Copper alloy and method of producing same

A copper alloy consisting of from 0.8 mass % to 1.8 mass % of Co, from 0.16 mass % to 0.6 mass % of Si, and the balance of Cu and unavoidable impurities, wherein

• a mass ratio of Co to Si (Co/Si) is between 3.0 and 5.0;
• a size of inclusions to be precipitated in the copper alloy is 2 μm or less;
• and
• a total volume of the inclusions having a size of between 0.05 μm and 2 μm in the copper alloy is from 0.3 vol % to 0.5 vol %.

A copper alloy consisting of from 0.8 mass % to 1.8 mass % of Co, from 0.16 mass % to 0.6 mass % of Si, from 0.1 mass % to 1.0 mass % of Zn and the balance of Cu and unavoidable impurities, wherein

• a mass ratio of Co to Si(Co/Si) is between 3.0 and 5.0;
• a size of inclusions to be precipitated in the copper alloy is 2 μm or less;
• and
• a total volume of the inclusions having a size of between 0.05 μm and 2 μm in the copper alloy is from 0.3 vol % to 0.5 vol %.

A copper alloy comprising from 0.8 mass % to 1.8 mass % of Co, from 0.16 mass % to 0.6 mass % of Si, and the balance of Cu and unavoidable impurities, wherein

• a mass ratio of Co to Si(Co/Si) is between 3.0 and 5.0;
• a size of inclusions to be precipitated in the copper alloy is 2 μm or less;
• and
• a total volume of the inclusions having a size of between 0.05 μm and 2 μm in the copper alloy is from 0.3 vol % to 0.5 vol %;
• and
• having a conductivity of 60% IACS or more and a tensile strength of 700 N/mm2 or more.