Ultrasonic wave-driven triboelectric generator with self-gap formed using plasma etching

Patent metadata

Field	Value
Publication number	US-12323076-B2
Application number	US-202217974640-A
Country	US
Kind code	B2
Filing date	Oct 27, 2022
Priority date	Oct 29, 2021
Publication date	Jun 3, 2025
Grant date	Jun 3, 2025

Abstract

The present invention relates to an ultrasonic wave-driven triboelectric generator in which a self-gap is formed using plasma etching. The present invention relates to an ultrasonic wave-driven triboelectric generator having a polymer film as one triboelectric layer having a self-gap defined therein using plasma etching such that a surface area thereof is increased to achieve high power and miniaturization of the generator.

First claim

What is claimed is:

1. An ultrasonic wave-driven triboelectric generator having a self-gap formed by plasma etching, the ultrasonic wave-driven triboelectric generator comprising:
a first triboelectric layer made of a conductive material and serving as a first electrode;
a second triboelectric layer disposed to face a frictional face of the first triboelectric layer, wherein the second triboelectric layer has a frictional face treated by plasma etching; and
a package made of titanium and surrounding at least a portion of the first triboelectric layer and the second triboelectric layer,
wherein the frictional face of the second triboelectric layer is plasma-etched to have a surface roughness such that there is a predefined gap between the first and second triboelectric layers, and
wherein when an ultrasonic wave is applied to the generator, the first triboelectric layer and the second triboelectric layer repeatedly contact each other and separate from each other to generate triboelectric energy.

2. The ultrasonic wave-driven triboelectric generator of claim 1 , wherein the first triboelectric layer and the second triboelectric layer are spaced apart from each other, and
wherein the frictional face of the second triboelectric layer comprises a sawtooth shape that repeats at regular intervals.

3. The ultrasonic wave-driven triboelectric generator of claim 1 , wherein the second triboelectric layer is made of a polymer material.

4. The ultrasonic wave-driven triboelectric generator of claim 1 , wherein the generator further comprises a second electrode on a face opposite to the frictional face of the second triboelectric layer.

5. An ultrasonic wave-driven triboelectric generator having a self-gap formed by plasma etching, the ultrasonic wave-driven triboelectric generator comprising:
a first triboelectric layer having a frictional face;
a first electrode disposed on a face opposite to the frictional face of the first triboelectric layer;
a second triboelectric layer disposed to face the frictional face of the first triboelectric layer, wherein the second triboelectric layer has a frictional face treated by plasma etching; and
a package made of titanium and surrounding at least a portion of the first triboelectric layer and the second triboelectric layer,
wherein the frictional face of the second triboelectric layer is plasma-etched to have a surface roughness such that there is a predefined gap between the first and second triboelectric layers, and
wherein when an ultrasonic wave is applied to the generator, the first triboelectric layer and the second triboelectric layer repeatedly contact each other and separate from each other to generate triboelectric energy.

6. The ultrasonic wave-driven triboelectric generator of claim 5 , wherein the first triboelectric layer and the second triboelectric layer are spaced apart from each other, and
wherein the frictional face of the second triboelectric layer comprises a sawtooth shape that repeats at regular intervals.

7. The ultrasonic wave-driven triboelectric generator of claim 5 , wherein the second triboelectric layer is made of a polymer material.

8. The ultrasonic wave-driven triboelectric generator of claim 5 , wherein the generator further comprises a second electrode on a face opposite to the frictional face of the second triboelectric layer.

9. A therapeutic device insertable into a human body and comprising an ultrasonic wave-driven triboelectric generator having a self-gap formed by plasma etching, the ultrasonic wave-driven triboelectric generator comprising:
a first triboelectric layer made of a conductive material and serving as a first electrode;
a second triboelectric layer disposed to face a frictional face of the first triboelectric layer, wherein the second triboelectric layer has a frictional face treated by plasma etching; and
a package made of titanium and surrounding at least a portion of the first triboelectric layer and the second triboelectric layer,
wherein the frictional face of the second triboelectric layer is plasma-etched to have a surface roughness such that there is a predefined gap between the first and second triboelectric layers, and
wherein when an ultrasonic wave is applied to the generator, the first triboelectric layer and the second triboelectric layer repeatedly contact and separate from each other to generate triboelectric energy.

10. A therapeutic device insertable into a human body, wherein the therapeutic device comprises the ultrasonic wave-driven triboelectric generator of claim 5 .

11. The therapeutic device of claim 9 , wherein when the ultrasonic wave is applied to the device inserted into the human body, the ultrasonic wave-driven triboelectric generator is configured to generate electric power.

12. The therapeutic device of claim 10 , wherein when the ultrasonic wave is applied to the device inserted into the human body, the ultrasonic wave-driven triboelectric generator is configured to generate electric power.

Assignees

• Research & Business Found Sungkyunkwan Univ

Inventors

• Kim Sangwoo
• Kim Young Jun
• Chung Young Wook
• Hwang Joon Ha

Classifications

• A61N1/3605 Primary

  Implantable neurostimulators for stimulating central or peripheral nerve system · CPC title

• A61N1/378

  Electrical supply · CPC title

• A61N2007/0021

  Neural system treatment · CPC title

• A61N1/0556

  Cuff electrodes · CPC title

• A61N1/3787

  from an external energy source · CPC title