Electric heating – Metal heating – By arc
Patent
1983-02-03
1985-04-16
Albritton, C. L.
Electric heating
Metal heating
By arc
219121LW, B23K 2700
Patent
active
045117837
ABSTRACT:
A method for making electrical contacts to diamond, in which a surface layer of the diamond is transformed by means of a laser beam into graphite having a sheet resistivity in the range of 5 to 100 Ohms. The diamond to be treated and the laser beam are moved with respect to each other according to a raster pattern. The laser is operated with such a pulse width and pulse frequency, the laser beam is focussed in such a way and is moved with respect to the diamond at such a speed, that pit-like surface areas of graphite are formed which join or overlap. After the graphitization a wire or other electrical conductor is fixed to the graphite layer, through which a diamond having electrical contacts is obtained.
REFERENCES:
patent: 4420675 (1983-12-01), Takehara
"The Properties of Diamond", ed., J. E. Field, Academic Press 1979, p. 644.
"Dosimetry with a Diamond Operating as a Resistor";, E. A. Burgemeister, 2362 Physics in Medicine and Biology, vol. 26, Mar. 1981, No. 2, pp. 269-275.
"Preparation and Characteristics of Natural Diamond Nuclear Radiation Detectors", S. F. Koxlov, IEEE Transactions on Nucleur Science, Vd. NS-22, Feb. 1975, No. 1, pp. 160-170.
Albritton C. L.
N.V. Optische Industrie "De Oude Delft"
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