Pressure contact open-circuit detector

Details Pressure contact open-circuit detector Pressure contact open-circuit detector

1994-01-21

1996-02-27

Arbes, Carl J.

Metal working

Method of mechanical manufacture

Electrical device making

2940707, 156 64, 228 11, 2281101, H05K 334, B23K 106

Patent

active

054937752

ABSTRACT:
A method and apparatus for non-destructively detecting pressure contact open types of solder connections transmits acoustic emissions through an electronic component and the carrier upon which the electronic component is mounted by one or more solder connections. Emissions which are transmitted through the solder connections and which will interact with acoustic emissions generated if pressure contact opens are present are analyzed by comparison with the signal which is used to cause emissions to detect the presence of pressure contact opens by comparison of one or more of harmonics, energy, count, voltage, duration, rise time and time delay. A housing is preferably used to position a pair of transducers at respective locations which have solder connections topologically intervening therebetween. The testing process can thus be automated for screening assembled devices for the presence of pressure contact opens.

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