Electrical effects of fretting connector contact materials: A review

Abstract The fretting of electrical contacts can lead to unacceptable increases in contact resistance. Although this phenomenon was recognized for many years, considerable new work has been published recently on its occurrence and possible effect on the reliability of separable electronic connectors. The reason for these studies has been economic. Escalation in the cost of gold, the preferred contact material because of its nobility, stimulated interest in potential replacement metals such as Sn-Pb solder plate and palladium. Unfortunately, connectors with these replacement metals are prone to fretting failure. In this paper the fretting of electrical contacts is reviewed on the basis of work carried out by the present author and by other investigators. Included are a discussion of mechanisms of transfer, wear, oxidation and frictional polymerization which apply to the fretting of contacts and of the influence of operational parameters such as cycle rate and force on contact resistance, a survey of materials whose fretting behaviors have been determined and an analysis of the role of lubricants in controlling fretting degradation.

[1]  P. Murphy,et al.  The Evolution of Organic Vapors from Plastic Materials Associated with Electromechanical Relays , 1974 .

[2]  S. Chaikin.  On frictional polymer , 1967 .

[3]  P. Murphy,et al.  The Formation of Insulating Organic Films on Palladium-Silver Contact Alloys , 1974 .

[4]  J. Mottine,et al.  Investigation of Fretting Corrosion at Dissimilar Metal Interfaces in Socketed IC Device Applications , 1984 .

[5]  M. Braunovic,et al.  Surface Analysis of Fretting Damage in Electrical Contacts of Aluminum with different Contact Materials , 1984 .

[6]  M. Antler,et al.  Wear of gold electrodeposits: Effect of substrate and of nickel underplate , 1979, The Bell System Technical Journal.

[7]  J. Sletbak,et al.  Degradation of Electrical Contacts Caused by Oscillatory Micromotion Between the Contact Members , 1979 .

[8]  M. Braunovic,et al.  Effect of Fretting on the Contact Resistance of Aluminium with Different Contact Materials , 1979 .

[9]  M. Antler,et al.  Fretting corrosion of gold-plated connector contacts☆ , 1981 .

[10]  W. Abbott.  Time Distribution of Intermittents Versus Contact Resistance for Tin-Tin Connector Interfaces During Low Amplitude Motion , 1984 .

[11]  M. Antler.  Effect of Fretting on the Contact Resistance of Palladium Electroplate Having a Gold Flash, Cobalt-Gold Electroplate, and DG R156 , 1984 .

[12]  G. Russ.  A Comparative Study of Electroplated Palladium as a Contact Finish , 1983 .

[13]  M. Antler.  Fretting Corrosion of Solder-Coated Electrical Contacts , 1984 .

[14]  Nam P. Suh,et al.  The role of tribology in electrical contact phenomena , 1984 .

[15]  Morton Antler.  Fretting of Electrical Contacts , 1982 .

[16]  H. Hermance,et al.  Organic deposits on precious metal contacts , 1958 .

[17]  M. Antler,et al.  Gold Connector Contacts: Developments in the Search for Alternate Materials , 1975 .

[18]  Morton Antler,et al.  Effect of lubricants on frictional polymerization of palladium electrical contacts , 1983 .

[19]  B. Reagor,et al.  Structural Analysis of Deuterated and Nondeuterated Frictional Polymers Using Fourier Transform Infrared Spectroscopy and Pyrolysis Gas Chromatography/Mass Spectroscopy , 1981 .

[20]  M. Antler,et al.  Effect of Fretting on the Contact Resistance of Palladium , 1982 .

[21]  H. J. Keefer,et al.  Relay contact behavior under non-eroding circuit conditions , 1958 .

[22]  W. Freitag.  Lubricants for Separable Connectors , 1977 .

[23]  J. Ambier,et al.  Fretting Corrosion of Separable Electrical Contacts , 1985 .

[24]  Polymer Formation on Sliding Metals in Air Saturated with Organic Vapors , 1962 .

[25]  W. Freitag.  Wear, Fretting and the Role of Lubricants in Edge Card Connectors , 1976 .

[26]  M. Antler,et al.  Fretting of electrical contacts: An investigation of palladium mated to other materials , 1982 .

[27]  S. Krumbein,et al.  A Cost-Effective High-Performance Alternative to Conventional Gold Plating on Connector Contacts , 1983 .

[28]  M. Antler,et al.  Survey of Contact Fretting in Electrical Connectors , 1985 .

[29]  M. Braunovic,et al.  Evalutation of Different Types of Contact Aid Components for Aluminum-to-Aluminum Connectors and Conductors , 1985 .

[30]  W. Abbott,et al.  The Lubrication and Environmental Protection of Alternatives to Gold for Electronic Connectors , 1976 .

[31]  Atmospheric corrosion of clad palladium and palladium-silver alloys: film growth and contamination effects☆ , 1982 .

[32]  J. H. Tripp,et al.  Mechanical disruption of surface films on metals , 1966 .

[33]  Y. Matsui,et al.  Palladium with a Thin Gold Layer as a Sliding Contact Material , 1981 .

[34]  G. Mills.  Preliminary Evaluation of DIP/Socket Connection Reliability , 1979 .

[35]  H. Blanks.  Detection and Accelerated Testing of Vibration-Induced Connector Wear , 1984 .

[36]  J. Mottine,et al.  The Effect of Lubrication on Fretting Corrosion at Dissimilar Metal Interfaces in Socketed IC Device Applications , 1985 .