COPPER ALLOY SHEET HAVING EXCELLENT CONDUCTIVITY AND STRESS RELAXATION PROPERTIES

摘要

PROBLEM TO BE SOLVED: To provide a copper alloy sheet having all of high strength, high conductivity and excellent stress relaxation properties, a method for producing a copper alloy sheet, and an electronic component for large current and an electronic component for heat radiation prepared with the copper alloy sheet.;SOLUTION: A copper alloy sheet comprises Sn of 0.005-0.25 mass% with the balance being copper and inevitable impurities, and has 0.2% proof stress of 330 MPa or more and a thermal shrinkage of 50 ppm or less in rolling direction when heated at 200°C for 30 minutes.;SELECTED DRAWING: None;COPYRIGHT: (C)2017,JPO&INPIT