Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – With rotor
Patent
1977-02-15
1978-07-18
Rolinec, Rudolph V.
Electricity: measuring and testing
Measuring, testing, or sensing electricity, per se
With rotor
324158P, 339118R, G01R 106, G01R 3122, H01R 304
Patent
active
041018303
ABSTRACT:
The disclosed apparatus provides a mercury electrode for making non-destructive tests, especially for Schottky-diode tests of semi-conductors such as silicon. By developing vacuum under a test wafer on a support, a column of mercury is drawn into contact with the test wafer through a bore in the support that accurately establishes the area of the contact. The vacuum system also holds the test wafer securely in position, it avoids spillage of mercury, and additional circuit-completing contact can be made to the wafer with independently controlled pressure.
REFERENCES:
patent: 3345567 (1967-10-01), Turner et al.
patent: 3794912 (1974-02-01), Severin et al.
Karlsen Ernest F.
MSI Electronics Inc.
Rolinec Rudolph V.
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