Producing printed circuits by conjoining metal powder images

Details Producing printed circuits by conjoining metal powder images Producing printed circuits by conjoining metal powder images

1978-02-01

1980-11-18

Kendall, Ralph S.

Coating processes

Electrical product produced

Integrated circuit, printed circuit, or circuit board

427 96, 427 98, 427191, 427192, 427367, 430319, H01K 100

Patent

active

042346266

ABSTRACT:
By the process of this invention, printed circuits are prepared containing an electrically conductive wiring trace from materials having adherent and non-adherent surface areas, e.g., printed circuit substrates bearing an imaged photoadhesive layer. Onto the adherent surface areas of the material are applied ductile metal or alloy particles, and any excess particles are removed from the non-adherent areas. The metallized areas are conjoined, e.g., with silicon carbide brush or rounded metal rod. The conjoined areas can be electrolessly plated, electroplated or soldered. Multilayer printed circuits can also be prepared by repeating these steps with additional layers of photoadhesive material adhered to underlying printed circuits.

REFERENCES:
patent: 3060024 (1962-10-01), Burg
patent: 3330695 (1967-07-01), Curran
patent: 3391455 (1968-07-01), Hirohita
patent: 3506482 (1970-04-01), Hirohita
patent: 3554793 (1971-01-01), Kriger
patent: 3593677 (1971-07-01), McLain
patent: 3637385 (1972-01-01), Hayes
patent: 3649268 (1972-03-01), Chu
patent: 3703603 (1972-11-01), Levesque
patent: 3781968 (1974-01-01), Yumagishi
patent: 3859722 (1975-01-01), Kinsky
patent: 4022371 (1977-10-01), Skervinko
patent: 4054479 (1977-10-01), Pieffer
patent: 4054483 (1977-10-01), Peiffer

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