Patent ID: 6789723
Filing Date: 2004-09-14
Classification: B23K

Abstract:
A process for welding a Ti material and a Cu material comprising:interposing a welding Cu material, including a tertiary metal as a component, between a Ti material and a Cu material; said tertiary metal being of a type which: (i) reduces three-element eutectic temperature of the Ti, the Cu and said tertiary metal below a eutectic temperature of said Ti and the Cu; or (ii) results in the formation of a liquid phase at a temperature that is lower than a two-element eutectic temperature between the Ti material an the Cu material; heating said Ti material and the Cu material to a temperature wherein solid and liquid coexist and lower than a two-element eutectic temperature of the Ti material and the Cu material; and maintaining said temperature wherein solid and liquid coexist long enough to form a welding portion.