Coating processes – Electrical product produced – Integrated circuit – printed circuit – or circuit board
Patent
1974-04-29
1976-08-31
Welsh, John D.
Coating processes
Electrical product produced
Integrated circuit, printed circuit, or circuit board
427 96, 427102, 427269, 427259, B44D 118
Patent
active
039782492
ABSTRACT:
A method is disclosed for producing intricate metal designs bonded to glass such as required in electrical resistance heating circuits, microwave oven panel shields and the like. The method includes the application to a sheet of glass of the negative of the desired design by silk screening or other screening techniques utilizing a screenable pasting agent which screens through the negative pattern and adheres temporarily to the glass. The entire sheet of glass is then coated with the desired metal, usually aluminum, according to known metallizing techniques in which flame-atomized metal is applied to the heated glass sheet and thus bonds thereto. The metallized surface is then brushed with wire rotary brushes which remove the metal from those areas where the screenable pasting agent has been applied. After washing, further wet brushing, rinsing and drying, the positive desired design in metal remains securely bonded to the glass.
REFERENCES:
patent: 2559969 (1951-07-01), Kennedy
patent: 3249467 (1966-05-01), Stookey
patent: 3617373 (1968-05-01), Mott
ASG Industries Inc.
Welsh John D.
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