Copper alloy wire with plating on surface and manufacturing method thereof
A technology of copper alloy wire and manufacturing method, which is applied in the field of bonding wire, can solve the problems of poor aging resistance, high temperature and high humidity resistance, reliability needs to be improved, and insufficient oxidation resistance, so as to improve oxidation resistance, Improves oxidation resistance and sulfidation resistance, and enhances the effect of welding wire workability
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Embodiment 1
[0097]The copper alloy wire with coating on the surface of the present embodiment comprises a core wire and a coating coated on the outside of the core wire; the core wire contains 0.8% by weight of Ag, 500ppm of Ca, 400ppm of In, and the balance is copper; the coating It is a composite coating. The composite coating is composed of a palladium coating coated on the outside of the core wire and a gold coating coated on the outside of the palladium coating. The thickness of the palladium coating in the composite coating is 100 nm, and the thickness of the gold coating is 50 nm.
[0098] The above-mentioned manufacturing method of the copper alloy wire with plating layer on the surface comprises the following steps:
[0099] (1) Melting and casting: Adding Ag, Ca and In to the copper raw material in proportion, after vacuum melting and directional continuous casting process, a core wire with a diameter of 6 mm is obtained;
[0100] (2) Wire drawing: draw the wire obtained in step...
Embodiment 2
[0122] The copper alloy wire with a coating on the surface of this embodiment includes a core wire and a coating coated on the outside of the core wire; the core wire contains Ag 3%, Ca 150ppm, In 150ppm, Ge 300ppm by weight, and the balance is copper; The coating is a composite coating, and the composite coating is composed of a palladium coating coated on the outside of the core wire and a gold coating coated on the outside of the palladium coating. The thickness of the palladium coating in the composite coating is 200 nm, and the thickness of the gold coating is 10 nm.
[0123] The above-mentioned manufacturing method of the copper alloy wire with plating layer on the surface comprises the following steps:
[0124] (1) Melting and casting: Ag, Ca, In and Ge are added to the copper raw material in proportion, and after vacuum melting and directional continuous casting process, a core wire with a diameter of 8 mm is obtained;
[0125] (2) Wire drawing: drawing the wire obtain...
Embodiment 3
[0147] The copper alloy wire with coating on the surface of the present embodiment comprises a core wire and a palladium coating coated on the outside of the core wire; the core wire contains Ag 1.2%, Ca 200ppm, In 200ppm, Ge 300ppm by weight, and the balance is copper ; The thickness of the palladium coating is 300nm.
[0148]The above-mentioned manufacturing method of the copper alloy wire with plating layer on the surface comprises the following steps:
[0149] (1) Melting and casting: Ag, Ca, In and Ge are added to the copper raw material in proportion, and after vacuum melting and directional continuous casting process, a core wire with a diameter of 6 mm is obtained;
[0150] (2) Wire drawing: drawing the wire obtained in step (1) to obtain a core wire with a diameter of 200um;
[0151] (3) Intermediate annealing: After step (2) wire drawing is completed, intermediate annealing is performed on the core wire, and N is used during the annealing process. 2 As the annealin...
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