Micro-Miniature Implantable Coated Device

• US 20080051862A1
• Filed: 10/25/2007
• Published: 02/28/2008
• Est. Priority Date: 02/01/2005
• Status: Active Grant

• Current Assignee: Cortigent Incorporated
• Original Assignee: Second Sight Medical Products, Inc.
• Inventors: Greenberg, Robert, Mech, Brian, Jiang, Honggang
• Granted Patent: US 9,492,670 B2
• Time in Patent Office: Days
• US Class Current: 607/116
• CPC Class Codes: A61N 1/05 for implantation or insertion into the body, e.g. heart electrode A61N1/06 takes precedence
• CPC Class Codes: A61N 1/372 Arrangements in connection with the implantation of stimulators
• CPC Class Codes: A61N 1/37205 Microstimulators, e.g. implantable through a cannula
• CPC Class Codes: A61N 1/375 Constructional arrangements, e.g. casings
• CPC Class Codes: C23C 14/081 of aluminium, magnesium or beryllium
• CPC Class Codes: C23C 14/28 by wave energy or particle radiation C23C14/32 - C23C14/48 take precedence

Abstract

An implantable micro-miniature device is disclosed. The device comprises a thin hermetic insulating coating and at least one thin polymer or metal secondary coating over the hermetic insulating layer in order to protect the insulating layer from the erosive action of body fluids or the like. In one embodiment the insulating layer is ion beam assisted deposited (IBAD) alumina and the secondary coating is a parylene polymer. The device may be a small electronic device such as a silicon integrated circuit chip. The thickness of the insulating layer may be ten microns or less and the thickness of the secondary layer may be between about 0.1 and about 15 microns.

Claims

1. A micro-miniature implantable device, comprising:

a device for use within a living organism, said device comprising an active electronic circuit;

a biocompatible inorganic hermetic insulating layer covering said device; and

a biocompatible protective metal layer overlying said insulating layer.

2. The micro-miniature device of claim 1, wherein said metal layer comprises titanium, platinum, iridium or mixtures thereof.

3. The micro-miniature device of claim 1, wherein said metal layer comprises titanium.

4. The micro-miniature device of claim 1, wherein said metal layer is between about 0.01 and about 10 microns thick.

5. The micro-miniature device of claim 1, wherein said metal layer is between about 0.02 and about 8 microns thick.

6. The micro-miniature device of claim 1, wherein said metal layer is between about 0.03 and about 6 microns thick.

7. The micro-miniature implantable device of claim 1 further comprising at least one biocompatible protective layer overlying said biocompatible metal layer.

8. A method of making a micro-miniature implantable device, comprising:

providing a micro-miniature device;

coating a least a major portion of said device with a thin insulating hermetic layer; and

coating said insulating layer with a polymer and/or metal layer.

9. The method of making a micro-miniature implantable device of claim 8 wherein at least a major portion of said device is coated with a thin insulating hermetic layer by IBAD.

10. The method of making a micro-miniature implantable device of claim 8 wherein at least a major portion of said device is coated with a thin insulating hermetic layer by microwave enhanced chemical vapor deposition.

11. The method of making a micro-miniature implantable device of claim 8 wherein said insulating layer is coated with a polymer by CVD or spin coating.

12. The method of making a micro-miniature implantable device of claim 8 wherein said insulating layer is coated with a metal layer by IBAD.

13. The method of making a micro-miniature implantable device of claim 8 using for manufacturing implantable nerve stimulators including visual prostheses, cochlear prostheses, deep brain stimulators, spinal chord stimulators, or functional electrical stimulators for motor control.