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US 2016/0111178 A1Published application
Composite filar for implantable medical device
AssigneeMedtronic, Inc.
InventorsPeter B. McIntyre, Jacob L. Popp
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Abstract
A composite filar has a conductive core, an outer fatigue-resistant metallic layer and a diffusion barrier between the core and the fatigue-resistant layer to prevent intermetallic diffusion between the core and the fatigue-resistant layer.
Claims20
A composite filar for use in an implantable medical device, the filar comprising:
- a metallic core having a resistivity of less than 25 micro-ohm-cm;
- a metallic diffusion barrier disposed about and in contact with the core;
- and
- a fatigue-resistant metallic layer disposed about and in contact with the diffusion barrier,
- wherein the diffusion barrier prevents intermetallic diffusion between the core and the fatigue-resistant layer.
2 more elements
An implantable medical lead according to claim 19, wherein the filar is coiled about a longitudinal axis of the lead.
A composite filar for use in an implantable medical device, the filar comprising:
- a core comprising silver;
- a diffusion barrier disposed about and in contact with the core, the diffusion barrier comprising an alloy comprising 33% to 37% by weight nickel, 31.5% to 39% by weight cobalt, 9% to 10.5% by weight molybdenum, and 19% to 21% by weight chromium;
- and
- a metallic layer comprising a titanium-molybdenum alloy disposed about and in contact with the diffusion barrier.
1 more element
Dependencies are inferred from the claim text.