Reduction of metallic surface oxides via an electrochemically-generated redox species

Tench, D.; Anderson, D. P.; Jambazian, P.; Kim, P.; Warren, Leslie F.; Hillman, D.; Lucey, G. K.

doi:10.1007/bf00241589

Cited by 6 publications

(2 citation statements)

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“…In this Reduced Oxide Soldering Activation (ROSA™) process, [1][2][3][4] surface oxides that interfere with solder wetting are electrolessly reduced back to the metallic state by a highly reducing vanadous ion solution that is non-corrosive to most metals and is regenerated electrochemically. The electroless reduction and electrochemical regeneration form a closed chemical loop, from which the only effluent is oxygen gas.…”

Section: Introductionmentioning

confidence: 99%

Fluxless Wave Soldering

et al. 1995

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If you would like to write for this, or any other Emerald publication, then please use our Emerald for Authors service information about how to choose which publication to write for and submission guidelines are available for all. Please visit www.emeraldinsight.com/authors for more information. About Emerald www.emeraldinsight.comEmerald is a global publisher linking research and practice to the benefit of society. The company manages a portfolio of more than 290 journals and over 2,350 books and book series volumes, as well as providing an extensive range of online products and additional customer resources and services.Emerald is both COUNTER 4 and TRANSFER compliant. The organization is a partner of the Committee on Publication Ethics (COPE) and also works with Portico and the LOCKSS initiative for digital archive preservation.ABSTRACT -Fluxless wave soldering in a nitrogen atmosphere was investigated for epoxy-fibreglass circuit board coupons having bare copper and solder-coated through-holes. The Reduced Oxide Soldering Activation (ROSA™) pretreatment was found to consistently provide good hole filling and through-hole solder joints of excellent appearance. For preheated coupons, low levels of residual oxygen and short exposure to air after the ROSA treatment were found to have no effect.

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Section: Introductionmentioning

confidence: 99%

Fluxless Wave Soldering

et al. 1995

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“…Earlier work showed that the preferred electrolyte is pH 0.5 vanadous sulfate solution. 3 The ROSA treatment can be used as part of a fluxless soldering process or to enhance the performance of no-clean and water-soluble fluxes.…”

Section: Introductionmentioning

confidence: 99%

A new reduced-oxide soldering activation method

Tench

Anderson

Jambazian

et al. 1995

JOM

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This article describes a new reduced-oxide soldering activation (ROSATM) process that removes oxides from tin, tin-lead, and copper surfaces without the use of a flux. In this process, surface oxides are electrolessly reduced back to the metallic state by a highly reducing vanadous ion solution that is noncorrosive to most metals and is regenerated electrochemically. The electroless reduction and redox regeneration cycles form a closed loop such that oxygen gas is the only effluent. Wetting time and surface analysis data show that a ten-second exposure to the vanadous ROSA solution completely reduces all tinlead oxides that would normally be encountered on production components. The ROSA treatment has a wide operating window, provides soldering performance comparable to that attainable with a fully-activated rosin flux, and offers the promise of providing low soldering defect rates without the use ofCFC solvents. 36

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Current Trends and Future Issues in Solderability

Ewell

1998

Microelectronic Interconnections and Assembly

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Reduction of metallic surface oxides via an electrochemically-generated redox species

Cited by 6 publications

References 6 publications

Fluxless Wave Soldering

Fluxless Wave Soldering

A new reduced-oxide soldering activation method

Current Trends and Future Issues in Solderability

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