Resistance probe for determining gas compositions and method of producing it

A resistance probe to determine the oxygen content in gas mixtures, the resistance probe including a sensor carrier body comprising the following superposed layers:

• an insulating ceramic substrate;
• a pair of electrodes;
• a semiconductor layer, which is capable of functioning as a gas sensor, and which is in electrical contact with said pair of electrodes;
• and
• a ceramic covering disposed on said semiconductor layer and configured as a protective layer structure produced by thick-film technology and in the form of a pattern of regions which cover the semiconductor layer and of openings which allow access for a gas mixture to the semiconductor layer.

A resistance probe for determining the oxygen content in gas mixtures, said resistance probe comprising:

• a layered sensor carrier body including superposed layers of an insulating ceramic substrate, a pair of laterally spaced electrodes, and at least one covering layer which is provided with at least one recess disposed above said pair of laterally spaced electrodes;
• a semiconductor layer disposed within said at least one recess and electrically contacting said pair of laterally spaced electrodes;
• and
• a ceramic cover having at least one opening and covering the semiconductor layer on the side of the semiconductor layer which is exposed a gas mixture.