Heat dissipation and copper alloy sheet excellent in repetitive bending property

摘要

PROBLEM TO BE SOLVED: To provide a copper alloy sheet used as a heat dissipation plate of LED, having excellent heat dissipation, electric conductivity, repeated bendability and shape retainment characteristic.;SOLUTION: Provided is a copper alloy sheet that contains Ag by 0 to 1.0 weight %, Ti by 0 to 0.08 weight %, Ni by 0 to 2.0 weight %, Zn by 0 to 3.5 weight %, and one or more selected from the group of Cr, Fe, In, P, Si, Sn and Zr by 0 to 0.5 weight % in total, and the remainder is composed of Cu and unavoidable impurities, and assuming the rotation angle around axis of a direction perpendicular to the plane containing [001] orientation of crystal and an ND direction of material to be Φ, the rotation angle around the ND direction as axis to be φ1, and the rotation angel around [001] orientation as axis to be φ2 and rotating by φ1 around an ND axis as rotation axis, followed by rotating by Φ in order for the ND axis and z axis to coincide, and finally rotating by φ2 around a [001] axis, then the ratio of the pole density of crystal orientation in Euler angle (0, 0, 0) to the pole density of crystal orientation in Euler angle (40, 45, 0), that is, (0, 0, 0) pole density/(40, 45, 0) pole density, is 0.2 or more.;COPYRIGHT: (C)2014,JPO&INPIT