Electric contact and manufacturing method therefor

A technology of electrical contacts and connecting circuits, which is applied in the field of composite materials, can solve the problems of placing electrical contacts upside down, etc., and achieve the effects of improving yield rate, wide selection of materials, and controllable costs

Inactive Publication Date: 2016-12-07
NANTONG MEMTECH TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Purpose of the invention: In order to overcome the hidden danger of the electrical contacts being placed upside down when producing button products, the present invention provides a two-layer An electrical contact made of a composite of one or more layers of metal sheets and polymer materials. The buttons made of this electrical contact, because the composition of the two surfaces of the electrical contact is consistent, there is no inversion of the electrical contact. phenomenon, so as to ensure that the key has a reliable electrical conduction function

Method used

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  • Electric contact and manufacturing method therefor
  • Electric contact and manufacturing method therefor
  • Electric contact and manufacturing method therefor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030]A bright 0.05mm thick vinyl tri-tert-butyl peroxysilane (VTPS) treated pure nickel sheet (nickel content greater than 99.5%), and silicone rubber compound (containing Dow Corning silicone rubber SE-4706U100 1 part, peroxide vulcanizing agent DCP 1 part) Pressing at 180 ℃ to make a composite sheet with a thickness of 0.5 mm, use instant adhesive or room temperature curing silicone rubber-metal adhesive to seal the rubber of this composite sheet The surface is bonded to a nickel metal sheet with a thickness of 0.05 mm to obtain a composite sheet of two layers of metal sheets and rubber. The obtained composite sheet was punched into small discs with a diameter of 5 mm. The material or chemical composition of the two circular surfaces of this small disc is the same, and the contact resistance of the two circular surfaces is also the same. This small disc, as an electrical contact, is compounded with silicone rubber by thermal vulcanization and bonding, so that a silicone ru...

Embodiment 2

[0032] The materials used in Example 1 were also used in Example 2. In order to improve the production efficiency of the composite sheet, the composite sheet was laminated in the manner of nickel metal sheet-polymer material-nickel metal sheet, and the laminated materials were pressed at 175°C for 10 minutes. The obtained composite sheet is punched into small discs with diameters of 2mm, 5mm and 8mm. This small disc can also be used as an electrical contact to produce silicone rubber keys.

Embodiment 3

[0034] As in Example 1, but the metal sheet used is a 316 stainless steel sheet, the thickness of the stainless steel sheet is 0.1 mm, and the electroless plating method is used on the stainless steel sheet to first plate a layer of nickel coating with a thickness of 1 μm, and then electroplate the nickel coating. A cylindrical electroformed layer with an average thickness of 0.7 μm and a gold content of more than 99.9% is cast. The purpose of electroforming gold on the stainless steel sheet is to reduce the surface contact resistance of the electrical contacts and increase the electrical conductivity and service life of the electrical contacts. Using a flat vulcanizer, under the condition of 175°C×10 minutes, the electroformed gold stainless steel-polymer material-electroformed gold stainless steel is thermally vulcanized to make a composite sheet with a thickness of 1.0mm, and the composite sheet is punched Cut into small discs with a diameter of 5mm, the contact resistance ...

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Abstract

The invention discloses an electric contact with the upper and lower surfaces being made of metal, especially an electric contact with the chemical compositions of the upper and lower surface being consistent. The electric contact is a small sheet which is formed by the laminated recombination of two or multiple metal layers with the thickness of 0.1-8mm and a high molecular material in a mode of metal-high molecular material-metal or metal-high molecular material-metal-high molecular material-metal. The two surfaces of the prepared electric contact are made of metal, and the contact resistances of the two surfaces are very low. In particular, the two surfaces of the electric contact with the two surfaces having the same chemical composition have the same or very similar contact resistances, thereby eliminating a phenomenon that a key switch is not connected because of the reverse placing of the electric contact when an electric contact which is formed by the recombination of a single-layer metal sheet and the high molecular material is used for producing a key product.

Description

technical field [0001] The invention relates to the field of composite materials, more specifically, the invention relates to composite conductive materials, which are suitable for making electrical contacts of keys. Background technique [0002] The electrical contact is a key component in the key, and it is usually used to pair with the contact switch of the printed circuit board (PCB). It must have low contact resistance. If the contact resistance is too large, it will cause the function of the key switch to fail and misjudgment. [0003] The patent document "Connector with Metallized Coated Polymer Contacts" with application number 200810085671.7 discloses a connector with metallized coated polymer-based contacts. Application No. 201110027418.8 patent document "Rubber Conductive Particles and Preparation Method thereof" discloses a rubber substrate and rubber conductive particles with metal coating on its surface (rubber conductive particles are a kind of electrical co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01H1/04H01H1/06H01H11/04
CPCH01H1/04H01H1/06H01H11/04
Inventor 丁阳张红梅苏灵子韩辉升
Owner NANTONG MEMTECH TECH
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