Journal ArticleDOI
Mechanism of Stabilizer Acceleration in Electroless Nickel at Wirebond Substrates
TLDR
In this paper, the authors examined the mechanism of stabilizer concentration at electroless nickel wirebond electrodes and found that lead acetate completely inhibited the plating, and a bimodal distribution was observed as the concentration of thiourea/lead acetate was varied.Abstract:
This paper examines the mechanism of stabilizer concentration at electroless nickel wirebond electrodes. A one-step activation protocol was first achieved on copper substrates using acetic acid and dimethylamineborane. Thereafter nickel multilayers were grown onto the substrates using nickel sulfate heptahydrate as the source of nickel, sodium hypophosphite as the reducing agent, acetic acid as the complexing agent, and thiourea/lead acetate as the stabilizing agent. The morphology of the nickel layers and the effective concentration of the stabilizer were determined using quartz crystal microbalance, gravimetric techniques, and energy-dispersive X-ray analysis (EDX). The plating rate was obtained by measuring the thickness of the Ni-plated using X-ray fluorescence spectroscopy. It was found that lead acetate completely inhibited the plating, and a bimodal distribution was observed as the concentration of the thiourea was varied. We proposed a mechanism for the effect of stabilizer in electroless Ni baths. This mechanism was confirmed using Fourier Transform Infrared and EDX measurements. © 2003 The Electrochemical Society. All rights reserved.read more
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Journal ArticleDOI
Effect of accelerators and stabilizers on the formation and characteristics of electroless Ni–P deposits
TL;DR: In this paper, the effect of thiourea, succinic acid and lead acetate on the formation and characteristics of electroless Ni-P deposits obtained from an acidic hypophosphite reduced electroless nickel bath is addressed.
Journal ArticleDOI
β-NiS modified CdS nanowires for photocatalytic H2 evolution with exceptionally high efficiency.
TL;DR: In this paper, a hybrid photocatalysts consisting of β-NiS modified CdS nanowires (NiS/CdS NWs) have been synthesized via a simple and green hydrothermal route using NiS as the template from thiourea and nickel acetate in the presence of sodium hypophosphite.
Journal ArticleDOI
Yttria-Stabilized Zirconia (YSZ)-Based Hollow Fiber Solid Oxide Fuel Cells
Chiao Chien Wei,Kang Li +1 more
TL;DR: In this article, asymmetric YSZ hollow-fiber membranes have been prepared at relatively lower sintering temperatures and shorter Sintering durations using a combined phase inversion and sinting method, which have shown a high mechanical strength of 296.7 MPa and a gastight property.
Journal ArticleDOI
The physical and electrochemical properties of electroless deposited nickel–phosphorus black coatings
TL;DR: In this paper, the effect of co-deposited phosphorus and sulfur atoms on corrosion resistance of electroless nickel deposits was evaluated by electrochemical impedance spectroscopy (EIS).
Journal ArticleDOI
Role of Cu2+ as an Additive in an Electroless Nickel−Phosphorus Plating System: A Stabilizer or a Codeposit?
TL;DR: In this paper, the effect of cupric (Cu2+) ion as an additive in the acidic electroless nickel plating bath on the characteristics of the resulting nickel−phosphorus (Ni−P) alloys was investigated mainly with X-ray diffraction, scanning electron microscopy, and energy-dispersive X -ray (EDX) spectrometry.
References
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Verwendung von Schwingquarzen zur Wägung dünner Schichten und zur Mikrowägung
TL;DR: In this paper, eigenfrequenz der Platte infolge Vergroserung der schwingenden Masse is vermessen, so das eine empirische Eichung bei der Schichtwagung mit Schwingquarzen entfallt.
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Use of quartz vibration for weighing thin films on a microbalance
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The use of quarts oscillators for weighing thin layers and for microweighing
G. Sauerbrey,G.Z. Sauerbrey +1 more
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Electroless plating : fundamentals and applications
Glenn O. Mallory,Juan B. Hajdu +1 more
TL;DR: The Electroless Plating: Fundamentals and Applications (ESPA) as discussed by the authors is a comprehensive text that covers both fundamental and applied aspects of electroless deposition, and was first introduced at SUR/FIN '91.
Journal Article
Nickel plating on steel by chemical reduction
A. Brenner,G. E. Riddell +1 more
TL;DR: In this article, a process was developed for the production of adherent nickel deposits of good quality on steel without the use of an electric current, which was brought about by chemical reduction of a nickel salt with hypophosphites in a hot ammoniacal solution.
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