Transducer and method for manufacturing same

• US 8,887,563 B2
• Filed: 09/20/2010
• Issued: 11/18/2014
• Est. Priority Date: 09/20/2010
• Status: Active Grant

• Current Assignee: Seoul National University R&DB Foundation (Seoul National University)
• Original Assignee: Seoul National University R&DB Foundation (Seoul National University)
• Inventors: Lee, Jung Hoon, Shin, Jae Ha, Choi, Jun Kyu
• Primary Examiner(s): Noori, Max
• Application Number:
  US13/825,045
• Publication Number:
  US 20130180344A1
• Time in Patent Office: 1,520 Days
• Field of Search: 738/27, 731/50.A, 736/24
• US Class Current: 73/150.A
• CPC Class Codes: G01L 1/04 by measuring elastic deformation of gauges, e.g. of springs
• CPC Class Codes: G01L 9/12 by making use of variations in capacitance , i.e. electric circuits therefor
• CPC Class Codes: G01N 27/4145 specially adapted for biomolecules, e.g. gate electrode with immobilised receptors
• CPC Class Codes: G01N 33/54373 involving physiochemical end-point determination, e.g. wave-guides, FETS, gratings
• CPC Class Codes: Y10T 29/435 Solid dielectric type

Abstract

The present invention relates to a transducer and a method for manufacturing same, and more particularly, to a transducer and to a method for manufacturing same, in which a first liquid and a second liquid are supplied such that, at the boundary therebetween, a deformation-generating part, including a perforated structure having one or more holes therein, is formed, and the effect of external pressure is negated by the action between the liquids.

Claims

1. A transducer which measures a force applied by an analyte being bonded to a surface thereof, comprising:

a chamber;

a deformation generating portion which classifies the chamber into a first area and a second area, is provided with a bonding layer to be bonded to the analyte at a surface that comes into contact with the first area, and has a perforated member shape including one or more holes that allow the first area and the second area to communicate with each other;

a deformation amount measuring member measuring a deformation amount of the deformation generating portion;

a first liquid which is provided in the first area and includes an analyte; and

a second liquid which is provided in the second area and forms an interface with the first liquid in the vicinity of the holes,

wherein elastic deformation is generated in the deformation generating portion when the analyte is bonded to the bonding layer.

2. The transducer according to claim 1, wherein the first liquid has hydrophilic properties and the second liquid has hydrophobic properties.

3. The transducer according to claim 1, wherein the second liquid is silicone oil.

4. The transducer according to claim 1, wherein the deformation generating portion is made of a Parylene material.

5. The transducer according to claim 1, wherein a surface of the deformation generating portion which comes into contact with the first area is surface-treated to be hydrophilic and a surface thereof which comes into contact with the second area is surface-treated to be hydrophobic.

6. The transducer according to claim 1, wherein the bonding layer is made of Au.

7. The transducer according to claim 1, wherein the deformation amount measuring member includes an upper electrode provided on a surface which comes into contact with the second area of the deformation generating portion and a lower electrode fixed inside the second area and provided to form capacitance with the upper electrode, and measures capacitance between the upper electrode and the lower electrode according to deformation of the deformation generating portion.

8. The transducer according to claim 1, wherein the deformation amount measuring member includes an optical sensor measuring a distance from the deformation generating portion and measures the distance between the optical sensor and the deformation generating portion according to deformation of the deformation generating portion.

9. A transducer which measures a force applied by an analyte being bonded to a surface thereof, comprising:

a chamber;

a substrate;

a deformation generating portion which classifies the chamber into a first area and a second area, is provided with a bonding layer to be bonded to the analyte at a surface that comes into contact with the first area, and has a perforated member shape including one or more holes that allow the first area and the second area to communicate with each other;

a deformation amount measuring member measuring a deformation amount of the deformation generating portion;

a first liquid which is provided in the first area and includes an analyte; and

a second liquid which is provided in the second area and forms an interface with the first liquid in the vicinity of the hole,

wherein elastic deformation is generated in the deformation generating portion when the analyte is boned to the bonding layer.

10. A method of manufacturing a transducer comprising:

depositing an insulating layer onto a substrate;

forming a lower electrode on an upper portion of the insulating layer;

forming a sacrificial layer which covers a part of the insulating layer and a part of the lower electrode;

forming an upper electrode to extend to an upper portion of the sacrificial layer and to be separated from the lower electrode;

forming a deformation generating portion to cover the sacrificial layer;

forming a bonding layer on an upper portion of the deformation generating portion;

forming a hole which causes the bonding layer, the deformation generating portion, and the upper electrode to simultaneously communicate with each other; and

removing the sacrificial layer.

11. The method according to claim 10, wherein the substrate is made of a silicone material having low resistance.

12. The method according to claim 10, wherein the lower electrode and the upper electrode are made of an Au material.

13. The method according to claim 10, further comprising:

filling an inside of the deformation generating portion from which the sacrificial layer is removed with silicone oil.

14. The method according to claim 10, wherein the deformation generating portion is made of a Parylene material.

15. A method of manufacturing a transducer comprising:

forming a lower electrode on an upper portion of a substrate;

forming a sacrificial layer which covers a part of the substrate and a part of the lower electrode;

forming an upper electrode to extend to an upper portion of the sacrificial layer and to be separated from the lower electrode;

forming a deformation generating portion to cover the sacrificial layer;

forming a hole which causes the deformation generating portion and the upper electrode to simultaneously communicate with each other; and

removing the sacrificial layer.

16. The method according to claim 15, wherein the substrate is made of a silicone material having low resistance.

17. The method according to claim 15, wherein the lower electrode and the upper electrode are made of an Au material.

18. The method according to claim 15, further comprising:

filling an inside of the deformation generating portion from which the sacrificial layer is removed with silicone oil.

19. The method according to claim 15, wherein the deformation generating portion is made of a Parylene material.

20. The method according to claim 15, wherein the substrate is surface-coated to have hydrophobic properties.