Contact protection layer for conductive terminal and formation method thereof

Abstract

The present invention discloses a contact protection layer for a conductive terminal. The contact protection layer for a conductive terminal comprises: a nickel layer formed on an outer surface of base metal of a conductive terminal; and a corrosion-resistant organic film formed on an outer surface of the nickel layer. A microporous structure distributed in a predetermined pattern is formed on thecorrosion-resistant organic film; and the microporous structure of the corrosion-resistant organic film is filled with noble metal to form a noble metal microstructure at the outer surface of the nickel layer. Besides, the present invention further discloses a formation method of the contact protection layer. In the invention, the noble metal microstructure is formed on the contact of the conductive terminal, and a noble metal layer is not formed on the contact of the conductive terminal to reduce the usage amount of the noble metal and reduce the manufacturing cost of the conductive terminal. The noble metal microstructure has good electrical conductivity to improve the electrical conductivity of the conductive terminal. The rest of part without being covered by the noble metal microstructure on the contact of the conductive terminal is covered with the corrosion-resistant organic film so as to improve the corrosion-resistant performance of the conductive terminal.

Description

technical field [0001] The invention relates to a contact protection layer of a conductive terminal and a method for forming the contact protection layer. Background technique [0002] Since the contact of the conductive terminal directly affects the electrical connection performance of the conductive terminal, it is desired that the contact of the conductive terminal has excellent conductive performance. Conductive terminals are usually made of copper, which has very good electrical conductivity, but copper has poor corrosion resistance and wear resistance. [0003] In order to effectively protect the contacts of the conductive terminals and prevent the contacts of the conductive terminals from being corroded and worn, in the prior art, it is usually necessary to plate a layer of noble metal, such as gold or silver, on the entire contact surface of the conductive terminals. Precious metals have excellent electrical conductivity, corrosion resistance and wear resistance. Th...

AI Technical Summary

Problems solved by technology

However, the reduction in the thickness of the noble metal layer on the conductive terminal will inevitably affect the electrical contact performance, corrosion resistance and wear resistance

Especially under severe environmental conditions, it can lead to corrosion and wear of the conductive terminals, which can lead to failure of the electrical contact of the conductive terminals

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