NDLI: Preliminary Studies of Tin and Tin Rich Coatings as Electrical Contact Materials

Content Provider	IEEE Xplore Digital Library
Author	Blackler, R. Warwick, M. Long, J.
Copyright Year	1978
Abstract	The soaring price of gold has led the gold-using industries to search for alternative materials. Gold plating on electrical connectors and circuit boards has been commonplace, and in some cases, the only viable material. However in other cases its use is an unnecessary expense. Tin and tin alloy coatings have been used extensively in the electronics industry, particularly to confer solderability to the substrate, and many people have seen them as possible alternatives to gold plating in a number of connector applications. First the literature on the properties of tin and tin alloys pertaining to their use as contact materials is reviewed, including some information regarding contact resistance and the effects of atmospheric pollutants. Second, some of the basic theory regarding contact resistance are reviewed; and last, an experimental procedure devised to provide basic contact resistance and data on different tin-based coatings for different loads using conical, hemispherical, and chisel shaped indenters are described. The results of these measurements are reported and compared with gold-plated finishes.
Sponsorship	IEEE Electronic Industries Alliance American Society of Mechanical Engineering (ASME) NBS SAE
Starting Page	294
Ending Page	303
Page Count	10
File Size	1520947
File Format	PDF
ISSN	01486411
Volume Number	4
Issue Number	3
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1981-09-01
Publisher Place	U.S.A.
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Coatings Gold Contact resistance Connectors Tin alloys Printed circuits Electronics industry Pollution Atmospheric measurements Electrical resistance measurement
Content Type	Text
Resource Type	Article
Subject	Industrial and Manufacturing Engineering Electronic, Optical and Magnetic Materials Engineering Electrical and Electronic Engineering

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