Heraeus Sensor Technology Gmbh

Yageo Nexensos Gmbh

Heraeus Nexensos Gmbh

Matsvei Zinkevich

Karlheinz Wienand

Stefan Dietmann

Ralf Moos

Margit Sander

Dieter Teusch

Tim Asmus

Karl-Heinz Ullrich

Martin Turwitt

Michael Schubert

One aspect relates to a high-temperature sensor, having a coated substrate. The substrate contains a zirconium oxide or a zirconium oxide ceramic, at least one resistance structure and at least two connection contacts. The connection contacts electrically contact the resistance structure. The substrate is coated with an insulation layer. The insulation layer contains a metal oxide layer, the resistance structure and the free regions of the insulation layer, on which no resistance structure is arranged, are coated at least in regions with a ceramic intermediate layer, and a protective layer and/or a cover is arranged on the ceramic intermediate layer. At least one opening is formed in the insulation layer, which exposes at least sections of a surface of the substrate.

High-temperature chip

A method for producing a soot sensor is provided. The method includes steps of applying a contiguous metallic layer on an electrically insulating substrate and structuring the metal coating with a laser beam by vaporizing areas of the metallic layer. At least two interlaced contiguous electrically conductive structures are produced. The electrically conductive structures are spatially separated from one another with the laser beam and are electrically insulated from one another such that the conductive structures substantially extend next to one another and close to one another in an area relative to a total length thereof. A soot sensor produced using such a method is also provided. The soot sensor has an electrically insulating substrate and at least two contiguous electrically conductive structures which are spatially separated from one another and are interlaced as structured metallic layers. An intermediate space between the conductive structures is burned free with a laser.

Method for producing a soot sensor with a laser beam

A gas sensor for measuring the concentrations of gases includes a solid body electrolyte, at least three electrodes, and a closed chamber. The doped platinum includes at least 50% by weight platinum and the remainder includes at least one further element selected from the group of solid body electrolytes. In particular, the doped platinum includes between 0.5% by weight to 15% by weight ZrOand the remainder is platinum, or the pure platinum is 100% by weight platinum and the gold alloy comprises at least 50% by weight gold and maximally 50% by weight platinum. In particular, the gold alloy includes approximately 85% by weight gold and approximately 15% by weight platinum or the gold alloy comprises at least gold and platinum at a ratio of 85% gold to 15% platinum.

Gas sensor for measuring different gases, and corresponding production method

The invention relates to temperature sensors, in particular high-temperature sensors, having an optionally coated substrate, at least one resistor structure, and at least two connection contacts. The connection contacts electrically contact the resistor structure, and the substrate is made of zirconium oxide or a zirconium oxide ceramic stabilized with oxides of a trivalent metal and a pentavalent metal. The substrate is coated with an insulation layer and the resistor structure and the free regions of the insulation layer, on which no resistor structure is disposed, are at least partially coated with a ceramic intermediate layer. A protective layer and/or a cover is disposed on the ceramic intermediate layer. At least one electrode may be disposed, at least at one connection contact, alongside the resistor structure on the substrate. The invention also relates an exhaust-gas system for controlling and/or regulating an engine, particularly a motor vehicle engine, containing these temperature sensors.

High-temperature chip with high stability

A stamping die for hot stamping a material includes a profiled stamping surface, wherein the stamping die includes at least one thermally insulating substrate, on which an electrically conductive structure having a heating resistor is arranged, and wherein the electrically conductive structure is covered by an electrically insulating film. The surface of the electrically insulating film includes the profiled stamping surface and the electrically insulating film covers at least the heating resistor such that the electrically insulating film with the stamping surface can be electrically heated by the heating resistor. A method for hot stamping a material using such a stamping die includes heating the resistor to a temperature between 100&#xb0; C. and 800&#xb0; C.

Microstructured hot stamping die

A resistance thermometer is provided having a measuring resistor in a form of a 0.1 to 10 &#x3bc;m thick structured platinum layer applied to an electrically insulated surface of a substrate and an electrically insulating coating layer covering the platinum layer. The substrate or its surface contains zirconium dioxide, which is stabilized with oxides of a trivalent and a pentavalent metal. Preferably, the trivalent metal is yttrium and the pentavalent metal is tantalum or niobium. The characteristic curve of the measuring resistor preferably conforms to DIN-IEC 751. For mass production of resistance thermometers having high and reproducible measurement accuracy, a structured platinum layer having a thickness of 0.1 to 10 &#x3bc;m is applied to an electrically insulating substrate having a thermal expansion coefficient in the range of 8.5 to 10.5&#xd7;10/&#xb0; K and a roughness less than 1 &#x3bc;m, and the structured platinum layer is covered by an electrical insulator. The resistance thermometers allow precise temperature measurement between &#x2212;200&#xb0; C. and +850&#xb0; C., preferably as a sensor in an exhaust gas treatment system. In a substance-sensitive sensor having a circuit path structure on a substrate, the circuit path structure has an epitaxially applied base layer, and a substance-sensitive metal layer attached to the epitaxially applied base layer.

Non-conducting zirconium dioxide

A coated wire is solderable with soft solder while maintaining separate phases of the core and the coating. A 100 &#x3bc;m to 400 &#x3bc;m thick nickel wire may be coated galvanically with silver. For a film resistor with coated wires as connection wires, including a platinum measurement resistor on an electrically insulating substrate and connection wires connected to the measurement resistor, the connection wires have a coated nickel core. The coating may be made of silver or glass or ceramic or a mixture of these materials, or on its outside may be made of glass or ceramic or a mixture of these materials. For producing film resistors a thin metal or glass component is deposited on a connection wire connected to a track conductor arranged on an electrically insulating substrate, and a thick glass paste is deposited and fired on this metal or glass component. For mass production of film, several film resistors encased together in glass may be partitioned by fracturing.

Growing community of inventors

Goldbach, Germany

Matsvei Zinkevich