Printed circuit board with landless blind hole for connecting an

Details Printed circuit board with landless blind hole for connecting an Printed circuit board with landless blind hole for connecting an

1995-03-30

1996-04-23

Thomas, Laura

Electricity: conductors and insulators

Conduits, cables or conductors

Preformed panel circuit arrangement

174261, 174262, H05K 111

Patent

active

055105807

ABSTRACT:
A blind hole extending from upper or surface wiring of a printed circuit board to inner or lower wiring, and having an opening larger than the bottom, is formed on a substrate, and a conductor pattern is formed on the bottom and the internal wall of the blind hole to connect the inner wiring with the surface wiring.

REFERENCES:
patent: 4263341 (1981-04-01), Martyniak
patent: 4426548 (1984-01-01), Oritsuki et al.
patent: 4935284 (1990-06-01), Puerner
patent: 5034569 (1991-07-01), Gofuku et al.

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