Patent ID: 7947133

Claim:
A copper alloy strip material for electrical/electronic equipment, comprising: a copper alloy containing 2.0 to 5.0 mass % Ni, 0.43 to 1.5 mass % Si, and a remaining component formed of Cu and an unavoidable impurity, wherein three types of intermetallic compounds A, B, and C comprising Ni and Si in a total amount of 50 mass % or more are contained, said intermetallic compound A having a compound diameter of 0.3 μm to 2 μm, said intermetallic compound B having a compound diameter of 0.05 μm to less than 0.3 μm, said intermetallic compound C having a compound diameter of more than 0.001 μm to less than 0.05 μm, a crystal grain of the copper alloy strip material has a sectional shape taken along a plane perpendicular to a rolling direction thereof, said sectional shape having a horizontal length X (μm) and a vertical length y (μm) so that an expression [x/y≧2] is satisfied, and said intermetallic compound A has a dispersion density a, said intermetallic compound B has a dispersion density b and said intermetallic compound C has a dispersion density c so that an expression [a/(b+c)≦0.010] and an expression [0.001≦(b/c)≦0.10] are satisfied.