Technique for laser welding dissimilar metals

Details Technique for laser welding dissimilar metals Technique for laser welding dissimilar metals

1996-07-24

1998-12-01

Evans, Geoffrey S.

Electric heating

Metal heating

By arc

B23K 2600

Patent

active

058441980

ABSTRACT:
For an implantable medical devices, a system is provided for welding electrically conductive ribbon, typically stainless steel, to electrically conductive wire, typically platinum, the melting point of steel being substantially lower than that of platinum. An aperture is formed in the ribbon having an opening smaller than that of the wire. The ribbon is engaged with the wire such that the aperture is generally coextensive with the wire. Thereupon, a pulse laser beam is directed transversely of the ribbon through the aperture and onto the wire to simultaneously melt the wire and the ribbon and to create a homogeneous mix of the molten steel and platinum in the region surrounding the aperture. Thereafter, operation of the laser beam is discontinued to allow solidification and thereby achieve a welded connection between the ribbon and the wire.

REFERENCES:
patent: 5067903 (1991-11-01), Szyszkowski
patent: 5235742 (1993-08-01), Szyszkowski
patent: 5282841 (1994-02-01), Szyszkowski
patent: 5306891 (1994-04-01), Fleming et al.
patent: 5343014 (1994-08-01), Ogino et al.
patent: 5522872 (1996-06-01), Hoff

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