Electricity: measuring and testing – Fault detecting in electric circuits and of electric components – Using radiant energy
Patent
1993-01-21
1994-05-10
Wieder, Kenneth A.
Electricity: measuring and testing
Fault detecting in electric circuits and of electric components
Using radiant energy
324530, 324537, 324 96, 324158R, 359 74, 359 84, G01R 3100, G01R 31302, G02F 113
Patent
active
053111370
ABSTRACT:
A nondestructive noninvasive device and method for testing printed circuit boards (PCBs) through the utilization of a liquid crystal material which visually images the electric fields of the PCBs. Circuit faults resulting in a change of current flow in a PCB produce recognizable changes in observed electric fields. The present invention may be used in a stand-alone mode or as a supplement to other testing techniques.
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Berg Michael F.
Chang David B.
Drummond James
Pollack Slava A.
Brown Glenn W.
Denson-Low Wanda K.
Hughes Aircraft Company
Wieder Kenneth A.
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