Contactless test method for testing printed circuit boards

Details Contactless test method for testing printed circuit boards Contactless test method for testing printed circuit boards

1992-03-30

1993-06-08

Nguyen, Vinh

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

With rotor

324 95, G01R 3128

Patent

active

052182940

ABSTRACT:
This application describes a novel method and its implementation for testing unpopulated and populated electronic printed circuit boards (PCBs). This method can be used to develop a new contactless test system (CTS). While eliminating drawbacks of existing test systems, this method measures electromagnetic near field distribution in the vicinity of a PCB, contactlessly, by using suitable sensors (possibly printed near field planar antennas) and sensitive measuring and processing devices. The electromagnetic fields (EMF) are generated by the distribution of charges and currents on paths and elements of the board under test (BUT). Therefore, accurate and repeatable measurements of these fields produce a specific pattern for the BUT. Such a pattern is then compared to a known pattern for the same type of board to determine whether the BUT is faulty or nonfaulty.

REFERENCES:
patent: 3327212 (1967-06-01), Taub et al.
patent: 3631473 (1986-12-01), Honda
patent: 4507605 (1985-03-01), Geisel
patent: 4704614 (1987-11-01), Poirier et al.
patent: 4829238 (1989-05-01), Goulette et al.

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