTABLE COMPOSITIONS, AND THEIR APPLICATION TO DIELECTRIC SURFACES USED IN THE MANUFACTURE OF PRINTED CIRCUT BOARDS.

摘要

A COMPOSITION FOR USE IN THE PRODUCTION OF METAL TRACES AND OTHER METAL COMPONENTS OF PRINTED CIRCUIT BOARDS, WIRING BOARDS AND THE LIKE COMPRISES THE FOLLOWING COMPONENTS: (A) A METAL POWDER, (B) A SOLDER POWDER, (C) A POLYMER OR A MONOMER WHICH IS POLYMERISABLE TO YIELD A POLYMER, A SAID POLYMER BEING CROSSLINKABLE UNDER THE ACTION OF A CHEMICAL CROSS-LINKING AGENT, AND (D) A CHEMICAL CROSS-LINKING AGENT FOR SAID POLYMER, THE CROSS-LINKING AGENT HAVING FLUXING PROPERTIES AND BEING UNREACTIVE WITH THE POLYMER WITHOUT CATALYSIS. THE POLYMER WILL GENERALLY BE AN EPOXY RESIN AND THE CROSS-LINKING AGENT WILL GENERALLY BE A POLYACID. THE COMPOSITION PREFERABLY IS ONE IN WHICH THE METAL POWDER AND/OR SOLDER POWDER GENERATES AND/OR HAS ADHERED THERETO A CATALYST FOR THE CROSS-LINKING AGENT WHICH IS LIBERATED ON APPLICATION OF HEAT.(FIG 1)