Detection of water entrapped in electronic components

Details Detection of water entrapped in electronic components Detection of water entrapped in electronic components

1981-11-05

1987-12-08

Yasich, Daniel M.

Measuring and testing

Moisture content or absorption characteristic of material

73 52, 356256, G01N 2100, G01M 300

Patent

active

047111186

ABSTRACT:
The accuracy of measurements made to determine the extent of water vapor trapped upon encapsulation of an electronic device is significantly enhanced by carefully controlling the measurement technique employed. In particular, the encapsulant is generally punctured and the water vapor thus released is monitored. It has been found that to obtain an accurate measurement of the magnitude of the water vapor released, this measurement must be made within 0.1 second of the time of encapsulant punctured and released into a glass system. By using an absorption technique with suitable electronics, this time requirement is fulfilled and significantly more accurate quantitative measurements of entrapped water vapor are obtained.

REFERENCES:
patent: 2412192 (1946-12-01), Agnew
patent: 2621297 (1952-12-01), Obermaier
patent: 2749744 (1956-06-01), Doudera
patent: 3636768 (1972-01-01), Tinet
patent: 4056966 (1977-11-01), Ketelsen

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