Rapid reaction NTC (Negative Temperature Coefficient) temperature sensor and manufacturing method thereof

Abstract

The invention belongs to the technical field of electronic components, and particularly discloses a rapid reaction NTC (Negative Temperature Coefficient) temperature sensor and a manufacturing method thereof. The NTC temperature sensor comprises a thin type ceramic substrate, NTC thermosensitive medium sizing agent layers, surface electrodes, a glass protective layer and end electrodes, wherein one surface of the ceramic substrate is coated with the NTC thermosensitive medium sizing agent layers in sequence; the surface electrodes are printed on the NTC thermosensitive medium sizing agent layers and permeate the NTC thermosensitive medium sizing agent layers through firing; the glass protective layer is printed on the surface electrodes and fixed on the surface electrodes through firing; and the end electrodes are mounted at two end parts of the ceramic substrate. The NTC temperature sensor has the advantages that the heat conduction requires short time in the temperature measuring process, the thermal time constant is small, the sensitivity is high, and the requirement for high sensitivity of temperature detection can be effectively met. The NTC temperature sensor manufacturing method is simple, and easy to realize, and can ensure meeting the requirements for small thermal time constant and high sensitivity of the NTC temperature sensor.

Description

technical field [0001] The invention belongs to the technical field of electronic components. Specifically disclosed is a fast-response NTC temperature sensor and a manufacturing method thereof. Background technique [0002] With NTC thermal chip as the core component, thermistors and temperature sensors composed of different packages are widely used in various temperature detection, temperature compensation, and temperature control circuits. The central role of the electronic signal. [0003] With the development of electronic technology, various electronic products are further multi-functional and intelligent, and NTC thermal chips are increasingly used in various occasions that require temperature detection, control, and compensation. [0004] Due to the sensitivity requirement of detecting temperature, higher and higher requirements are put forward for the response speed of NTC temperature sensor, which requires the thermal time constant of NTC temperature sensor to be...

AI Technical Summary

Problems solved by technology

The NTC temperature sensor made in this prior art has thicker chip thickness (0.3~3mm), and the thickness of the outer insulating encapsulation material (generally epoxy resin, phenolic resin, silicone resin) is also thicker and has poor thermal conductivity.

In the temperature sensing process, the heat is first transferred to the insulating encapsulation layer, and then gradually transferred to the chip. It takes a long time for the core of the chip to completely reach the external temperature. The thermal time constant is generally 5-15 seconds. This reaction speed Cannot meet the requirement of high sensitivity for temperature detection

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