Method and apparatus for measuring electrical conductivity

Details Method and apparatus for measuring electrical conductivity Method and apparatus for measuring electrical conductivity

1974-05-30

1976-04-27

Rolinec, R. V.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

With rotor

324 58C, G01R 3126, G01R 2702

Patent

active

039537960

ABSTRACT:
Method and apparatus for measuring the conductivity of material such as semiconductor discs which are coupled capacitively to a high frequency resonant circuit so as to dampen the circuit. The resonant circuit is designed as a tank circuit of high quality and has an inner conductor and a coaxial outer conductor. An opening is formed in the resonant cavity at the capacitive end and the semiconductor material covers the opening and is capacitively coupled to the cavity. Energy is coupled into the cavity from a driving oscillator and energy is coupled out of the cavity and is detected and indicated on a suitable indicating device. The resistivity of the semiconductor disc can be determined from the input and output energy.

REFERENCES:
patent: 2859407 (1958-11-01), Henisch
patent: 3234461 (1966-02-01), Trent et al.
patent: 3315156 (1967-04-01), Keller
patent: 3452279 (1969-06-01), DiPiazza
patent: 3805160 (1974-04-01), Philbrick et al.
Nalivaiko et al.; "Resonator Method . . . "; Elektron Tekh. 12 (USSR); No. 4 (10); 1971.

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