A processing technology of humidity sensor

Abstract

The invention discloses a humidity sensor processing technology which includes the steps: (1) sintering a plurality of ceramic columns into compact bodies; (2) cleaning and drying outer surfaces of aplurality of sintered ceramic columns, and performing sand blasting on the surfaces of the ceramic columns by the aid of 20-mesh corundum sand to obtain rough surfaces; (3) spraying aluminum oxide insulating coatings on the surfaces of the ceramic columns after sand blasting, and drying the insulating coatings to obtain first insulating layers; (4) printing the surfaces of the ceramic columns treated in the step (3) with electric conduction slurry mainly formed by platinum, copper and zinc to form electrode layers and the like. The processing technology is simple and scientific. According to apreparation method, hot pressing is omitted in a manufacture procedure, splintering before sintering and deforming and warping in the sintering process can be greatly decreased, resin cannot be vitrified or exceedingly expanded in the environments of high temperature of 200 DEG C or more, so that inaccurate alignment caused by deformation of a sensor is avoided, the quality of the sensor is improved, and production cost is greatly reduced.

Description

technical field [0001] The invention relates to the technical field of sensor processing, in particular to a processing technology of a humidity sensor. Background technique [0002] Sensors have already penetrated into a wide range of fields such as industrial production, space development, ocean exploration, environmental protection, resource investigation, medical diagnosis, bioengineering, and even cultural relic protection. It is no exaggeration to say that from the vast space, to the vast ocean, to various complex engineering systems, almost every modern project is inseparable from various sensors. It can be seen that the important role of sensor technology in developing economy and promoting social progress is very obvious. All countries in the world attach great importance to the development of this field. It is believed that in the near future, sensor technology will make a leap and reach a new level commensurate with its important status. [0003] The characteri...

AI Technical Summary

Problems solved by technology

[0004] Thermoplastic materials are easy to form, simple molds, low cost, recyclable, and environmentally friendly, but they are not heat-resistant, wear-resistant,

[0005] Not flame retardant; thermosetting materials are just the opposite of thermoplastic materials, difficult to form, complex molds, high cost, non-recyclable, not environmentally friendly, but high temperature resistant, wear-resistant, flame retardant, and corrosion resistant

At present, the widely used sensors need to be sealed and packaged to achieve the purpose of protection and shaping. Ordinary sensors are molded by glue filling process, or a single thermoplastic material. The glue filling process is prone to residual air bubbles and cracks. , and the cost is high, the process is complicated, and the quality is not guaranteed; while the use of a single thermoplastic material often has different defects of the material itself, there are many molds, and the cost is high

At the same time, the sensor production process needs to go through a pressure welding process, which needs to be carried out in a high temperature environment of 220 ° C. The resin frame will expand due to high temperature, resulting in inaccurate alignment and affecting the quality of the ultrasonic sensor.