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A method of manufacturing a power type negative temperature coefficient thermistor

A negative temperature coefficient, thermistor technology, applied in the field of electronics, can solve the problem of large approximate resistance, and achieve the effect of reducing the approximate resistance and increasing the maximum steady-state current

Active Publication Date: 2016-07-06
SHENZHEN ZHENHUA FU ELECTRONICS
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Problems solved by technology

[0008] The purpose of the embodiment of the present invention is to provide a power-type negative temperature coefficient thermistor, aiming at solving the problem that the approximate resistance of the existing thermistor is relatively large at the maximum current

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  • A method of manufacturing a power type negative temperature coefficient thermistor
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  • A method of manufacturing a power type negative temperature coefficient thermistor

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Embodiment Construction

[0025] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0026] In the embodiment of the present invention, by deploying heat-sensitive ceramic powder, the ratio of cobalt tetroxide: manganese dioxide: nickel oxide: aluminum oxide in the heat-sensitive ceramic powder is 30-60%: 40-70%: 10-30%: 5-20% (molar ratio), thereby constituting a material with high resistivity and high B value, effectively reducing the approximate resistance at the maximum current and increasing the maximum steady-state current.

[0027] The implementation of the present invention will be described in detail below in conjunction with specific embodiments.

[0028] Such as figure...

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Abstract

The invention is suitable for the field of the electronic technology, and provides a power negative-temperature-coefficient thermistor manufacturing method. The method is mainly characterized in that temperature-sensitive ceramic powder is blended to make the molar ratio of cobaltosic oxide: manganese dioxide: nickel oxide: alumina is 30-60%:40-70%:10-30%:5-20% in order to form a high-resistivity high-B-value material, so the approximate resistance at a largest current is effectively reduced, and the largest steady-state current is improved. The addition of a vitreous body and bismuth trioxide in the temperature-sensitive ceramic powder is in favor of reducing the sintering temperature, protecting a thermistor diaphragm and reinforcing the ceramic strength.

Description

technical field [0001] The invention belongs to the technical field of electronics, and in particular relates to a manufacturing method of a power type negative temperature coefficient thermistor. Background technique [0002] With the continuous development of communications, computers and their peripheral products and household appliances in the direction of chip, miniaturization and digitalization, the requirements for chip and miniaturization of components are becoming more and more urgent. In recent years, surface mount technology (SMT) has risen rapidly, traditional plug-in circuits are gradually replaced by SMT circuits, and most electronic components with leads have been chipped. [0003] In the power supply part of the electronic circuit (LED driver board, fluorescent lamp inverter, heater, etc.), a surge current that is hundreds of times higher than the normal operating current will be generated at the moment of power-on. The power type negative temperature coeffi...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01C7/04
Inventor 李耀坤徐鹏飞李建辉朱建华刘季超李晶曹华春
Owner SHENZHEN ZHENHUA FU ELECTRONICS
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