Sensor element

US7972489B2 · kind B2 · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Roland Stahl · Freiberg, DE
• Hans-Martin Wiedenmann · Stuttgart, DE
• Berndt Cramer · Leonberg, DE
• Detlef Heimann · Gerlingen, DE
• Thomas Wahl · Pforzheim, DE
• Lothar Diehl · Stuttgart, DE
• Thomas Moser · Schwieberdingen, DE
• Bjoern Janetzky · Ditzingen, DE
• Jan Bahlo · Pforzheim, DE

Key dates

• Filing date: Sep 22, 2004
• Grant date: Jul 5, 2011
• Expiry date: Sep 21, 2029

Classification

• Technology area (CPC G): Physics
• CPC primary: G01K2205/04
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A sensor element is used to detect a physical property of a measuring gas, preferably to determine the oxygen content or the temperature of an exhaust gas of an internal combustion engine. The sensor element contains a first solid electrolyte layer and a second solid electrolyte layer. A first printed conductor and a second printed conductor are provided on opposite sides of the first solid electrolyte layer, the first printed conductor including a first electrode and a feed line to the first electrode, and the second printed conductor including a second electrode and a feed line to the second electrode. A third printed conductor, which includes a third electrode and a feed line to the third electrode, is provided on the second solid electrolyte layer. The second printed conductor is positioned between the third electrode and the first printed conductor.