Patent ID: 7799192
Filing Date: 2010-09-21
Classification: G01N

Abstract:
1. A sensor element for detecting a physical property of a measured gas, comprising: a first solid electrolyte film; a second solid electrolyte film; a diffusion barrier disposed in a layer plane between the first solid electrolyte film and the second solid electrolyte film; a gas-impermeable cover layer provided at least locally on the diffusion barrier so that in the regions in which the gas-impermeable cover layer is provided on the diffusion barrier, diffusion of the measured gas one of (a) into and (b) out of the diffusion barrier is substantially prevented; and a gas entry opening through the first solid electrolyte film provided to facilitate travel of the measured gas through the gas entry opening and the diffusion barrier to an internal electrode, wherein the gas-impermeable cover layer is provided on a side of the diffusion barrier facing toward the gas entry opening.