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High voltage-resisting thin film pressure sensor and preparation method thereof

A film pressure and high voltage technology, applied in the field of sensors, can solve the problems of easy current breakdown and low AC resistance, and achieve the effects of good insulation, strong AC resistance and strong chemical stability.

Active Publication Date: 2019-08-09
重庆华知光环保科技有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of this, the purpose of the present invention is to provide a high-voltage resistant thin-film pressure sensor and its preparation method, which can overcome the current breakdown of the thin-film pressure sensor in the prior art when it is subjected to high voltage, and its anti-AC capability. lower question

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Examples

Experimental program
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Effect test

Embodiment 1

[0037] The acetophenone modified SiO of the present embodiment 2 The preparation method is as follows:

[0038] C1, take nano-SiO 2 100 grams of powder, add 400 grams of 0.2mol / L hydrochloric acid, and activate it for 5-10 minutes under stirring at 40r / min;

[0039] C2, then activate the SiO 2 Take out the powder, wash it with water for 3 times, remove the hydrochloric acid, add 250 g of 0.15 mol / L HF solution, heat to 60-70 °C under stirring at 60 r / min, and keep it for 15 min to obtain the mixed solution 1;

[0040] C3. Add 75 grams of 0.15 mol / L bromoacetophenone and 175 grams of 0.15 mol / L TBDPS solution to mixed solution 1, and heat to a temperature of 60-70° C. to obtain mixed solution 2;

[0041] C4. Filter the mixed solution 2 and dry it at 40-50°C to obtain acetophenone-modified SiO 2 .

[0042] The preparation method of the thin film pressure sensor of the present embodiment is as follows,

[0043] A1. Provide the substrate, the substrate is a stainless steel r...

Embodiment 2

[0047] Compared with embodiment 2, its difference is only that embodiment 2 uses common SiO 2 As an insulating layer, the specific operation steps for the preparation of its thin film pressure sensor are as follows:

[0048] A1. Provide the substrate, the substrate is a stainless steel rod, and the end face is round, and the precipitated acetophenone modified SiO 2 Before the thin film insulating layer, adjust the laser wavelength to 532nm, the laser pulse width to 10ns, the frequency to 1.5Hz, and the energy density to 1.5J / cm 2 , keep the sputtering pressure at 14Pa, carry out pre-sputtering for 4min, remove the surface contamination of the substrate, place the treated substrate in a vacuum chamber with a vacuum degree of 2Pa, adjust the distance between the laser target and the substrate to 30mm, and use a flowmeter to Into the vacuum chamber with a mass flow ratio of 30:60 of oxygen and argon with a concentration of more than 99% and a heating rate of 15-20°C / min to heat ...

Embodiment 3

[0052] Compared with Example 1, Example 3 differs only in that: Example 3 uses ion beam sputtering deposition technology to deposit acetophenone-modified SiO on the substrate. 2 Thin film insulation.

[0053] The specific operation steps of depositing the insulating layer are as follows:

[0054] S1. Set the ion energy of the argon ion beam generated by the main ion source to 500-800eV, and set the ion beam current density to 0.4-0.6mA / cm 2 ; and keep the background pressure of the vacuum chamber at 3×10-3Pa or below, and control the film deposition rate to 20-30nm / min; the rotation speed of the workpiece table is 7-9rpm, and the deposition angle is 45°;

[0055] S2. Use the argon ion beam generated by the main ion source to bombard the tantalum target on the target platform, so that the particles sputtered from the target react with the oxygen ion beam generated by the auxiliary ion source and deposit on the elastic substrate to form dioxide Tantalum base film;

[0056] S3...

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Abstract

The invention discloses a high voltage-resisting thin film pressure sensor and a preparation method thereof. The high voltage-resisting thin film pressure sensor comprises a substrate, an acetophenone-modified SiO2 thin film insulating layer, a strain resistance layer and a lead film, wherein the insulating layer is arranged on the substrate; the strain resistance layer is arranged on the insulating layer; the lead film is arranged on the strain resistance layer; the thickness of the acetophenone-modified SiO2 thin film is 0.6 to 0.8 mm; and the binding force of the acetophenone-modified SiO2thin film to the substrate is 30 to 50 mN. The preparation method comprises the following steps: a substrate is provided, and an acetophenone-modified SiO2 thin film insulating layer is deposited on the substrate by a pulsed laser deposition method; a first photoresist is made on the insulating layer, and with the first photoresist as a mask, a multi-element target material is adopted to deposit the strain resistance layer on the insulating layer through the pulsed laser deposition method; and the lead film is deposited on the strain resistance layer through the pulsed laser deposition method.The problems that the thin film pressure sensor in the prior art is easily broken down by current in the case of high voltage, and the anti-AC ability is low can be overcome.

Description

technical field [0001] The invention relates to the technical field of sensors, in particular to a film pressure sensor capable of resisting high voltage and a preparation method thereof. Background technique [0002] A sensor is a device or device that can sense what is being measured and convert it into a usable output signal according to certain rules. As an important means of information acquisition, sensors, together with communication technology and computer technology, constitute the three pillars of information technology. Thin-film pressure sensors have the advantages of good stability, high precision, and adaptability to harsh environments. They are widely used in the measurement of pressure parameters in various fields such as national defense, aerospace, industrial production, and automatic control. With the rapid development of my country's missile weapons, launch vehicles, satellites, space stations and high-speed rail technologies, many military and civilian ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01L1/22
CPCG01L1/2293
Inventor 牟洪江曾彦吕坤颐蔡川王来志
Owner 重庆华知光环保科技有限责任公司
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