Electrical connectors – Interrelated connectors relatively movable during use – Linear movement
Reexamination Certificate
1998-11-05
2001-05-15
Patel, Tulsidas (Department: 2839)
Electrical connectors
Interrelated connectors relatively movable during use
Linear movement
C204S424000
Reexamination Certificate
active
06231348
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates to an electrical contacting of a sensor element and, a method for its manufacture.
BACKGROUND INFORMATION
Planar sensor elements for determining the oxygen content in exhaust gas from internal combustion engines need a contacting at the surface to enable the sensor signal to be tapped off, and for provision with a heater voltage. Because the sensor element is used in exhaust systems of internal combustion engines, the contactings are subject to temperatures up to about 700° C. The contactings must ensure a reliable electrical and mechanical connection in this high-temperature range, and must permit simple and reliable handling during production.
International Patent Publication No. WO 95/18965, describes an electrical contacting of a sensor element of a gas sensor, in which contacts are integrally bonded by laser welding to the connection contacts of the sensor element. In so doing, the bare, metallic contact is welded onto the connection contact.
SUMMARY OF THE INVENTION
The present invention has the advantage that a reliable electrical mechanical connection is able to be produced which withstands temperature ranges of at least 700° C. The contacting is easily manipulable from a standpoint of production engineering.
Particularly easy handling of the contacts from a standpoint of production engineering is possible if the contacts are belted during the soldering or welding to the connection contacts, i.e. the individual contacts are interconnected by a metallic tape, and are separated from the metallic tape after the soldering or welding. A particularly reliable bond is produced by diffusion welding or diffusion soldering.
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Eisenschmid Heinz
Graser Theodor
Mayer Rolf
Wehrmann Johann
Hyeon Hae Moon
Kenyon & Kenyon
Patel Tulsidas
Robert & Bosch GmbH
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