Occidental Chemical Corporation

Yvonne Rymwid

Kenneth D Baker

Mohamed F El-Shazly

Improved baths for the electrodeposition of ruthenium metal on various substrates. The ruthenium metal baths are formulated with a complex of ruthenium metal and sulphamic acid wherein the molar ratio is one mole of ruthenium metal and from about 4 to 10 moles of sulphamic acid. For most purposes, certain selective metals are also present in the baths, which are maintained at a pH ranging from about 1.0 to 2.2. The process for utilizing said baths to plate substrates with essentially pure ruthenium metal is also described and claimed.

Bath and process for the electrodeposition of ruthenium

An electroless plating process for depositing gold on substrates, such as metal and metallized substrates, which involves immersing the substrates in an electroless plating bath composed of a trivalent gold complex, an organic carboxylic acid, and/or a mineral acid sufficient in amount so that the pH of the bath will range from about 0.1 to 6.0. The process of utilizing said electroless bath to deposit gold on the aforementioned substrates is also disclosed and claimed.

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West Paterson, NJ, United States of America

Yvonne Rymwid