IEEE Transactions on Components, Hybrids, and Manufacturing Technology

Issue 1 • March 1985

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Displaying Results 1 - 25 of 35
  • Foreword

    Publication Year: 1985, Page(s): 2
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    Freely Available from IEEE
  • Make and Break Properties of Electrodeposits

    Publication Year: 1985, Page(s):70 - 79
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2373 KB)

    Properties of thin precious metal electrodeposits used as contact materials on base metals under make and break conditions are described. The investigations were carried out with the aid of a model device which simulated conditions existing in relays. The electrodeposits tested were AuCo 0.3, AuPd6Cu2, Pd, PdNi20, Rh, and Ag/Rh sandwich. For these electrodeposits contact resistance is discussed in... View full abstract»

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  • Temperature-Time Effects on Film Growth and Contact Resistance of a Plated Copper-Tin-Zinc Alloy used as a Surface Finish on Electronic Components

    Publication Year: 1985, Page(s):153 - 156
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (458 KB)

    An electrodeposited copper-tin-zinc alloy having a nominal composition in the range by weight of 55-65 percent Cu, 20-30 percent Sn, and 10-20 percent Zn is commonly used as a surface finish on electronic components, particularly fuse end caps. The contact resistance of brass disks plated with this alloy (1µm thick) is 1-10Omegadue to a film of the oxides of Sn, Zn, and some Cu. He... View full abstract»

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  • The Effect of Lubrication on Fretting Corrosion at Dissimilar Metal Interfaces in Socketed IC Device Applications

    Publication Year: 1985, Page(s):173 - 181
    Cited by:  Papers (14)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1964 KB)

    The early failure rate of socketed dual in-line package (DIP) devices that used dissimilar metal interfaces (Sn/Au and SnPb-solder/ Au) have been previously reported by the authors. These high resistance failures (both in field systems and in the laboratory) were attributed to the formation of tin oxide fretting corrosion at the device/socket interface. Lubrication of metal contacts has been shown... View full abstract»

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  • Behavior of Switching Arc in Low-Voltage Limiter Circuit Breakers

    Publication Year: 1985, Page(s):3 - 12
    Cited by:  Papers (34)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1016 KB)

    The noteworthy increase in the present low-voltage circuitbreaker capacity implies that these products must be able to dramatically reduce the short-circuit currents in electric installations. This important current limitation can only be obtained by rapidly inducing an arc voltage in the circuit breaker, that opposes the mains voltage. A preliminary computer calculation shows that the arc voltage... View full abstract»

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  • Fretting Corrosion of Separable Electrical Contacts

    Publication Year: 1985, Page(s):197 - 201
    Cited by:  Papers (11)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (696 KB)

    The fretting corrosion of separable electrical contacts was studied with different base materials and coatings. The tests were performed on a device which simulates a circuit breaker's separable contact. A vibrator monitored by a microcomputer controlled the vibration amplitude and frequency. The normal contact force was also adjustable. Contact resistance, temperature, and vibrator's excitation c... View full abstract»

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  • Thick-Film Ferrimagnetic Pastes Using Lithium Ferrite

    Publication Year: 1985, Page(s):221 - 227
    Cited by:  Papers (5)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1144 KB)

    The preparation of a thick-film ferrimagnetic paste using lithium ferrite powders and its physical, electrical, and magnetic properties are described. A resonance technique for the measurement of the dielectric constant, saturation magnetization, loss tangents, and resonance linewidth of the ferrite films at microwave frequencies is presented. Applicability of the ferrite pastes developed for the ... View full abstract»

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  • Commutation and Erosion in Hybrid Contactor Systems

    Publication Year: 1985, Page(s):34 - 39
    Cited by:  Papers (13)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (896 KB)

    Basic investigations of the commutation and switching mechanisms between contacts and parallel thyristors and on results of erosion measurements at currents up to 500 A, 220 V, 50 Hz are reported. The experiments are carried out with different contact materials (copper, hard silver, silver/metal oxide compound). Depending on thyristor data; commutation inductance, contact material, and current, th... View full abstract»

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  • High-Current Arc Gap With Ablative Wall: Dielectric Recovery and Wall-Contact Interaction

    Publication Year: 1985, Page(s):129 - 134
    Cited by:  Papers (11)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1016 KB)

