||As the longer life cycle and harsher application environment of the industrial automation product, its connector requires higher quality and better performance than other 3C products. Gold plating method is usually used to improve the durability and against the variability of the environment. However, the price of gold has become higher and higher in recent years. It caused a great effect on the connector cost and consequently it had a serious impact on the cost of end products.|
The price of connector is proportional to the thickness of gold plating, so the thickness of gold plating has reduced from 100 μinch in late 1960’s to 1970’s to less than 1 μinch nowadays in order to reduce the cost of connector. However, the porosity of the surface in gold plating coating is contrary to the thickness of gold plating layer. The porosity leads to corrosion on both the substrate material of gold plating coating and cladding exposing in the gas of external environment. This would occur the problems of connection failure or data missing in connector.
In order to find the relationship between durability and thickness of gold plating, the related test specifications of connector will be introduced in this thesis and the experiments will be conducted based on the specifications. In the end, some conclusions will be presented as the selection of connector coating as well as the reference for future research.
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 ASTM-B488-01 (2006), Standard Specification for Electrodeposited Coatings of Gold for Engineering Uses.
 ASTM B578 (Standard Test Method for Microhardness of Electroplated Coatings)
 ASTM B765 (Standard Guide for Selection of Porosity and Gross Defect Tests for Electrodeposits and Related Metallic Coatings)
 ASTM B735 (Standard Test Method for Porosity in Gold Coatings on Metal Substrates by Nitric Acid Vapor)
 ASTM B799 (Standard Test Method for Porosity in Gold and Palladium Coatings by Sulfurous Acid/Sulfur-Dioxide Vapor)
 ASTM B489 (Standard Practice for Bend Test for Ductility of Electrodeposited and Autocatalytically Deposited Metal Coatings on Metals)
 EIA-364-D (Electrical Connector /Socket Test Procedures Including Environmental Classifications)
 EIA-364-65A (Mixed Flowing Gas)
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 EIA-364-TS-1000.01, Environmental Test Methodology for Assessing the Performance of Electrical Connectors and Sockets Used in Business Office Applications.
 Yamasaki Seiki Kenkyusho Inc. Mixed Flowing Gas Corrosion Test Cabinet 技術手冊
 EIA-364-26B, Salt Spray Test Procedure for Electrical Connectors, Contacts and Sockets.
 EIA-364-31B, Humidity Test Procedure for Electrical Connectors and Sockets.