Presentation 2008-11-15
Contact Mechanisms and Contact Resistance Characteristics of Solid Tin and Plated Tin Contacts
Terutaka Tamai, Shigeru Sawada, Yasuhiro Hattori,
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Abstract(in Japanese) (See Japanese page)
Abstract(in English) Tin and its alloy have been applied to electrical contacts for low electrical conditions. Particularly, tin plated contacts are used widely to connector contacts for automotives. In the relationship between contact resistance (R) and increasing contact load (W) for both solid and plated tin, singularity characteristics were found. Well known deformation theories of the contact interfaces can not explain this singularity characteristic. This is very important for contact application. In this study, in order to clarify this singular characteristic, and to obtain a contact model explaining this phenomenon, contact traces for each contact load were examined by using SEM and STM. Obtained microscopic images indicated growth of piling-up of periphery of true contact area for both solid and plated tin. The sinking-in of tin surface forms piling-up around the periphery of the contact trace. In this deformation process, since the periphery of indented contact area severely slides against surface side of the platinum probe, contact resistance sharply decreases with W^<-2> characteristics.
Keyword(in Japanese) (See Japanese page)
Keyword(in English) connector / tin contacts / tin plating / contact resistance / contact area
Paper # EMD2008-78
Date of Issue

Conference Information
Committee EMD
Conference Date 2008/11/8(1days)
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Registration To Electromechanical Devices (EMD)
Language ENG
Title (in Japanese) (See Japanese page)
Sub Title (in Japanese) (See Japanese page)
Title (in English) Contact Mechanisms and Contact Resistance Characteristics of Solid Tin and Plated Tin Contacts
Sub Title (in English)
Keyword(1) connector
Keyword(2) tin contacts
Keyword(3) tin plating
Keyword(4) contact resistance
Keyword(5) contact area
1st Author's Name Terutaka Tamai
1st Author's Affiliation Mie University, Graduate School of Engineering, Laboratory of Vehicle Network Technology()
2nd Author's Name Shigeru Sawada
2nd Author's Affiliation Mie University, Graduate School of Engineering, Laboratory of Vehicle Network Technology
3rd Author's Name Yasuhiro Hattori
3rd Author's Affiliation AutoNetworks Technology, Ltd.
Date 2008-11-15
Paper # EMD2008-78
Volume (vol) vol.108
Number (no) 296
Page pp.pp.-
#Pages 4
Date of Issue