Printed wiring board having a blind via

Details Printed wiring board having a blind via Printed wiring board having a blind via

1994-11-22

1996-02-20

Thomas, Laura

Electricity: conductors and insulators

Conduits, cables or conductors

Preformed panel circuit arrangement

174262, H05K 114

Patent

active

054930774

ABSTRACT:
Disclosed is a printed wiring board 1 with a through hole 5 in which a hollow portion 7 wider than both an upper opening 5A and a lower opening 5A is formed, and a solder resist film 9 is formed at the hollow portion 7 so as to firmly adhere to an inner wall of the through hole 5. Thereby, it can prevent the solder resist film 9 from being dropped out from the through hole 5 and electrical check of circuit patterns on the printed wiring board 1 can be efficiently conducted while directly setting a checker pin 13 of a checker into the through hole 5.

REFERENCES:
patent: 5113315 (1992-05-01), Capp et al.
patent: 5342999 (1994-08-01), Frei et al.
patent: 5387493 (1995-02-01), Imabayashi et al.

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