Stable, electroless, aqueous, acidic gold bath for depositing gold and the use thereof

US5322552A · kind A · utility

Assignee

• SCHERING CORPORATION · US

Inventors

• Manfred Dettke · Berlin, DE
• Robert Ruether · Oranienburg, DE
• Klaus Janotta · Berlin, DE

Key dates

• Filing date: Apr 2, 1993
• Grant date: Jun 21, 1994
• Expiry date: Apr 2, 2013

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C23C18/42
• WIPO field: Surface technology, coating
• WIPO sector: Chemistry

Abstract

Stable, electroless, aqueous acidic gold bath, containing the tetracyano-(III) anion, a complexing agent, or a mixture of several complexing agents, and an acid, or a mixture of acids, and the use of these baths for the deposition of gold on metals which are less noble than gold or on alloys of these metals.