Electricity: measuring and testing – Impedance – admittance or other quantities representative of... – Lumped type parameters
Patent
1988-08-01
1990-07-03
Eisenzopf, Reinhard J.
Electricity: measuring and testing
Impedance, admittance or other quantities representative of...
Lumped type parameters
324554, 324640, 324699, 324707, G01R 2700, G01R 2720
Patent
active
049394690
ABSTRACT:
A method for evaluating characteristics of a printed wiring board by measuring the alternating current impedance spectra of the printed wiring board conductor pattern. The method is useful in evaluating a number of different characteristics, such as moisture content, delamination, interlayer thickness and surface characteristics.
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"Corrosion '85", by Kindig et al, paper #74, Intern. Corrosion Forum, 3/29/85.
Ludwig Frank A.
McHardy John
Burns W.
Denson-Low W. K.
Eisenzopf Reinhard J.
Hughes Aircraft Company
Lachman M. E.
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