    The purpose of this study is to examine the effects of wallmaterial ablation and contact materials on the recovery of an arc gap. A capacitive discharge current source provides 60-Hz arc currents up to 8 kA, and recovery is measured by reapplyiag a voltage step of 1 kV at a preselected time after current zero. The arc gap is surrounded by a cylindrical wall of an ablative insulating material. Both... View full abstract»

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  • Distribution of Chopping Current for Copper Electrodes in Vacuum in Axial Magnetic Field

    Publication Year: 1985, Page(s):182 - 186
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (632 KB)

    Previously developed models of chopping current distribution for contacts in vacuum without the presence of magnetic field are discussed. Justification for applying the maximum value asymptotic distribution for evaluation of the expectation of current chopping has been presented. The experimental results have served for the assessment of the axial magnetic field influence on the parameters of the ... View full abstract»

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  • Damage of Flexible Printed Wiring Board Associated with Lightning Induced Voltage Surges

    Publication Year: 1985, Page(s):214 - 220
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1992 KB)

    Damage produced on flexible printed wiring boards (PWB's) while in service has been found, and examination of them suggests that the damage was caused by flashover from lightning pickup surges. Laboratory simulation of lightning pickup surges on printed wiring circuits produced similar damage, whereas simulated ac power crosses did not. Blackened area between conductors are not burnt but are shown... View full abstract»

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  • Reduction of Particle Growth Rate and Slip-Ring Assembly Segmented Rings

    Publication Year: 1985, Page(s):114 - 118
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1224 KB)

    A study was conducted to determine a method of reducing particle growth rate between slip-ring assembly (SRA) brushes and segmented rings. The particles from the SRA were analyzed using a scanning electron microscope (SEM) to determine the formation mechanism. An X-ray fluorescence analysis of the particle revealed its material composition. Three approaches were then considered as the most likely ... View full abstract»

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  • Electroplated Palladium-Silver (60/40 wt%) Alloy as a Contact Metal

    Publication Year: 1985, Page(s):163 - 172
    Cited by:  Papers (8)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1912 KB)

    Palladium-silver wrought alloys have been used for many years as a contact metal for electrical contacts and connectors, and have successfully replaced gold in many applications. Palladium-silver electroplated alloys are now presented that have the desirable properties of the equivalent wrought alloys and can be used whenever electroplating wouid be advantageous. Electroplated 60/40 palladium-silv... View full abstract»

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  • Variation of Arc Duration of Electric Contacts Due to Controllable Atmospheric Condition

    Publication Year: 1985, Page(s):29 - 33
    Cited by:  Papers (9)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (648 KB)

    A new measuring system Of contact phenomena has been developed, which can control noncorrosive atmospheric conditions such as air pressure, mixture of air and noncorrosive gas, and electrode temperature. The developed system is controlled by a microcomputer and measured quantities can be processed also by the microcomputer, and the final data can be printed Out and/or displayed. Arc duration and c... View full abstract»

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  • Survey of Contact Fretting in Electrical Connectors

    Publication Year: 1985, Page(s):87 - 104
    Cited by:  Papers (136)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (4312 KB)

    Fretting in mated electronic connectors can lead to unacceptable increases of contact resistance. Although this phenomenon has been known for many years, it was not until interest developed in replacing gold by certain low-cost contact materials, such as tin-lead solder plate, that the incidence of fretting problems rose dramatically. Over the past 10 years there has been considerable research on ... View full abstract»

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  • Wear Resistance of Electroplated Nickel-Hardened Gold

    Publication Year: 1985, Page(s):123 - 128
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1232 KB)

    Wear resistance and hardness of nickel-hardened gold electroplated at current densities between 1 and 16 A/dm2and containing between 0.2 and 2.5 wt% nickel have been studied. In the current density range 1-4 A/dm2the wear changed from severe to mild and then to brittle upon increasing the nickel content in the deposit. In the range 4-16 A/ dm2the wear changed from ... View full abstract»

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  • Wear Properties of High Speed Gold Electrodeposits

    Publication Year: 1985, Page(s):46 - 51
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1040 KB)

    It had been observed that electrodeposits from acid goldplating solutions, when produced under production plating conditions, possessed variable wear characteristics. A laboratory study was undertaken to investigate the factors affecting the wear resistance of these gold deposits. The effect of plating parameters on wear resistance and deposit composition were examined to determine the optimum pla... View full abstract»

