Chiang Mai Journal of Science

Influence of Bath Formulations on Low-Temperature Electroless Deposition of Ni-P Alloys

Paper Type	Contributed Paper
Title	Influence of Bath Formulations on Low-Temperature Electroless Deposition of Ni-P Alloys
Author	Chulaluk Somphotch , Ekasit Nisarattanaporna, Yuttanant Boonyongmaneeratb,*
Email	yuttanant.b@chula.ac.th
Abstract:  The influence of the concentrations of a metal source, a reducing agent, and hydrogen ions on the electroless deposition of Ni-P alloys is investigated at a relatively low deposition temperature of 65oC.  Hypophosphite and pH are determined to be the main controllers of the deposition rate.  Decent bath stability and a fair deposition rate of ~20 μm/hr, comparable to that obtained under the typical deposition temperature of ~85oC, are achievable by maintaining the nickel sulfate/sodium hypophosphite concentration ratio at ~0.4.  A moderately high sodium hypophosphite concentration of 0.38 M and a high pH of 9 and above are required. The empirical kinetics equations of the electroless nickel deposition are discussed and developed.
Start & End Page	1332 - 1340
Received Date	2013-04-04
Revised Date
Accepted Date	2013-07-26
Full Text	Download
Keyword	Electroless plating, nickel-phosphorus alloys, bath formulation, deposition characteristic
Volume	Vol.41 No.5/2 (OCTOBER 2014)
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