Fingerprinting crystals

Details Fingerprinting crystals Fingerprinting crystals

1977-06-22

1979-03-13

Ciarlante, Anthony V.

Measuring and testing

Surface and cutting edge testing

G01N 1908

Patent

active

041435443

ABSTRACT:
A diamond or cubic boron nitride crystal containing growth discontinuities resulting from changes in the environment of the growing crystal and having at least one smooth outside surface which intersects the growth discontinuities is charged electrostatically, a fine powder is applied to the charged smooth surface and the applied powder produces a pattern on the charged surface which is a delineation of the intersected growth discontinuities.

REFERENCES:
patent: 2678420 (1954-05-01), De Forest et al.
patent: 3162040 (1964-12-01), Cahen

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