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Preparation of High-accuracy NTC Thermistor Chip
2022/10/06 03:10:29

NTC thermistor chip is widely used in optical communications, IGBT, smart wear, medical equipment and other fields due to their high precision, great consistency, fast response and small size. In the working process of NTC thermistor chip, in order to ensure the accuracy of temperature monitoring, temperature control and temperature protection, the accuracy requirements are very strict. How to improve the dicing quality and accuracy of thermistor chip under the condition of cost control, so as to improve the yield rate? EXSENSE Electronics recommend a high-accuracy NTC thermistor chip, which reduces the amount of electrode material while ensuring the high accuracy of the thermistor chip, which not only improves the rate of finished products but also reduces the production cost.

This NTC thermistor chip consists of ceramic sintered body and a printed metal electrode layers. The ceramic sintered body is pressed and sintered by nano-powder, and rare metal oxides such as SrO, Nb2O5, AL2O5, ZnO, and Cr2O5 are added to the formula. These rare metal oxides can change the material structure of thermistor chip, and the raw materials are uniformly mixed by co-precipitation method or solid phase method, ground into nano-powder, then made into ceramic materials by spray granulation, pre-pressing, isostatic pressing molding, high-temperature sintering and other preparation steps. After slicing, the metal electrode layer is printed on the upper and lower surfaces of the ceramic sintered body by silk screen printing method or vacuum sputtering method, and the structure between the ceramic sintered body and the metal electrode layers is fixed by sintering. Then, the NTC thermistor chips with high accuracy are obtained by using a dicing machine.

DT series high-accuracy NTC thermistor chip developed and produced by EXSENSE Electronics Technology Co., Ltd., which accuracy can up to ±0.5%, it is the preferred temperature control component for application scenarios with high temperature measurement environment requirements (such as medical sensor, smart home, optical transceiver, new energy, etc.).

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