| 摘要 |
<p> Provided are: a copper alloy sheet having high strength, high electro-conductivity, high bending deflection coefficient and outstanding stress release characteristics; and high-current electronic components and heat-radiating electronic components using this copper alloy sheet. This copper steel sheet contains 0.01-0.50 mass% of a total of Zr and/or Ti, with the remainder being made up of copper and unavoidably impurities, has a tensile strength of 350MPa or more, and the A value determined according to the following formula is 0.5 or more. A = 2X(111)+X(220)-X(200) X(hkl)= I(hkl)/I0(hkl) (where I(hkl) and I0(hkl) are the diffraction integral strengths of the rolling plane obtained by X-ray diffraction and the (hkl) plane obtained with respect to the copper powder respectively.)</p> |
