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Preparation technology of stainless steel-based plate coated with constantan foil for pressure sensor

A technology of pressure sensor and preparation process, which is applied in the cross field of electronic materials and chemical industry, to achieve the effects of low deformation, high thermal conductivity, dielectric strength and high bonding strength

Active Publication Date: 2018-09-21
XIANYANG TIANHUA ELECTRONICS SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, in automatic control industries such as automobiles, intelligent robots, precision electronic scales, and automatic water dispensers, widely used precision pressure sensors require special circuit substrates to carry sensor components due to special working environments. Copper-clad laminates of various types of conventional substrates such as paper Base, glass fiber cloth base, aluminum base and copper base copper clad laminates cannot meet the demand. It is necessary to develop a new type of stainless steel base constant copper foil plate to meet the working requirements of precision pressure sensor components. For example, stainless steel base material has small deformation, vibration resistance, and health Copper foil as a circuit layer has very high resistance and corrosion resistance. The resistance value depends on the thickness and length of the line. In order to meet the design requirements, when the line width is 0.025mm, the adhesive must have a high resistance. Bond strength

Method used

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  • Preparation technology of stainless steel-based plate coated with constantan foil for pressure sensor
  • Preparation technology of stainless steel-based plate coated with constantan foil for pressure sensor
  • Preparation technology of stainless steel-based plate coated with constantan foil for pressure sensor

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preparation example Construction

[0039] The preparation method of component A is as follows: in terms of mass percentage, each raw material is uniformly mixed; the preparation method of component B is as follows: in mass percentage, each raw material is uniformly mixed.

[0040] Stainless steel surface treatment:

[0041] The stainless steel plate undergoes a 5-10min degreasing process, and the pressing surface is polished and brushed at a speed of 0.1-0.3m / mim. After completion, it is baked at 95-110°C for 10-15min, and the surface is brushed with 4wt% silane coupling agent after cooling down. Methanol solution, bake at 120-140°C for 7-10 minutes.

[0042] 2) Hot pressing forming process

[0043] Use a screen printing machine to print the filtered glue on the surface-treated stainless steel surface, and control the thickness of the glue layer to be about 60-85 microns. After the screen printing is completed, place it for 10-20 minutes, transfer it to an oven, and place it at 100-110°C for about 20-30 minute...

Embodiment 1

[0047] A component, by mass percentage, includes the following raw materials:

[0048]

[0049] Component B, by mass percentage, includes the following raw materials:

[0050] High-purity alumina (1-5 microns) 65%

[0051] Boron nitride nanosheets (thickness 0.5 microns, length 1-2 microns) 32%

[0052] Complex Surfactant 3%

[0053] The preparation process is prepared by the following three steps.

[0054] 1) Mixed glue preparation, surface treatment of heat-conducting particles

[0055] According to the mass percentage of each raw material of component A, epoxy resin E44, solid novolac epoxy 702, alicyclic epoxy TDE85, tackifying resin ZF25, epoxy grafted polyvinyl butyral EPVB, and modified DDM were cured Agent D-113 and tertiary amine catalyst DMP-30 were mixed, then a mixed solvent of 35% by mass of component A was added, and fully stirred at room temperature for 3 hours to obtain the first mixed solution.

[0056] According to the mass percentage of each raw materi...

Embodiment 2

[0063] A component, by mass percentage, includes the following raw materials:

[0064]

[0065] Component B, by mass percentage, includes the following raw materials:

[0066] High-purity alumina (1-5 microns) 70%

[0067] Boron nitride nanosheets (thickness 0.5 microns, length 1-2 microns) 28%

[0068] Complex surfactant 2%

[0069] The preparation process is prepared by the following three steps.

[0070] 1) Mixed glue preparation, surface treatment of heat-conducting particles

[0071] According to the mass percentage of each raw material of component A, epoxy resin E44, solid novolac epoxy 702, alicyclic epoxy TDE85, tackifying resin ZF25, epoxy grafted polyvinyl butyral EPVB, and modified DDM were cured Agent D-113 and tertiary amine catalyst DMP-30 were mixed, then a mixed solvent of 30% of the mass of component A was added, and fully stirred at room temperature for 4 hours to obtain the first mixed solution.

[0072] According to the mass percentage of each raw ...

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Abstract

Provided is a preparation technology of a stainless steel-based plate coated with constantan foil for a pressure sensor. A glue solution is printed on the surface of stainless steel after surface treatment is carried out by adopting a screen printing machine, the thickness of a glue line is 60-85 micrometers, and after screen printing is completed, drying is carried out; lastly, a surface dry coating stainless steel surface is covered with constantan foil, and a mirror surface steel plate covers the stainless steel surface, then the stainless steel surface covered with the constantan foil andthe mirror surface steel plate is placed into a vacuum hot press machine for hot pressing, after hot pressing is completed, the temperature is reduced to a room temperature, and the stainless steel-based plate coated with the constantan foil is obtained. The prepared stainless steel-based plate coated with the constantan foil has very low deformability, higher heat conductivity and dielectric strength, a constantan foil shiny side and the stainless steel-based plate have very high bonding strength, the highest bonding strength reaches 2.1 newtons per millimeter, and the stainless steel-based plate coated with the constantan foil has very high heat-resisting stress and other properties. According to the preparation technology of the stainless steel-based plate coated with the constantan foil for the pressure sensor, the constantan foil for preparing the stainless steel-based plate coated with the constantan foil is made into a circuit by etching, an integrated electronic device can be made into the pressure sensor, so the stainless steel-based plate coated with the constantan foil is a pressure sensor special mother board.

Description

technical field [0001] The invention relates to a preparation process of a stainless-steel-based clad constantan copper foil plate for a pressure sensor, which belongs to the intersecting field of electronic materials and chemical industry. Background technique [0002] Compared with traditional copper-clad laminates such as paper-based and glass fiber cloth-based copper-clad laminates, circuit boards used in precision pressure sensors have requirements and properties that other copper-clad laminates cannot meet. For example, the stainless steel substrate and circuit layer are required to have extremely high bonding strength (about 5 micron thick smooth constantan alloy foil conductive layer is not conducive to the rough surface of bonding); in addition, other characteristics of copper clad laminates such as thermal stress, electrical insulation, low water absorption and other properties need to be satisfied. In order to adapt to the actual working environment, working accur...

Claims

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Application Information

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IPC IPC(8): H01L41/22H01L41/193B32B15/08
CPCB32B15/08H10N30/857H10N30/01
Inventor 周文英张祥林闫智伟
Owner XIANYANG TIANHUA ELECTRONICS SCI & TECH
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