System for laser-welding components of an implantable device

Details System for laser-welding components of an implantable device System for laser-welding components of an implantable device

1996-02-22

1999-03-02

Evans, Geoffrey S.

Electric heating

Metal heating

By arc

439866, B23K 2600

Patent

active

058774726

ABSTRACT:
Particularly applicable to implantable stimulation devices, a system is provided for laser-welding an electrically conductive elongate member, typically a lead, or elongate member, interconnecting operating components of a stimulation device. A bore is formed in a termination component for the slidable reception of the elongate member. Also formed in the termination component is an aperture in communication with the bore and having an axis which extends in a direction transverse that of the axis of the bore. The elongate member is positioned so it extends through the bore in the termination component and is thereby coplanar with and intersects the axis of the aperture. Thereupon, a laser beam, which may be from a pulse laser, is directed transversely of the elongate member through the aperture in the termination component and onto the elongate member to simultaneously melt the elongate member and the termination component in the region of the aperture and create a homogeneous mix of the molten material of both the elongate member and the termination component within the aperture. Then, operation of the laser beam is discontinued to allow solidification of the homogeneous mix of the molten material within the aperture to thereby achieve a welded connection between the elongate member and the termination component. The aperture in the termination component must be large enough to allow the laser beam to pass therethrough yet small enough to allow the melt of the rim of the aperture and the elongate member simultaneously.

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