Coiled circuit bio-sensor

• US 20080009687A1
• Filed: 05/25/2007
• Published: 01/10/2008
• Est. Priority Date: 06/06/2003
• Status: Abandoned Application

• Current Assignee: Northrop Grumman Systems Corporation (Northrop Grumman Corporation)
• Original Assignee: Northrop Grumman Systems Corporation (Northrop Grumman Corporation)
• Inventors: Smith, Joseph, Howell, Robert, Kirby, Christopher, Freidhoff, Carl, Nathanson, Harvey
• Application Number:
  US11/802,806
• Publication Number:
  US 20080009687A1
• Time in Patent Office: Days
• US Class Current: 600/302
• CPC Class Codes: A61B 5/0002 Remote monitoring of patients using telemetry, e.g. transmission of vital signals via a communication network A61B5/07 takes precedence; transmission systems for measured values G08C; transmission H04B; transmission of digital information H04L; wireless communication networks H04W
• CPC Class Codes: A61B 5/14532 for measuring glucose, e.g. by tissue impedance measurement

Abstract

A coiled bio-medical device has a base layer coiled to form a plurality of concentric cylinders. The base layer comprises an inner surface. The coiled bio-medical includes a bio-sensor arranged on the inner surface of the base layer. The bio-sensor is adapted to collect bio-medical data from an organism. A transmitter is arranged on the inner surface of the base layer and is adapted to transmit the collected bio-medical data.

Claims

1. A coiled bio-medical device, comprising:

a base layer coiled to form a plurality of concentric cylinders, wherein the base layer comprises an inner surface;

a bio-sensor, wherein the bio-sensor is arranged on the inner surface of the coiled base layer and wherein the bio-sensor is adapted to collect bio-medical data from an organism; and

a transmitter, wherein the transmitter is arranged on the inner surface of the base layer and wherein the transmitter is adapted to transmit the collected bio-medical data.

2. The coiled biomedical device of claim 1, further comprising:

one or more of a thin film battery, processor, memory, receiver, micro-electronic mechanical system (MEMS), capacitive storage system, antenna and logic gates arranged on the inner surface of the layer.

3. The coiled bio-medical device of claim 1, wherein the bio-sensor and the transmitter are coiled.

4. The coiled medical device of claim 1, wherein the bio-sensor comprises one or more of a temperature sensor, strain sensor, pressure sensor, magnetic sensor, acceleration sensor, ionizing radiation sensor, acoustic wave sensor, chemical sensor, and photo-sensor.

5. The coiled medical device of claim 1, wherein the bio-medical data collected by the bio-sensor comprises temperature data, blood pressure data, blood flow data, intra-ocular pressure data, and glucose level data.

6. The coiled medical device of claim 1, wherein the layer comprises single crystal silicon.

7. The coiled medical device of claim 1, wherein the coiled medical device is implanted is implanted subcutaneously.

8. The coiled medical device of claim 1, further comprising:

a stressed coiling layer, wherein the stressed coiling layer having intrinsic stresses forming the plurality of concentric cylinders by the base layer.

9. The coiled bio-medical device of claim 1, wherein the stressed coiling layer comprises nitride.

10. The coiled biomedical device of claim 1, wherein the bio-sensor comprises thin complementary metal oxide semiconductor (CMOS) circuitry.

11. The coiled bio-medical device of claim 1, further comprising:

an antenna, wherein the antenna transmits the biomedical data collected by the bio-sensor.

12. The coiled biomedical device of claim 1, further comprising:

a antenna cap coupled to an end of the bio-medical device, wherein the antenna cap transmits the biomedical data collected by the bio-sensor.

13. The coiled biomedical device of claim 1, wherein the coiled bio-medical device is 1 μ

m to 1 cm in length.

14. The coiled biomedical device of claim 1, wherein the coiled bio-medical device comprises a coiled diameter ranging from 25 μ

m to 250 μ

m.

15. A method for fabricating a coiled bio-medical device, comprising:

depositing a silicon oxide layer on a silicon substrate;

depositing a device layer over the deposited silicon oxide layer;

forming active circuitry including a bio-sensor on the device layer;

depositing a stress inducing layer on the active circuitry including the bio-sensor;

releasing the device layer including the active circuitry deposited with the stress inducing layer by etching the silicon oxide layer from the silicon substrate; and

coiling the device layer having the active circuitry as the device layer is released from the silicon substrate forming the coiled bio-medical device, wherein internal stresses in the stress inducing layer cause the coiling as the device layer is released.

16. The method of claim 15, wherein the forming the active circuitry further comprising:

forming one or more of a thin film battery, processor, memory, receiver, micro-electronic mechanical system (MEMS), capacitive storage system, antenna and logic gates arranged on the inner surface of the layer.

17. The method of claim 15, wherein the forming the active circuitry including the bio-sensor further comprising:

forming one or more of a temperature sensor, strain sensor, pressure sensor, magnetic sensor, acceleration sensor, ionizing radiation sensor, acoustic wave sensor, chemical sensor, and photo-sensor.

18. The method of claim 15, wherein the stress inducing layer is deposited on the active circuitry formed by the implanted and activated positive and negative regions, the deposited gate polysilicon, and the formed spacers.

19. A coiled biomedical device, comprising:

a coiling layer including stressed silicon nitride;

a circuit device layer, wherein the circuit device layer comprises single crystal silicon; and

a bio-sensor fabricated on the single crystal silicon, wherein the bio-sensor comprises thin complementary metal oxide semiconductor (CMOS) circuitry, and the coiling layer is formed onto a surface of and coupled to the circuit device layer, the coiling layer having intrinsic stresses which cause coiling of the coiling layer and the circuit device layer when the circuit device layer is released from an underlying substrate.

20. The coiled biomedical device of claim 19, wherein the bio-sensor comprises:

one or more of a temperature sensor, strain sensor, pressure sensor, magnetic sensor, acceleration sensor, ionizing radiation sensor, acoustic wave sensor, chemical sensor, and photo-sensor.

21. The coiled bio-medical device of claim 19, wherein the bio-medical data collected by the bio-sensor comprises temperature data, blood pressure data, blood flow data, intra-ocular pressure data, and glucose level data.

22. The coiled bio-medical device of claim 19, further comprising:

a dipole antenna, wherein the dipole to transmit data collected by the bio-sensor.

23. The coiled bio-medical device of claim 19, wherein the coiled bio-medical device ranges from 100 μ

m to 150 μ

m in diameter.

24. The coiled bio-medical device of claim 19, wherein the coiled bio-medical device ranges from 1 μ

m to 1 cm in length.