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US 6,645,360 B1Granted
Planar sensor element for a gas sensor
AssigneeRobert Bosch GmbH
InventorsUlrich Eisele, Lothar Diehl
Life of this patent
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Abstract
A sensor element, having a ceramic body made of a laminate having at least one ceramic foil and having a heating element embedded in the ceramic body. At least the longitudinal edges of the ceramic body have a chamfer. The heat source formed by the heating element lies in the direction of the bisector of an angle which is enclosed by a chamfer's edge lying closest to the heating element. The chamfer is formed in such a way that the angle enclosed by the large surface side edge, is larger than an angle enclosed by a narrow side edge.
Claims1
A sensor element, comprising:
- a ceramic body made of a laminate of at least one ceramic foil;
- and
- a heating element embedded in the ceramic body, wherein:
- at least longitudinal edges of the ceramic body include a chamfer in a vicinity of the heating element, the chamfer includes at least one large surface side edge and at least one narrow side edge, the chamfer is formed as a multiple chamfer including a plurality of chamfer sections, and
- an enclosed angle at the at least one large surface side edge is greater than the enclosed angle at the at least one narrow side edge.
2 more elements
Dependencies are inferred from the claim text.