Method of making a circuit board having burr free castellated pl

Details Method of making a circuit board having burr free castellated pl Method of making a circuit board having burr free castellated pl

1999-05-20

2000-08-22

Arbes, Carl J.

Metal working

Method of mechanical manufacture

Electrical device making

29846, 29829, 174262, 174266, H01K 310

Patent

active

061052469

ABSTRACT:
The present invention provides a method of creating a circuit board having burr free castellated plated through holes. In particular, the leading edge of the plated through hole, that tends to produce burr formation using conventional profiling methods, is removed or pre-profiled. The pre-profiled plated through hole is then profiled at a distance slightly off-set from the pre-profiled edge to further prevent burr formation.

REFERENCES:
patent: 3357099 (1967-12-01), Nagy
patent: 4372046 (1983-02-01), Suzuki
patent: 4543715 (1985-10-01), Iadarola et al.
patent: 4790894 (1988-12-01), Homma et al.
patent: 5499446 (1996-03-01), Murakami
patent: 5499447 (1996-03-01), Murakami

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