Encapsulated Electronics In An Eye-Mountable Device
First Claim
1. An eye-mountable device comprising:
- a transparent polymeric material having a concave surface and a convex surface, wherein the concave surface is configured to be removably mounted over a corneal surface and the convex surface is configured to be compatible with eyelid motion when the concave surface is so mounted; and
a substrate at least partially embedded in the transparent polymeric material, wherein the substrate comprises a first layer of a bio-compatible material, a second layer of the bio-compatible material, an electrochemical sensor that includes a working electrode and a reference electrode and an electronics module, wherein portions of the first and second layers of the bio-compatible material are annealed together such that the electronics module is encapsulated within the bio-compatible material, wherein the second layer has an opening that exposes the working electrode and reference electrode, and wherein the electronics module includes;
an antenna; and
a controller electrically connected to the electrochemical sensor and the antenna, wherein the controller is configured to control the electrochemical sensor to obtain a sensor measurement related to a concentration of an analyte in a fluid to which the eye-mountable device is exposed and use the antenna to indicate the sensor measurement.
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Accused Products
Abstract
An eye-mountable device includes an electrochemical sensor embedded in a polymeric material configured for mounting to a surface of an eye. The electrochemical sensor includes a working electrode and a reference electrode that reacts with an analyte to generate a sensor measurement related to a concentration of the analyte in a fluid to which the eye-mountable device is exposed. An example assembly process includes: forming a sacrificial layer on a working substrate; forming a first layer of a bio-compatible material on the sacrificial layer; providing an electronics module on the first layer of the bio-compatible material, forming a second layer of the bio-compatible material to cover the electronics module; and annealing the first and second layers of the bio-compatible material together to form an encapsulated structure having the electronics module fully encapsulated by the bio-compatible material.
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Citations
20 Claims
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1. An eye-mountable device comprising:
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a transparent polymeric material having a concave surface and a convex surface, wherein the concave surface is configured to be removably mounted over a corneal surface and the convex surface is configured to be compatible with eyelid motion when the concave surface is so mounted; and a substrate at least partially embedded in the transparent polymeric material, wherein the substrate comprises a first layer of a bio-compatible material, a second layer of the bio-compatible material, an electrochemical sensor that includes a working electrode and a reference electrode and an electronics module, wherein portions of the first and second layers of the bio-compatible material are annealed together such that the electronics module is encapsulated within the bio-compatible material, wherein the second layer has an opening that exposes the working electrode and reference electrode, and wherein the electronics module includes; an antenna; and a controller electrically connected to the electrochemical sensor and the antenna, wherein the controller is configured to control the electrochemical sensor to obtain a sensor measurement related to a concentration of an analyte in a fluid to which the eye-mountable device is exposed and use the antenna to indicate the sensor measurement. - View Dependent Claims (3, 4, 5, 6)
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2. (canceled)
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7. A method comprising:
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forming a first layer of a bio-compatible material; providing an electronics module on the first layer of the bio-compatible material; forming a working electrode and a reference electrode of an electrochemical sensor on the first layer of the bio-compatible material; forming a second layer of the bio-compatible material to cover the electronics module, the working electrode, and the reference electrode; and annealing portions of the first and second layers of the bio-compatible material together to form an encapsulated structure, wherein the encapsulated structure comprises the electronics module fully enclosed within the bio-compatible material; and after the annealing, forming an opening in the second layer of the bio-compatible material to expose the working electrode and reference electrode. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A device prepared by a process comprising:
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forming a first layer of a bio-compatible material; providing an electronics module on the first layer of the bio-compatible material; forming a working electrode and a reference electrode of an electrochemical sensor on the first layer of the bio-compatible material; forming a second layer of the bio-compatible material to cover the electronics module, the working electrode, and the reference electrode; and annealing portions of the first and second layers of the bio-compatible material together to form an encapsulated structure, wherein the encapsulated structure comprises the electronics module fully enclosed within the bio-compatible material; and after the annealing, forming an opening in the second layer of the bio-compatible material to expose the working electrode and reference electrode. - View Dependent Claims (19, 20)
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Specification