Chemistry: electrical and wave energy – Processes and products
Patent
1989-02-23
1990-04-10
Nimmo, Morris H.
Chemistry: electrical and wave energy
Processes and products
174266, 427 97, C25D 502
Patent
active
049157957
ABSTRACT:
A process is illustrated to provide plated through holes for connecting between opposite sides of a circuit board such as an insulating ceramic substrate while maintaining a smooth surface on the circuit side to facilitate the process of defining the circuit pattern. The plated-through hole process is designed to uniformly cap or plug all of the plated-through holes to prevent solder from the backside from flowing through the holes to the circuit side and damaging (short-circuitry adjacent paths) the finished product.
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patent: 3471631 (1969-10-01), Quintana
patent: 4191789 (1980-03-01), Brown et al.
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patent: 4642160 (1987-02-01), Burgess
patent: 4743710 (1988-05-01), Shieber et al.
patent: 4789760 (1988-12-01), Koyama et al.
Garms David
McKiel, Jr. Frank
Hamann H. Fredrick
Lutz Bruce C.
Nimmo Morris H.
Rockwell International Corporation
Sewell V. Lawrence
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