Method of manufacturing a platinum tip

Details Method of manufacturing a platinum tip Method of manufacturing a platinum tip

1989-03-23

1991-07-30

Valentine, Donald R.

Chemistry: electrical and wave energy

Processes and products

Electrostatic field or electrical discharge

20412955, 20412995, 156664, 51285R, C25F 316

Patent

active

050357808

ABSTRACT:
In the production of a tunneling probe tip having a sharp point by utilizing electropolishing, the present invention has enabled the production of a platinum tunneling probe tip always produceable in an identical conical form having high point sharpness without scattering in the shape caused by the anisotropy of crystal face with respect to the rate of polishing during polishing of a platinum material through adoption of a two-stage polishing process, which comprises subjecting a platinum tunneling probe tip material to a primary polishing for primary shaping of the tunneling probe tip material into a tunneling probe tip form, and then subjecting the shaped material to a secondary polishing for sharpening of the point with a mixed acid comprising sulfuric acid, nitric acid, and phosphoric acid.

REFERENCES:
patent: 2430028 (1947-11-01), Pfann et al.
patent: 2476965 (1949-07-01), Emerson et al.
patent: 4181882 (1980-01-01), Isaacs
patent: 4495039 (1985-01-01), Cerise et al.

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