Sintered glass-ceramic substrates containing multi-level, interconnected thick-film circuit patterns of highly conductive metals such as gold, silver or copper are provided which can be fired in air (for gold and silver) or in neutral atmospheres (for copper) at temperatures below the melting points...http://www.google.es/patents/US4301324?utm_source=gb-gplus-sharePatente US4301324 - Glass-ceramic structures and sintered multilayer substrates thereof with circuit patterns of gold, silver or copper
Glass-ceramic structures and sintered multilayer substrates thereof with ...
