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Abstract

An electrochemical sensor has a sensor element, and is used to determine a gas concentration of a gas to be analyzed. The sensor element has a first solid electrolyte layer, an electrode that includes an electrode surface and an electrode lead, and a second solid electrolyte layer; a gas channel being introduced into the first solid electrolyte layer in such a manner, that the electrode is situated in a first, clamped region between the first and the second solid electrolyte layers, and in a second, open region between the second solid electrolyte layer and the gas compartment. In a transition region between the clamped region and the open region, the electrode borders on a layer pattern, which is constructed in such a manner, that the electrode is subjected to a lower pressure during a laminating procedure.

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