Method for making a stylus having a conductive carbon layer and

Details Method for making a stylus having a conductive carbon layer and Method for making a stylus having a conductive carbon layer and

1981-12-01

1983-12-13

Albritton, C. L.

Electric heating

Metal heating

By arc

219121LJ, 219121LP, 219121LZ, B23K 2700

Patent

active

044206755

ABSTRACT:
A diamond body is irradiated with a pulsed laser beam in an environment containing a small amount of oxygen to convert the carbon atoms of the diamond into a conductive layer which serves as a stylus electrode. The conversion process may be preceded by a process in which the diamond body is placed in an environment containing a large amount of oxygen and irradiated with the laser beam to carbonate the irradiated area to form a groove so that the electrode can be formed on the bottom of the groove. This prevents the electrode from being damaged when the stylus pitches as it moves on the record surface.

REFERENCES:
patent: 3527198 (1970-09-01), Takaoka
patent: 4097636 (1978-06-01), Hawrylo et al.
patent: 4120742 (1978-10-01), Asano et al.
patent: 4172219 (1979-10-01), Deml et al.
patent: 4212471 (1980-07-01), Nishiwaki et al.
patent: 4272775 (1981-06-01), Compton et al.
patent: 4286250 (1981-08-01), Sacchetti

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