Patent ID: 8348137

Claim:
A method of forming a connection to a microwire comprising a central conductor of a lower melting point metal in a sheath of a polymer of higher melting point, comprising the steps of: placing an elongated coil spring having first and second ends and made of a solderable material over a proximal end of the microwire, such that the proximal end of the microwire is juxtaposed to a first end of the coil spring; supplying molten solder to the proximal end of the microwire and the first end of the spring, the material of said solder being such as to be effectively bonded to the spring, polymer sheath, and metal conductor of the microwire after cooling, without affecting the polymer sheath of the microwire; allowing the solder to cool, such that the conductor of the microwire is soldered to the first end of the spring, with a cap of solder extending along a portion of the length of the first end of the spring, while the microwire extends out of the second end of the spring; and making an external connection to said cap of solder.