Printed circuit board

Details Printed circuit board Printed circuit board

1978-09-18

1980-09-09

Kucia, Richard R.

Electricity: conductors and insulators

Conduits, cables or conductors

Single duct conduits

361402, H05K 102

Patent

active

042219256

ABSTRACT:
A printed circuit board is disclosed which comprises a metal substrate having a first coating thereon and through holes through said coating and substrate with non-linear, undercut walls and a dielectric film coating over said first coating and said non-linear, undercut walls of said through hole. Electrical circuitry is then formed on the dielectric coat in conjunction with the through hole.

REFERENCES:
patent: 3301939 (1967-01-01), Krasnow
patent: 3377699 (1968-04-01), Dinella
patent: 3555670 (1971-01-01), Zickar
patent: 3566461 (1971-03-01), Carbonel
patent: 3738879 (1973-06-01), Siemens
patent: 3934334 (1976-01-01), Hanni

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