Method of and apparatus for producing electrically-conductive probe tips

US5145564A · kind A · utility

Assignee

• Forschungszentrum Jülich GmbH · DE

Inventors

• Heiko Lemke · Hungen, DE
• Thomas Goddenhenrich · Jülich, DE
• Hans-Peter Bochem · Jülich, DE
• Uwe Hartmann · Stuttgart, DE

Key dates

• Filing date: Mar 7, 1991
• Grant date: Sep 8, 1992
• Expiry date: Mar 7, 2011

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B82Y15/00
• WIPO field: Machine tools
• WIPO sector: Mechanical engineering

Abstract

Probe tips are produced from electrically conductive wire by electrolytic machining of a zone of the wire above a free end utilizing a liquid electrolyte layer in contact with this zone, a ring electrode surrounding this zone, and a layer of an insulating fluid into which the free end extends. The insulating fluid can be air where the electrolyte is a membrane between layers of air above and below the membrane, or a body of a liquid insulator below the electrolyte layer where the insulator and the electrolyte form a bath.