Encapsulated electronics
First Claim
1. An eye-mountable device comprising:
- a transparent polymeric material having a concave surface and a convex surface, whereinthe 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
an encapsulated electronics structure at least partially embedded in the transparent polymeric material, wherein the encapsulated electronics structure 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-compatiblematerial are annealed together such that the electronics module is encapsulated within the biocompatible 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.
213 Citations
19 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 an encapsulated electronics structure at least partially embedded in the transparent polymeric material, wherein the encapsulated electronics structure 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 biocompatible 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 (2, 3, 4, 5)
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6. 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 (7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. 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 (18, 19)
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Specification