Platinum electrolyte for use in electrolytic plating
AssigneeHoneywell International Inc.
InventorsThomas E. Strangman, Derek Raybould, Alex Kozlov
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Abstract
An electrolyte for use in electrolytic platinum platinum plating that results in reduced Cl, S, or P contaminant production. The bath comprises 0.01 to 320 g/lit of platinum in the form of the platinum salt dinitrodiammine platinum, Pt(NH3)2(NO2)2 or variants thereof and 0.1 to 240 g/lit of alkali metal carbonate M2CO3 or bicarbonate MHCO3 where M is selected from a group comprising lithium (Li), sodium (Na), potassium (K), rubidium (Rb) and cesium (Cs).
Claims18
An electrolyte for use in electrolytic plating of platinum comprising 0.01 to 320 g/lit of platinum salt and 0.1 to 240 g/lit of a carbonate, said electrolyte being substantially free of chlorine, sulphur, phosphorous and compounds thereof.
An electrolyte for use in electrolytic plating of platinum comprising 10 g/lit of platinum salt and 100 g/lit of sodium carbonate, the electrolyte being substantially free of chlorine, sulphur, phosphorous, and compounds thereof.
In an electrolytic plating process, the improvement comprising using a bath comprising 0.01 to 320 g/lit of platinum salt and 0.1 to 240 g/lit of a carbonate, the bath being substantially free of chlorine, sulphur, phosphorous and compounds thereof.
Dependencies are inferred from the claim text.