Thermistor device
First Claim
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1. A thermistor device comprising:
- a thermistor body having a front surface and a back surface;
first electrodes made from a conductive material not containing silver and located in physical contact with peripheral portions of the front and back surfaces, respectively, of said thermistor body; and
second electrodes made from a conductive material including silver and located in physical contact with at least central portions of the front and back surfaces, respectively, of said thermistor body, wherein said second electrodes are not in physical contact with said first electrodes whereby a gap exists between said first and second electrodes;
wherein said first electrodes prevent migration of silver from extending beyond said gap between said first and second electrodes.
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Abstract
A thermistor device manufactured at low cost in which atoms of Ag do not migrate substantially into the thermistor body. The device comprises a disk-like thermistor body and annular first electrodes formed in peripheral portions of the front and back surfaces, respectively, of the thermistor body. The first electrodes are made from a conductive material not containing silver. Second electrodes are formed in central portions of the front and back surfaces, respectively, of the thermistor body. The second electrodes are in ohmic contact with the thermistor body, and are made from a conductive material made mostly of silver.
24 Citations
13 Claims
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1. A thermistor device comprising:
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a thermistor body having a front surface and a back surface;
first electrodes made from a conductive material not containing silver and located in physical contact with peripheral portions of the front and back surfaces, respectively, of said thermistor body; and
second electrodes made from a conductive material including silver and located in physical contact with at least central portions of the front and back surfaces, respectively, of said thermistor body, wherein said second electrodes are not in physical contact with said first electrodes whereby a gap exists between said first and second electrodes;
wherein said first electrodes prevent migration of silver from extending beyond said gap between said first and second electrodes. - View Dependent Claims (2, 3, 4)
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5. A thermistor device comprising:
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a thermistor body having a front surface and a back surface;
first electrodes made from a conductive material not containing silver and located in physical contact with first portions of the front and back surfaces, respectively, of said thermistor body; and
second electrodes made from a conductive material including silver and located in physical contact with at least second portions, which are different than said first portions, of the front and back surfaces, respectively, of said thermistor body, wherein said second electrodes are not in physical contact with said first electrodes and a gap is formed between said first and said second electrodes;
wherein said first electrodes prevent migration of silver from extending beyond said gap between said first and second electrodes. - View Dependent Claims (6, 7, 8, 9)
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10. A thermistor device, comprising:
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a thermistor body having a front surface and a back surface;
first electrodes made from a conductive material consisting essentially of material which does not generate inter-electrode migration and located in physical contact with peripheral portions of the front and back surfaces, respectively, of said thermistor body; and
second electrodes made from a conductive material consisting essentially of a material which generates inter-electrode migration and located in physical contact with at least central portions of the front and back surfaces, respectively, of said thermistor body, wherein said second electrodes are not in physical contact with said first electrodes whereby a gap exists between said first and second electrodes.
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11. A thermistor device, comprising:
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a thermistor body having a front surface and a back surface;
first electrodes node from a conductive material consisting essentially of material which does not generate inter-electrode migration and located in physical contact with peripheral portions of the front and back surfaces, respectively, of said thermistor body; and
second electrodes made from a conductive material consisting essentially of a material which generates inter-electrode migration and located in physical contact with at least central portions of the front and back surfaces, respectively, of said thermistor body, wherein said second electrodes are consistently thicker and of a greater surface area than said first electrodes to provide a consistently planar surface over all of an outermost surface of said second electrodes on the front and back surfaces of the thermistor body, and wherein said second electrodes are not in physical contact with said first electrodes whereby a gap exists between said first and second electrodes. - View Dependent Claims (12, 13)
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Specification