Method of making printed circuits

Claim 1

2. THE PROCESS OF PREPARING A PLASTIC SHEET HAVING A FLUSH PRINTED CIRCUIT OF PREDETERMINED CONFORMATION AND THICKNESS COMPRISING THE STEPS OF: PROVIDING A STAINLESS STEEL BACKING PLATE HAVING A SMOOTH CONTINUOUS SURFACE, SILK-SCREENING AN ELECTRICALLY NON-CONDUCTIVE MASK ONTO SAID SMOOTH CONTINUOUS SURFACE OF THE BACKING PLATE TO DEFINE A WINDOW IN THE SHAPE OF THE BACKING PLATE TO DEPOSIT ING SAID MASKED SUARFACE OF THE BACKING OLATE TO DEPOSIT THE CIRCUIT THROUGH THE WINDOW ONTO THE BACKING PLATE IN A SEMI-ADHERENT DEPOSIT; REMOVING THE MASK, THEREBY LEAVING SAID PRINTED CIRCUIT EMBOSSED ON SAID SMOOTH SURFACE OF THE BACKING PLATE; PRESSING A SHEET OF UNCURED THERMOSETTING RESIN AGANIST THE SIDE OF THE BACKING PLATE HAVING SAID CIRCUIT EMBOSSED THEREON TO EMBED THE CIRCUIT IN THE RESIN, CURING THE RESIN TO SET IT; AND THEN SEPARATING SAID CURED RESIN SHEET WITH SAID CIRCUIT EMBEDDED THEREIN FROM THE SMOOTH CONTINUOUS SURFACE OF SAID BACKING PLATE, THEREBY RESTORING SAID STAINLESS STEEL BACKING PLATE TO SUBSTANTIALLY ITS ORIGINAL CONDITION.