| Presentation | 2016-10-21 Degradation of gold plated contacts under high temperature and effectiveness of contact lubricant Terutaka Tamai, Masahiro Yamakawa, Yuta Nakamura, Ichiro Takano, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | Contact failures for down size of connector contacts with low contact force and cost down of gold plated are serious problem to be solved. One solution is application of lubricants. Particularly these contacts are exposed to elevated temperature under reflow treatment in assembling processes. It is an important subject should be clarified that the deterioration of increases in contact resistance properties under the reflow. One cause of this deterioration is a surface contamination due to oxidation of diffused small amount of additives through gold plated layer. The other should be decomposition of the coated lubricants. In this study, degradation of contact resistance properties were measured, and change of images of STM for exposure time for high temperature were observed. The clean gold plated surface and heated clean surface were examined by using XPS and AES analysis. As results, contact resistance properties of clean surface were found to degrade under elevated temperature. This degradation was found due to oxidation of base metal nickel and cobalt additive to gold plated surface. However, influence of the contact lubrication on the degradation of contact resistance was not recognized. The change of composition of the lubricant was discussed by using STM images. Growth of oxide film on the clean surface was found as cubic law. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | contact lubricants / gold plate / olefin / connector / 電気接触部 / リフロー |
| Paper # | EMD2016-49 |
| Date of Issue | 2016-10-14 (EMD) |
| Conference Information | |
| Committee | EMD |
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| Conference Date | 2016/10/21(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | |
| Chair | Yoshiteru Abe(NTT) |
| Vice Chair | |
| Secretary | (Sumitomo Denso) |
| Assistant | Yoshiki Kayano(Univ. of Electro-Comm.) / Yuichi Hayashi(Tohoku Gakuin Univ.) |
| Paper Information | |
| Registration To | Technical Committee on Electromechanical Devices |
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| Language | ENG-JTITLE |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Degradation of gold plated contacts under high temperature and effectiveness of contact lubricant |
| Sub Title (in English) | |
| Keyword(1) | contact lubricants |
| Keyword(2) | gold plate |
| Keyword(3) | olefin |
| Keyword(4) | connector |
| Keyword(5) | 電気接触部 |
| Keyword(6) | リフロー |
| 1st Author's Name | Terutaka Tamai |
| 1st Author's Affiliation | Elcontech Consulting Inc.(Elcontech) |
| 2nd Author's Name | Masahiro Yamakawa |
| 2nd Author's Affiliation | Tetra Co. Ltd.(Tetra) |
| 3rd Author's Name | Yuta Nakamura |
| 3rd Author's Affiliation | Tetra Co. Ltd.(Tetra) |
| 4th Author's Name | Ichiro Takano |
| 4th Author's Affiliation | Kogakuin University(Kokgakuin) |
| Date | 2016-10-21 |
| Paper # | EMD2016-49 |
| Volume (vol) | vol.116 |
| Number (no) | EMD-261 |
| Page | pp.pp.19-27(EMD), |
| #Pages | 9 |
| Date of Issue | 2016-10-14 (EMD) |