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US 2009/0212041 A1Published application
Heating Element
AssigneeEpcos AG
InventorWerner Kahr
Life of this patent
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Abstract
A heating element with a ceramic body that has PTC properties is specified. The heating element has electrodes that are arranged on ceramic body. Both the ceramic body and the electrodes are lead-free.
Claims20
A heating element comprising:
- a ceramic body that has positive temperature coefficient properties;
- and
- electrodes arranged on the ceramic body, wherein the ceramic body and the electrodes are lead-free.
A heating element comprising:
- a ceramic body having positive temperature coefficient properties, the ceramic body including a first primary surface and an opposed second primary surface, the ceramic body being lead free and comprising a material selected from the group consisting of BaTiO3 and SrTiO3;
- a first electrode disposed on the first primary surface, the first electrode being lead free;
- and
- a second electrode disposed on the second primary surface, the second electrode being lead free.
1 more element
A method of making a heating element, the method comprising:
- providing a ceramic body that has positive temperature coefficient properties, the contact body being lead free;
- forming a first electrode over a first region of the ceramic body, the first electrode being lead free;
- and
- forming a second electrode over a second region of the ceramic body, the second electrode being lead free.
1 more element
Dependencies are inferred from the claim text.