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A sensor element for detecting a physical property of a gas includes: a solid electrolyte film; a first end area and a second end area situated diametrically opposite in the longitudinal direction; a functional element in the first end area in the interior which is electrically conductively connecte

A sensor element for detecting a physical property of a gas includes: a solid electrolyte film; a first end area and a second end area situated diametrically opposite in the longitudinal direction; a functional element in the first end area in the interior which is electrically conductively connected to a contact surface situated in the second end area on the outer surface, the electrically conductive connection having a strip conductor running essentially in the longitudinal direction in the interior of the sensor element; and a reference gas channel running essentially in the longitudinal direction of the sensor element communicating with a reference gas outside of the sensor element via a reference gas opening, the strip conductor and the reference gas channel being situated in such a way that at least a partial overlap occurs between them.

대표청구항 ▼

1. A sensor element for detecting a physical property of a gas, comprising: a first end area and a second end area situated diametrically opposite in the longitudinal direction of the sensor element;a functional element in the first end area in the interior of the sensor element which is electricall

1. A sensor element for detecting a physical property of a gas, comprising: a first end area and a second end area situated diametrically opposite in the longitudinal direction of the sensor element;a functional element in the first end area in the interior of the sensor element which is electrically conductively connected to a contact surface situated in the second end area on the outer surface of the sensor element, the electrically conductive connection between the functional element and the contact surface having a strip conductor running essentially in the longitudinal direction in the interior of the sensor element;a reference gas channel running essentially in the longitudinal direction of the sensor element and communicating with a reference gas outside of the sensor element via a reference gas opening;wherein the strip conductor and the reference gas channel are situated in such a way that at least a partial overlap occurs between the strip conductor and the reference gas channel when viewed in a top view of the sensor element, and wherein the strip conductor, at an end of the strip conductor that is opposite in the longitudinal direction to the first end area of the sensor element, runs at an angle of more than 0° relative to the outside of the sensor element and not more than 25° relative to the outer side of the sensor element. 2. The sensor element as recited in claim 1, wherein the electrically conductive connection between the functional element and the contact surface has a feedthrough which runs essentially perpendicularly to the longitudinal direction of the sensor element, the feedthrough including a conductive coating of the radial wall of a via hole of the sensor element, and the reference gas channel being situated without overlap with the feedthrough when viewed in the top view of the sensor element. 3. The sensor element as recited in claim 2, wherein the functional element is a two-dimensionally configured cermet electrode which communicates with the exterior space of the sensor element via the reference gas channel. 4. The sensor element as recited in claim 2, wherein the reference gas channel is provided unfilled. 5. The sensor element as recited in claim 2, wherein the functional element is an electric resistance heater which has an electrical resistance of a maximum of 30 Ohms at 20° C. 6. A sensor element for detecting a physical property of a gas, comprising: a first end area and a second end area situated diametrically opposite in the longitudinal direction of the sensor element;a functional element in the first end area in the interior of the sensor element which is electrically conductively connected to a contact surface situated in the second end area on the outer surface of the sensor element, the electrically conductive connection between the functional element and the contact surface having a strip conductor running essentially in the longitudinal direction in the interior of the sensor element; anda reference gas channel running essentially in the longitudinal direction of the sensor element and communicating with a reference gas outside of the sensor element via a reference gas opening;wherein the strip conductor and the reference gas channel are situated in such a way that at least a partial overlap occurs between the strip conductor and the reference gas channel when viewed in a top view of the sensor element, and wherein the strip conductor, at the end facing away from the first end area of the sensor element, runs at an angle of not more than 25° relative to the outer side of the sensor element;wherein the electrically conductive connection between the functional element and the contact surface has a feedthrough which runs essentially perpendicularly to the longitudinal direction of the sensor element, the feedthrough including a conductive coating of the radial wall of a via hole of the sensor element, and the reference gas channel being situated without overlap with the feedthrough when viewed in the top view of the sensor element;wherein the functional element is an electric resistance heater which has an electrical resistance of a maximum of 30 Ohms at 20° C.; andwherein the resistance heater is electrically conductively connected to two contact surfaces situated in the second end area on the outer surface of the sensor element, the two electrically conductive connections between the resistance heater and the contact surfaces each having a strip conductor running essentially in the longitudinal direction in the interior of the sensor element, the strip conductors and the reference gas channel being situated in such a way that in a top view of the sensor element, at least a partial overlap occurs respectively between at least one of the strip conductors and the reference gas channel, and, at the ends of the strip conductors facing away from the first end area of the sensor element, the strip conductors run at an angle of not more than 25° relative to the outer side of sensor element. 