Electrochemical process makes fine tungsten needles for use as microscopic probes or field-emission cathodes. Etching vessel filled with dense, inert lower liquid covered by less-dense, caustic etching solution. Newly formed needle breaks off upper part of wire in etchant and falls into can in inert liquid below. Improved process does not require close monitoring and left unattended for an indefinite time.
Electrochemical Process Makes Fine Needles
NASA Tech Briefs ; 10 , 3
01.05.1986
Sonstige
Keine Angabe
Englisch
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