A kind of thermistor with base and preparation method thereof

Abstract

The invention relates to a thermistor with a base. The thermistor with the base comprises a resistor chip, a glass head and two electrode leads. The glass head seals the resistor chip; one ends of thetwo electrode leads are respectively connected with electrodes on two ends of the resistor chip; the other ends of the two electrode leads penetrate out from the bottom part of the glass head. The thermistor with the base also comprises the base connected and fixed with the bottom part of the glass head, wherein the base is provided with two lead slots; the two electrode leads respectively penetrate through the lead slots. The invention also relates to a preparation method of the thermistor with the base. The thermistor with the base provided by the invention has the advantages of stable structure, difficulty in damage during a production and use process, reliable electric performance, high production yield, and low cost.

Description

technical field [0001] The invention belongs to the technical field of electronic components, in particular to a thermistor with a base 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. With the development of the electronic technology industry, various electronic products are further multi-functional and intelligent. The application of NTC thermistors in various occasions that require temperature detection, control, and compensation is increasing, and it is becoming more and more common and extensive. Due to the higher and higher requirements for the sensitivity of temperature detection, higher and higher requirements are put forward for the response speed and stability of the thermistor. The thermistor must be highly reliable, highly sensitive and have a long service life. [00...

AI Technical Summary

Problems solved by technology

[0006] (1) Since the glass head 12 is very dense and brittle, pulling and breaking the Dumet wire 13 during product testing, manual operation and assembly may easily cause the glass head 12 to break and be damaged, resulting in reduced product reliability and performance variation

[0007] (2) Due to easy damage in the production process, the pass rate of existing glass-encapsulated NTC thermistor products is low, and the pass rate of its resistance value within the range of ± 1% of the standard resistance value is only 50% to 60%.

[0008] (3) The part where the glass head 12 is connected to the Dumet wire 13 is easily broken by external force, and the product is easily affected by the environment during use. For example, in a humid environment, water vapor will invade the internal resistance chip 11 from the glass crack. As a result, the resistance value of the product varies. If it is used in water, the water will invade the internal resistance chip 11 from the glass crack, which will eventually lead to poor electrical performance of the product, and even cause short circuit and burnout of the product.

[0009] (4) The distance between the two Dumet wires 13 near the glass head 12 is relatively small, about 0.5mm. When the product is assembled and used, the two Dumet wires 13 are prone to short circuit, which will cause the electrical performance of the product to fail, and in severe cases, short circuit Will burn out the resistor chip 11, or even burn out the equipment

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