7. The sensor element as recited in claim 6, wherein the electrically conductive connections between the resistance heater and the contact surfaces each have a feedthrough which runs essentially perpendicularly to the longitudinal direction of the sensor element, the feedthroughs each including a conductive coating of the radial wall of a via hole of the sensor element, and the reference gas channel being situated without overlap with at least one of the feedthroughs when viewed in the top view of the sensor element. 8. A sensor element for detecting a physical property of a gas, comprising: a first end area and a second end area situated diametrically opposite in the longitudinal direction of the sensor element;a functional element in the first end area in the interior of the sensor element which is electrically conductively connected to a contact surface situated in the second end area on the outer surface of the sensor element, the electrically conductive connection between the functional element and the contact surface having a strip conductor running essentially in the longitudinal direction in the interior of the sensor element;a reference gas channel running essentially in the longitudinal direction of the sensor element and communicating with a reference gas outside of the sensor element via a reference gas opening;wherein the strip conductor and the reference gas channel are situated in such a way that at least a partial overlap occurs between the strip conductor and the reference gas channel when viewed in a top view of the sensor element, and wherein the strip conductor, at the end facing away from the first end area of the sensor element, runs at an angle of not more than 25° relative to the outer side of the sensor element;wherein the electrically conductive connection between the functional element and the contact surface has a feedthrough which runs essentially perpendicularly to the longitudinal direction of the sensor element, the feedthrough including a conductive coating of the radial wall of a via hole of the sensor element, and the reference gas channel being situated without overlap with the feedthrough when viewed in the top view of the sensor element;wherein the functional element is a two-dimensionally configured cermet electrode which communicates with the exterior space of the sensor element via the reference gas channel;wherein an overlap occurs which extends locally in the transverse direction of the sensor element across not less than 5% of at least one of the local width of the reference gas channel and the local width of the strip conductor. 9. A sensor element for detecting a physical property of a gas, comprising: a first end area and a second end area situated diametrically opposite in the longitudinal direction of the sensor element;a functional element in the first end area in the interior of the sensor element which is electrically conductively connected to a contact surface situated in the second end area on the outer surface of the sensor element, the electrically conductive connection between the functional element and the contact surface having a strip conductor running essentially in the longitudinal direction in the interior of the sensor element;a reference gas channel running essentially in the longitudinal direction of the sensor element and communicating with a reference gas outside of the sensor element via a reference gas opening;wherein the strip conductor and the reference gas channel are situated in such a way that at least a partial overlap occurs between the strip conductor and the reference gas channel when viewed in a top view of the sensor element, and wherein the strip conductor, at the end facing away from the first end area of the sensor element, runs at an angle of not more than 25° relative to the outer side of the sensor element;wherein the electrically conductive connection between the functional element and the contact surface has a feedthrough which runs essentially perpendicularly to the longitudinal direction of the sensor element, the feedthrough including a conductive coating of the radial wall of a via hole of the sensor element, and the reference gas channel being situated without overlap with the feedthrough when viewed in the top view of the sensor element;wherein the functional element is a two-dimensionally configured cermet electrode which communicates with the exterior space of the sensor element via the reference gas channel;wherein an overlap occurs which extends locally in the transverse direction of the sensor element across 100% of at least one of the local width of the reference gas channel and the local width of the strip conductor. 10. A sensor element for detecting a physical property of a gas, comprising: a first end area and a second end area situated diametrically opposite in the longitudinal direction of the sensor element;a functional element in the first end area in the interior of the sensor element which is electrically conductively connected to a contact surface situated in the second end area on the outer surface of the sensor element, the electrically conductive connection between the functional element and the contact surface having a strip conductor running essentially in the longitudinal direction in the interior of the sensor element;a reference gas channel running essentially in the longitudinal direction of the sensor element and communicating with a reference gas outside of the sensor element via a reference gas opening;wherein the strip conductor and the reference gas channel are situated in such a way that at least a partial overlap occurs between the strip conductor and the reference gas channel when viewed in a top view of the sensor element, and wherein the strip conductor, at the end facing away from the first end area of the sensor element, runs at an angle of not more than 25° relative to the outer side of the sensor element;wherein the electrically conductive connection between the functional element and the contact surface has a feedthrough which runs essentially perpendicularly to the longitudinal direction of the sensor element, the feedthrough including a conductive coating of the radial wall of a via hole of the sensor element, and the reference gas channel being situated without overlap with the feedthrough when viewed in the top view of the sensor element;wherein the strip conductor has a selected width in at least one of (i) the area in which the strip conductor runs at an angle, and (ii) the area in which the strip conductor intersects with an edge of the reference gas channel when viewed in a top view of the sensor element, wherein the selected width is greater than a width of an area of the strip conductor facing the exhaust gas by at least 25%.