Method for detecting missing circuit board components

Details Method for detecting missing circuit board components Method for detecting missing circuit board components

1988-12-30

1990-10-16

Hannaher, Constantine

Radiant energy

Luminophor irradiation

Methods

250302, 2504611, G07C 314, G01J 138, G01J 554

Patent

active

049637525

ABSTRACT:
Empty component locations are detected on an assembled circuit board where the component locations are marked with spots of a fluorescent substance before assembly. The circuit board is exposed to stimulating radiation by a radiation source causing luminescence from the spots of fluorescent substance on which the stimulating radiation is impinged. The circuit board is then examined for the luminescence to determine whether the components are between the spots and the radiation source.

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patent: 4697923 (1987-10-01), Jones et al.

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