Copper alloy containing cobalt, nickel and silicon

US8430979B2 · kind B2 · utility

Assignee

• GBC Metals, LLC · US

Inventors

• Frank N. Mandigo · Northford, US
• Peter W. Robinson · Branford, US
• Derek E. Tyler · Cheshire, US
• Andreas Boegel · Weißenhorn, DE
• Hans-Achim Kuhn · Illertissen, DE
• Frank M. Keppeler · Neu-Ulm, DE
• Joerg Seeger · Ulm, DE

Key dates

• Filing date: Oct 26, 2006
• Grant date: Apr 30, 2013
• Expiry date: Oct 23, 2028

Classification

• Technology area (CPC H): Electricity
• CPC primary: H01L2924/0002
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

A copper alloy having an improved combination of yield strength and electrical conductivity contains, by weight, from 1% to 2.5% of nickel, from 0.5% to 2.0% of cobalt, with a total nickel plus cobalt content of from 1.7% to 4.3%, from 0.5% to 1.5% of silicon with a ratio of (Ni+Co)/Si of between 3.5 and 6, and the balance copper and inevitable impurities wherein the wrought copper alloy has an electrical conductivity in excess of 40% IACS. A further increase in the combination of yield strength and electrical conductivity as well as enhanced resistance to stress relaxation is obtained by a further inclusion of up to 1% of silver.