Patent ID: 9499885
Filing Date: 2016-11-22
CPC Classification: C22C,C22F,H01B

Claim Text:
1. A copper alloy for electronic materials, the copper alloy consisting of: 0.5% to 4.0% by mass of Co and 0.1% to 1.2% by mass of Si, optionally at least one alloying element selected from the group consisting of Cr, Sn, P, Mg, Mn, Ag, As, Sb, Be, B, Ti, Zr, Al, and Fe, the total amount of said alloying elements being 2.0% by mass or less, the balance of the copper alloy being Cu and unavoidable impurities, wherein the mass % ratio of Co and Si (Co/Si) is 3.5 ≦Co/Si ≦5.5, an area ratio of discontinuous precipitation (DP) cells is 5% or less, and an average value of a maximum width of discontinuous precipitation (DP) cells is 2 μm or less.