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Paper Abstract and Keywords
Presentation 2016-10-21 15:45
Degradation of gold plated contacts under high temperature and effectiveness of contact lubricant
Terutaka Tamai (Elcontech), Masahiro Yamakawa, Yuta Nakamura (Tetra), Ichiro Takano (Kokgakuin) EMD2016-49
Abstract (in Japanese) (See Japanese page) 
(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) 
(in English) contact lubricants / gold plate / olefin / connector / 電気接触部 / リフロー / /  
Reference Info. IEICE Tech. Rep., vol. 116, no. 261, EMD2016-49, pp. 19-27, Oct. 2016.
Paper # EMD2016-49 
Date of Issue 2016-10-14 (EMD) 
ISSN Print edition: ISSN 0913-5685    Online edition: ISSN 2432-6380
Copyright
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reproduction		 All rights are reserved and no part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, recording, or any information storage and retrieval system, without permission in writing from the publisher. Notwithstanding, instructors are permitted to photocopy isolated articles for noncommercial classroom use without fee. (License No.: 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034)
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Conference Information
Committee EMD  
Conference Date 2016-10-21 - 2016-10-21 
Place (in Japanese) (See Japanese page) 
Place (in English)  
Topics (in Japanese) (See Japanese page) 
Topics (in English)  
Paper Information
Registration To EMD 
Conference Code 2016-10-EMD 
Language English (Japanese title is available) 
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  
Keyword(7)  
Keyword(8)  
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)
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Speaker Author-1 
Date Time 2016-10-21 15:45:00 
Presentation Time 30 minutes 
Registration for EMD 
Paper # EMD2016-49 
Volume (vol) vol.116 
Number (no) no.261 
Page pp.19-27 
#Pages 9 
Date of Issue 2016-10-14 (EMD) 

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