Polymer resistance type humidity-sensitive element and preparation method thereof

A technology of humidity sensor and resistance type, which is applied in the field of polymer resistance type humidity sensor and its preparation, can solve the problems of low humidity and high resistance, achieve fast response speed, improve deliquescence resistance, and reduce resistance

Inactive Publication Date: 2021-04-06
WUXI HAOBANG HIGH TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to overcome the above-mentioned deficiencies, and provide a polymer resistive humidity sensor with high sensitivity, good linearity, fast response speed and high reliability that improves the problems of high resistance in low humidity and easy deliquescence in high humidity. and its preparation method

Method used

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  • Polymer resistance type humidity-sensitive element and preparation method thereof
  • Polymer resistance type humidity-sensitive element and preparation method thereof
  • Polymer resistance type humidity-sensitive element and preparation method thereof

Examples

Experimental program
Comparison scheme
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preparation example Construction

[0046] The preparation method of the polymer resistance type humidity sensor includes two parts: the preparation of the interdigital electrodes and the preparation of the moisture-sensitive film.

[0047] Among them, the preparation process of the interdigitated electrode is as follows:

[0048] The first step: using screen printing technology to prepare interdigitated electrodes, according to the mass ratio of ink: copper powder (8-10): 1, the ink is prepared into a paste; as a preference, ink: copper powder Mass ratio 9:1;

[0049] Step 2: Then inject the paste onto the No. 1 screen plate with part of the interdigitated electrode pattern, the pattern of the No. 1 screen plate corresponds to the printed lateral electrode, at an inclination angle of 35-45° and Scrape the paste under Newtonian pressure, make horizontal electrodes and dry them;

[0050] Step 3: Align the electrodes printed and dried in the second step with the No. 2 screen plate with a part of the interdigitat...

Embodiment 1

[0069] Embodiment 1: The preparation process of the interdigitated electrode of the polymer resistance type humidity sensor is as follows:

[0070] The first step: use screen printing technology to prepare interdigitated electrodes, according to the mass ratio of ink:copper powder is 8:1, the ink is prepared into a paste;

[0071] Step 2: Then inject the paste onto the No. 1 screen plate with part of the interdigitated electrode pattern, the pattern of the No. 1 screen plate corresponds to the printed lateral electrode, at an inclination angle of 35-45° and Scrape the paste under Newtonian pressure, make horizontal electrodes and dry them;

[0072] Step 3: Align the electrodes printed and dried in the second step with the No. 2 screen plate with a part of the interdigitated electrode pattern. The pattern of the No. 2 screen plate corresponds to the printed longitudinal electrode. Under the same conditions Scratch the paste, print the longitudinal electrodes and dry them;

[...

Embodiment 2

[0080] Example 2: The preparation process of the interdigitated electrode of the polymer resistance type humidity sensitive element is the same as that of Example 1, except that the mass ratio of ink: copper powder in the first step is adjusted to 9:1. The preparation process is also consistent with Example 1.

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Abstract

The invention relates to a macromolecule resistance type humidity-sensitive element. The element is characterized by comprising a packaging shell, a base body, a humidity-sensitive film, an interdigital electrode and pins, wherein the base body is a humidity-sensitive sensing base body, and the humidity-sensitive film is arranged on the surface of the interdigital electrode and the surface of the base body; the interdigital electrode comprises a transverse electrode and a longitudinal electrode. The organic polymer material is compounded by adopting a multi-layer brush coating technology, resistance of the polymer resistance type humidity sensor in a low-humidity environment is remarkably reduced, sensitive detection on the low-humidity environment is realized, deliquescence resistance of the film is improved by doping cellulose, in addition, precision of silk-screen printing based on a single screen printing plate is relatively low, and cost is relatively low. The element is advantaged in that the pattern of the interdigital electrode is split into the transverse electrode part and the longitudinal electrode part, the preparation precision of the interdigital electrode is improved through the multi-screen separate silk-screen printing technology, the adhesion between the electrode and the substrate is enhanced through copper doping of the conductive ink, and the humidity-sensitive characteristics of high sensitivity, good linearity, high response speed and high reliability are obtained.

Description

technical field [0001] The invention relates to a polymer resistance type humidity sensitive element and a preparation method thereof. Background technique [0002] Humidity sensor, as an important information acquisition component for hygrometer moisture detection, is widely used in industrial production and daily life. Based on the humidity-sensing materials, humidity sensors can be divided into two types: organic polymer type and semiconductor ceramic type. Among them, organic polymer has been widely used because of its advantages such as wide response range, short response time, small hysteresis, easy preparation, and low cost. Research. High molecular polymers can be divided into resistive type and capacitive type according to their response characteristics. Due to their excellent comprehensive performance, polymer resistive humidity sensors are currently developing rapidly. They usually use interdigital electrode structures and moisture-sensitive materials. Evenly co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/12
CPCG01N27/125G01N27/121
Inventor 袁野张国珠
Owner WUXI HAOBANG HIGH TECH CO LTD
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