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  • Design of a Compliant Press-Fit Pin Connection

    Publication Year: 1985, Page(s):40 - 45
    Cited by:  Papers (10)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (608 KB)

    A design method for a compliant press-fit pin connection in a plated through hole (PTH) is presented. In this connection, both compliant press-fit pin and PTH cause elastic-plastic deformation. Considering this feature, three fundamental design concepts for this connection are discussed. First, three design conditions are set: 1) the upper limit of pin insertion force to protect the copper plate o... View full abstract»

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  • Wear Resistance Characterization for Plated Connectors

    Publication Year: 1985, Page(s):142 - 147
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (944 KB)

    The wear resistance of connectors plated with precious metal and precious metal alloy systems is characterized under conditions of high normal load (300 g) in tests ranging from !00 to 25 000 mating cycles. Contact resistance measurements and optical microscopy as well as the surface analytical techniques of Auger electron spectroscopy and · , .. . energy-dispersive X-ray analysis are utilize... View full abstract»

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  • The Influence of Plastic Encapsulation, Overglaze, and Voltage on Anomalous Behavior of Thick-Film Resistors

    Publication Year: 1985, Page(s):207 - 213
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (736 KB)

    Eariier detailed studies of the aging mechanisms of thickfilm resistors revealed anomalous behavior in which certain resistors appeared to be sensitive to the voltages applied to them, but only when they were plastic-encapsulated and not overglazed. These anomalies have been deliberately provoked in a further special study, reported here, of the influence of encapsulation and the effectiveness of ... View full abstract»

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  • The Interaction Between an Arc in the Contact Gap and the Insulation Barrier

    Publication Year: 1985, Page(s):109 - 113
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (768 KB)

    The transverse component of the electromagnetic force created in an intercontact gap due to arcing presses the arc to the insulation surrounding the gap which can cause serious damage to the insulation. The depth of the transformed insulation layer under the main arc track is considered as a measure of the degree of thermal damage. The form and dimensions of this layer are investigated experimenta... View full abstract»

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  • Erosion Characteristics of Silver-Based Contact Materials In a DC Contactor

    Publication Year: 1985, Page(s):64 - 69
    Cited by:  Papers (12)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (928 KB)

    Electrical life tests in a dc contactor are performed under DC4 and DC5 conditions. Results from our observations and erosion measurements are compared for different silver-based contact materials. For the device used a relation can be established between the arc energy and material loss and transfer. The erosion mechanism during the make operation determines the overall arc erosion to a larger th... View full abstract»

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  • Chopping Current and Quenching Capability of Low-Voltage Vacuum Arcs

    Publication Year: 1985, Page(s):157 - 162
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (816 KB)

    The chopping current and the quenching capability during switching-off in a vacuum are investigated using Cu/Cr, Mo/Cu, and W/ Cu with added materials of high vapor pressure. Cylindrical contacts of small dimensions (15 mm diameter) with antimony, bismuth, cadmium, and zinc alloyed or added in solid form in holes or slots are used. The chopping current is determined duiing interrupting a 50-Hz cur... View full abstract»

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  • Effect of Space Angle of Constriction Resistance and Contact Resistance for the Case of Line Contact

    Publication Year: 1985, Page(s):228 - 234
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (696 KB)

    It can generally be considered that an actual contact makes an angle with the extension of the contact surface, because the tip of a contact element is convex in shape (macroscopically) and has surface roughness (microscopically). There are, however, few studies that have taken into account the effect of this angle on the constriction resistance or the contact resistance. A line contact is taken a... View full abstract»

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  • The Thermostructural Response of Electic Contacts Having Brazy Defects

    Publication Year: 1985, Page(s):187 - 196
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (800 KB)

    The thermostructural response of an electric contact having planar type defects at the brazed interface was investigated using a finite element model. The results of the analysis have indicated that the presence of a defect alters the temperature field. This perturbation of the temperature by the defect produces localized stresses that can affect the life of the contactor. View full abstract»

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Aims & Scope

This Transaction ceased production in 1993. The current publication is titled IEEE Transactions on Components, Packaging, and Manufacturing Technology.

Full Aims & Scope