Multi-layered radiopaque coating on intravascular devices
First Claim
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1. An intravascular device comprising:
- a substrate surface;
a layer of a radiopaque material on the substrate surface and having a thickness sufficient to permit visualization;
a capping layer positioned on the layer of radiopaque material to prevent exposure of the layer of radiopaque material to surrounding tissue; and
at least one adhesion layer disposed between the radiopaque material and the substrate surface, wherein a first part of the adhesion layer adjacent to the substrate surface has a different composition than a combination of the radiopaque material and a material in the substrate surface and wherein a second part of the adhesion layer adjacent to the layer of radiopaque material has a combination of the material used for the first part of the adhesion layer and the radiopaque material.
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Abstract
Intravascular devices having a radiopaque layer thereon for visualization are provided. The devices further includes a capping layer on the radiopaque layer to prevent exposure of the radiopaque material to surrounding tissues. A method of coating the device is also provided. The method includes using an unbalanced magnetic field magnetron to generate, from a source, metal atoms for coating and bombarding ions for compressing deposited metal atoms to the surface of the device.
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Citations
24 Claims
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1. An intravascular device comprising:
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a substrate surface; a layer of a radiopaque material on the substrate surface and having a thickness sufficient to permit visualization; a capping layer positioned on the layer of radiopaque material to prevent exposure of the layer of radiopaque material to surrounding tissue; and at least one adhesion layer disposed between the radiopaque material and the substrate surface, wherein a first part of the adhesion layer adjacent to the substrate surface has a different composition than a combination of the radiopaque material and a material in the substrate surface and wherein a second part of the adhesion layer adjacent to the layer of radiopaque material has a combination of the material used for the first part of the adhesion layer and the radiopaque material. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. An intravascular stent comprising:
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a flexible expandable body having a surface; a layer of a radiopaque material on the surface and having a thickness sufficient to permit visualization; an adhesion layer between the layer of radiopaque material and the surface to enhance bonding between the layer of radiopaque material and the surface; and a capping layer positioned on the layer of radiopaque material to prevent exposure of the layer of radiopaque material to surrounding tissue, wherein a first part of the adhesion layer adjacent to the flexible expandable body has a different composition than a combination of the radiopaque material and a material in the flexible expandable body and wherein a second part of the adhesion layer adjacent to the layer of radiopaque material has a combination of the material used for the first part of the adhesion layer and the radiopaque material. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24)
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Specification