The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 17, 2011
Filed:
May. 30, 2008
Christian Ohly, Weil der Stadt, DE;
Walter Strassner, Schorndorf, DE;
Joachim Graeber, Heilbronn, DE;
Ulrich Eisele, Stuttgart, DE;
Lothar Diehl, Gerlingen, DE;
Thomas Seiler, Stuttgart, DE;
Christian Ohly, Weil der Stadt, DE;
Walter Strassner, Schorndorf, DE;
Joachim Graeber, Heilbronn, DE;
Ulrich Eisele, Stuttgart, DE;
Lothar Diehl, Gerlingen, DE;
Thomas Seiler, Stuttgart, DE;
Robert Bosch GmbH, Stuttgart, DE;
Abstract
A sensor element is provided for determining a physical property of a measuring gas, especially of the concentration of at least one gas component in the measuring gas, which has at least one ceramic layer, a diffusion barrier adjoining the at least one ceramic layer and at least one electrode that is exposed to the measuring gas diffusing through the diffusion barrier. In order to reduce the production variations with respect to the static pressure dependence and the limiting current of the diffusion barrier), the proportions of silicon in the diffusion barrier and in the at least one ceramic layer are approximately equal and differ by not more than 1 wt. %.