Printed circuit

Details Printed circuit Printed circuit

1985-10-21

1987-04-07

Kuela, R. R.

Electricity: conductors and insulators

Conduits, cables or conductors

Single duct conduits

339 17D, 361411, H05K 314

Patent

active

046563148

ABSTRACT:
An ultraviolet reactive ink is applied to a translucent substrate in the desired circuit image and partially cured to a tacky state with ultraviolet radiation. A resist material is then applied to the substrate in the negative circuit image and metallic particles are deposited on the ink by vacuum deposition. The ink is then further cured to a hardened state with ultraviolet radiation applied from both above and beneath the substrate to counteract the tendency of the metal to reflect radiation applied only from above the substrate. Finally, the resist material is removed from the substrate leaving the fully formed circuit board comprising the substrate, the fully cured ink circuit image bonded thereto, and a metallic conductive layer on the ink.

REFERENCES:
patent: Re30274 (1980-05-01), Bolon et al.
patent: 2739881 (1956-03-01), Kepple
patent: 3330695 (1967-07-01), Curran
patent: 3516855 (1970-06-01), Goll et al.
patent: 3699027 (1970-02-01), Miller
patent: 4049844 (1977-09-01), Bolon
patent: 4152195 (1979-05-01), Bahrel
patent: 4157407 (1979-06-01), Peiffer
patent: 4280888 (1981-07-01), Bush et al.
patent: 4288282 (1981-09-01), Brown et al.
patent: 4303698 (1981-12-01), Beske et al.
patent: 4327124 (1982-04-01), Des Marais, Jr.
patent: 4421944 (1983-12-01), Des Marais

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