Power resistor and preparation method thereof
The invention relates to a power resistor and a preparation method thereof. The power resistor comprises a resistor body, which comprises a ceramic substrate, a full-coverage silver-palladium electrode layer arranged on the back face of the ceramic substrate in a full-coverage mode and a heat dissip...
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| Format: | Patent |
| Sprache: | chi ; eng |
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| Zusammenfassung: | The invention relates to a power resistor and a preparation method thereof. The power resistor comprises a resistor body, which comprises a ceramic substrate, a full-coverage silver-palladium electrode layer arranged on the back face of the ceramic substrate in a full-coverage mode and a heat dissipation plate arranged on the full-coverage silver-palladium electrode layer, wherein a nickel-plated layer and a tin-plated layer are arranged on the full-coverage silver-palladium electrode layer. During preparation, the back surface of a ceramic substrate in a resistor body is completely covered with a full-coverage silver-palladium electrode layer, a heat dissipation plate is welded on the full-coverage silver-palladium electrode layer, and a nickel layer and a tin layer are plated on the full-coverage silver-palladium electrode layer, wherein the heat dissipation plate and the full-coverage silver-palladium electrode layer are welded in a hot plate welding mode, and the temperature of a welding hot plate is 230 |
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