Cable, cable connection method and cable welder

A cable having a configuration in which an end of the conductor of a cable is connected to the connecting face of a contact of a connector or substrate such that the lengthwise direction of said connecting face and the lengthwise direction of said conductor are mutually matched in the connection, said cable characterized in that

• a long elongated welded part is formed in the lengthwise direction of said conductor in the connecting part between said conductor and said contact, and the state of the welding in said welded part is within the scope from the condition in which the depth at the top of a color changed part forming an arc on said contact is above 0.1 mm to the condition immediately prior to the condition of blasting of said contact.

A cable having a configuration wherein an end of the conductor of a cable is connected to the connecting face of a contact of a connector or substrate such that the lengthwise direction of said connecting face and the lengthwise direction of said conductor are mutually matched in the connection, said cable characterized in that

• a long elongated welded part is formed in the lengthwise direction of said conductor in the connecting part between said conductor and said contact, and
• the state of the welding in said welded part is within the scope from the condition in which the dispersion of a layer of precious metal thinly covering the surface of said conductor of said cable forms an alloy layer of that precious metal in said contact that is of a depth of 5 μm to the condition in which said alloy layer is half the thickness of said contact.