High-frequency detecting elements and high-frequency heater using the same
AssigneeMurata Manufacturing Co., Ltd.
InventorsHideaki Niimi, Yuichi Takaoka
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Abstract
A high-frequency detecting element that can detect a temperature increase in an instant due to high-frequency wave absorption using semiconducting ceramic with positive resistance-temperature characteristics. The ceramic is composed mainly of barium titanate. A high-frequency heater incorporating the high-frequency detecting element is also disclosed. In the high-frequency detecting element, electrodes are provided on one main surface of semiconducting ceramic 1 with positive resistance-temperature characteristics and leads 3a and 3b are soldered to the electrodes 2a and 2b.
Claims10
A high-frequency detecting element comprising:
- semiconducting ceramic with positive resistance-temperature characteristics and having a thickness between 1 mm and 4 mm;
- and
- not more than two electrodes, which are provided adjacently on said semiconducting ceramic.
A high-frequency detecting element for detecting a signal from a high frequency generating means, the high-frequency detecting element comprising:
- a semiconducting ceramic with positive resistance-temperature characteristics, said semiconducting ceramic having a high frequency receiving surface positioned relative to the high frequency generating means to receive the signal of the high frequency generating means;
- and
- two electrodes electrically bonded to an other surface of said semiconducting ceramic, said other surface not receiving the signal of the high frequency generating means;
- wherein a resistance of said semiconducting ceramic measured between the two electrodes changes in response to changes in the signal.
Dependencies are inferred from the claim text.