A kind of sheet type temperature sensor and its preparation method

Abstract

The invention relates to a sheet-type temperature sensor. The sheet-type temperature sensor includes a base film, a thermistor chip, a positive circuit layer, a negative circuit layer, and a capping film. The base film is provided with a chip groove, and the thermistor The chip is arranged in the chip groove, the positive electrode circuit layer and the negative electrode circuit layer are arranged on the base film without contacting each other, and are respectively connected to the positive and negative electrodes of the thermistor chip, and the capping film and The base films are attached to each other to package the thermistor chip, the positive circuit layer and the negative circuit layer. The present invention also relates to a preparation method of the above-mentioned thermistor with a base. The sheet-type temperature sensor of the present invention has the advantages of good sealing, reliable performance, high protection strength, resistance to mechanical impact, resistance to bending, not easily damaged, long service life and simple preparation.

Description

technical field [0001] The invention belongs to the technical field of electronic components, and in particular relates to a sheet-type temperature sensor and a preparation method thereof. Background technique [0002] NTC thermistor is a semiconductor resistor that is extremely sensitive to temperature. It has the advantages of high reliability, good stability, flexible use, and long service life. The sheet type NTC thermistor is especially suitable for space temperature detection in narrow areas due to its thin thickness and good elasticity, such as CPU temperature detection of computer mainframes, home appliances, and hand warmers. [0003] Such as figure 1 with figure 2 As shown, the existing film-type NTC thermistor comprises an NTC resistance chip 11, two metal leads 12 and two insulating films 13, and the two insulating films 13 are mutually pasted to make the NTC resistance chip 11 and the two metal leads 12 When packaged, one end of the two metal leads 12 is res...

AI Technical Summary

Problems solved by technology

[0005] One is poor sealing, such as image 3 As shown, due to the influence of the shape of the metal lead wire 12, the two insulating films 13 cannot be pasted completely flat and consistent, and there is a gap 130 that leads to moisture intrusion, so the performance reliability of the product is poor, and the use effect is not good.

[0006] Second, the protection strength is poor. The NTC resistance chip 11 has not been packaged and protected by any higher-strength material after welding. The strength of the insulating film 13 alone cannot withstand external mechanical impact and bending, so it is extremely easy to be damaged, resulting in product reliability. reduced, short service life

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