NDLI: Investigation of Relaxation Behavior for Terminals of CPU Socket Connectors

Content Provider	IEEE Xplore Digital Library
Author	Liao, K.-C. Wei-Chong Chiu
Copyright Year	2008
Description	Author affiliation: Nat. Taiwan Univ., Taipei (Liao, K.-C.)
Abstract	Terminals of a CPU socket connector dominate signal transmission between the CPU and the motherboard. Contact forces between the terminal of an electronic connector and the corresponding counterparts generally play an important role in signal transmissions. The contact forces of these terminals, however, could decay gradually due to the stress relaxation effect under the high temperature conditions. A finite element analysis is carried out to examine the relaxation phenomenon of the terminal in the present study. The strain-hardening form of the power-law creep model is adopted to account for the relaxation behavior of the terminal material. According to the field life acceleration test specifications established by the Electronic Industry Association (EIA), relationships between the calculated contact force and duration period are then constructed. Moreover, the contact force of the terminal subjected to thermal cycling test is also investigated. Calculations show that the decreased amount of the contact force is rather limited. Associated electrical resistances of the current terminal are further measured to validate the suitability of the contact force as an index of the signal transmission quality.
Starting Page	74
Ending Page	77
File Size	141089
Page Count	4
File Format	PDF
ISBN	9781424419012
DOI	10.1109/HOLM.2008.ECP.25
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2008-10-27
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Sockets Connectors Contacts Thermal force Force measurement Stress Temperature Finite element methods Creep Life estimation
Content Type	Text
Resource Type	Article

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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