Solid surface contact type high-sensitivity temperature sensor and manufacture method thereof

Abstract

The invention relates to a solid surface contact type high-sensitivity temperature sensor. The solid surface contact type high-sensitivity temperature sensor comprises a top cover made of metal, a thermistor fixedly connected with the middle of the top cover, an electronic wire rod, a base and a spring connected with the top cover and the base; the thermistor includes a substrate, a chip, two leads and a chip protection layer; the two leads are fixedly connected with chip electrodes at two surfaces of the chip; the substrate is a thin film ceramic substrate; the chip is arranged on the outer surface of the substrate and directly contacts with the substrate; the chip protection layer is a glass protection layer; the chip protection layer coats the chip in a semi-enclosing manner; the substrate of the thermistor is fixedly connected with the middle of the top cover; and the two leads and the electronic wire rod are all welded to a metal sheet on the base. The temperature sensor of the invention is in surface contact with a measured solid surface, so that the temperature of the measured solid surface can be sensed, and therefore, the response speed of the temperature sensor can be greatly improved. The invention also provides a manufacture method of the above solid surface contact type high-sensitivity temperature sensor.

Description

technical field [0001] The invention belongs to the field of electronic components, in particular to a solid surface contact type high-sensitivity temperature sensor and a manufacturing method thereof. Background technique [0002] Thermistors and temperature sensors, which use thermal chips as the core components and adopt different packaging forms, are widely used in various temperature detection, temperature compensation, and temperature control circuits. The central role of electronic signaling. [0003] With the development of electronic technology, all kinds of electronics are further multi-functional and intelligent, and the application of thermal-sensitive chips in various occasions that need to detect, control, and compensate temperature is increasing. Due to the sensitivity of temperature detection and high temperature requirements, higher and higher requirements are put forward for the response speed and high temperature resistance of temperature sensors, which r...

AI Technical Summary

Problems solved by technology

The chip of the thermistor is wrapped by a glass protective layer to form a glass probe 1. Since the probe is roughly oval in shape, its contact with the measured object is only point contact, or the contact surface is very small, which causes the temperature to be directly The transmission to the probe 1 can only be transmitted through one point or to the air first and then to the probe 1, which will greatly affect the response speed of the temperature sensor

The thermal time constants of existing solid surface temperature sensors are mostly between 2-5s, and some high-end products cannot meet their requirements for response speed at all.

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