Method for manufacturing negative temperature coefficient (NTC) thermosensitive chip for high-precision temperature sensor

A technology of temperature sensor and manufacturing method, which is applied to thermometers, thermometers and instruments using electric/magnetic elements directly sensitive to heat, and can solve problems such as aging, electrical performance drift, and poor stability between semiconductor ceramics and metal electrodes
CN101995306AActive Publication Date: 2011-03-30ZHUHAI EXENSE MEDICAL TECH
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
ZHUHAI EXENSE MEDICAL TECH
Publication Date
2011-03-30

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Abstract

The invention belongs to the technical field of electronic parts and components, in particular to a method for manufacturing a negative temperature coefficient (NTC) thermosensitive chip for a high-precision temperature sensor, comprising the following steps: (1) preparing NTC thermosensitive semiconductor ceramic powder; (2) forming / sintering into a strip shape; (3) encapsulating by utilizing glass; (4) testing the resistivity; (5) cutting based on the size; and (6) adding terminal electrodes. As for the NTC thermosensitive chip manufactured by the method in the invention, in high-precision temperature measuring application occasions, the precision of the resistance R and the precision of the material constant B are controlled within 0.3%, namely the temperature precision can be controlled at 0.1% DEG C, and the annual drift rate of electric properties ( the resistance R and the material constant B) is less than 0.1% after the chip is utilized in an application circuit, thus the NTC thermosensitive chip can preferably ensure that high-precision resistance adjustments is realized, and has good stability preferably.
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Description

technical field

[0001] The invention belongs to the technical field of electronic components. Specifically disclosed is a method for manufacturing an NTC thermal chip for a high-precision temperature sensor. Background technique

[0002] Thermistors and temperature sensors composed of NTC thermal chips as the core and in different packages are widely used in various temperature detection, temperature compensation, and temperature control circuits. The central role of signaling.

[0003] With the development of electronic technology, various electronics are further multi-functional and intelligent, and the application of NTC thermal chips in various occasions that need to detect, control, and compensate temperature is increasing. At the same time, due to the need for high-precision temperature detection and temperature control of electronic equipment, higher and higher requirements are put forward for the accuracy and stability of the R resistance value and B value (materia...

Claims

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