Electricity: measuring and testing – Conductor identification or location – Inaccessible
Patent
1986-05-19
1988-10-04
Envall, Jr., Roy N.
Electricity: measuring and testing
Conductor identification or location
Inaccessible
324 65R, G01R 2702
Patent
active
047758317
ABSTRACT:
Liquid-phase moisture is detected in sealed integrated circuit packages by measuring the conductance and capacitance of the integrated circuit at a temperature which is above temperatures which allow moisture to condense; and remeasuring the conductance and capacitance of the integrated circuit at a temperature which allows any moisture present to condense on the integrated circuit. The conductance of the integrated circuit is expected to rise sharply with the condensation of water on its surface.
REFERENCES:
patent: 3479862 (1969-11-01), Trapp et al.
patent: 3943557 (1976-03-01), Frazee et al.
patent: 4050048 (1977-09-01), Frazee
patent: 4224565 (1980-09-01), Sosniak
patent: 4272986 (1981-06-01), Lowry et al.
Auton William G.
Envall Jr. Roy N.
Fuller Leon K.
Singer Donald J.
The United States of America as represented by the Secretary of
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