Method of making a vibration-resistant electrical component and connection lead combination, particularly exhaust gas composition sensor

US4524038A · kind A · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Wolfgang Heinemann · Remscheid, DE
• Rainer Noack · Bietigheim, DE
• Helmut Weyl

Key dates

• Filing date: Sep 27, 1982
• Grant date: Jun 18, 1985
• Expiry date: Sep 27, 2002

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T29/49172
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

To manufacture a vibration-resistant, shock-resistant electrical connection on a ceramic substrate (11) having an electrically conductive layer (12) applied to a surface (13, 19) thereof, a groove or channel-like depression (16, 20) is formed in the surface, preferably also including a through-bore (18), into which a conductor (17) is placed. The space between the conductor and the groove, the through-bore, if provided, and an extending groove at the other surface (19) of the substrate is filled with a sinterable mass (21), preferably a cermet, containing a metal which is compatible with the metal of the conductor wire (17), both for example containing platinum. As a starting material, the plate with the grooves therein is extrusion-pressed, pre-sintered at a low temperature to give it form stability, then the electrode (12) is applied, then the electrical conductor (17) and the cermet is applied and then the entire sub-assembly is fired to sintering temperature, e.g. about 1500.degree. C.; if desired, a further protective coating (22) of magnesium spinel may be plasma-sprayed on. Due to shrinkage of the ceramic components, the wire (17) will be securely held in position in the gro…