Biocompatible bonding method and electronics package suitable for implantation
First Claim
1. A device comprising:
- a substrate at least a portion of which is electrically conductive;
a flexible assembly; and
at least one deposited rivet that bonds said substrate and said flexible assembly together.
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Accused Products
Abstract
The invention is directed to a method of bonding a hermetically sealed electronics package to an electrode or a flexible circuit and the resulting electronics package, that is suitable for implantation in living tissue, such as for a retinal or cortical electrode array to enable restoration of sight to certain non-sighted individuals. The hermetically sealed electronics package is directly bonded to the flex circuit or electrode by electroplating a biocompatible material, such as platinum or gold, effectively forming a plated rivet-shaped connection, which bonds the flex circuit to the electronics package. The resulting electronic device is biocompatible and is suitable for long-term implantation in living tissue.
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Citations
49 Claims
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1. A device comprising:
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a substrate at least a portion of which is electrically conductive;
a flexible assembly; and
at least one deposited rivet that bonds said substrate and said flexible assembly together. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. An implantable device comprising:
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a substrate containing at least one electrically conductive feedthrough attached to an electrically conductive routing on at least one side of said substrate;
a flexible assembly comprised of a first flexible electrically insulating substrate, a second flexible electrically insulating substrate, and at least one bond pad between said first and said second flexible electrically insulating substrates;
said first flexible electrically insulating substrate defining at least one hole that passes through said first flexible electrically insulating substrate, wherein said hole is aligned with said routing;
said second flexible electrically insulating substrate defining at least one hole that passes through said first flexible electrically insulating substrate, wherein said hole is aligned with said routing;
said at least one bond pad defining a hole therethrough, wherein said hole is aligned with said routing; and
wherein said substrate and said flexible assembly are bonded together with a deposited rivet. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29)
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30. A method of bonding for implantation a substrate to a flexible assembly, said method comprising the steps of:
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aligning said substrate and said flexible assembly, whereby there is a common alignment for a routing on said substrate and a through hole defined by said flexible assembly; and
depositing an electrically conductive rivet in said through hole, thereby bonding said flexible assembly to said substrate. - View Dependent Claims (31, 32)
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33. A device comprising:
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a electrically conductive article; and
a platinum layer electrochemically deposited on said electrically conductive article wherein said layer has a thickness greater than 5 microns and a Vickers hardness greater than 10. - View Dependent Claims (34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44)
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45. A method of making a device comprising the steps of:
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providing a substrate at least a portion of which is electrically conductive; and
electrochemically depositing a layer of platinum greater than one micron thick, with a Vickers hardness greater than ten, on said electrically conductive portion. - View Dependent Claims (46, 47, 48)
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49. A method of electrochemically depositing a platinum layer, comprising the steps of:
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providing a substrate;
electroplating the surface of a conductive substrate at a rate such that the particles of platinum form on the conductive substrate faster than necessary to form shiny platinum and slower than necessary to form platinum gray;
aligning an anode and a cathode;
immersing said anode and cathode in an electrochemical bath; and
plating said platinum layer.
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Specification