Electrode structure, fingerprint recognition module and manufacturing method thereof, display device

• US 10,540,534 B2
• Filed: 10/24/2016
• Issued: 01/21/2020
• Est. Priority Date: 10/29/2015
• Status: Active Grant

• Current Assignee: BOE Technology Group Co., Ltd.
• Original Assignee: BOE Technology Group Co., Ltd.
• Inventors: Li, Yingyi
• Primary Examiner(s): Seth, Manav
• Application Number:
  US15/524,074
• Publication Number:
  US 20170316245A1
• Time in Patent Office: 1,184 Days
• CPC Class Codes: C09J 11/04 inorganic
• CPC Class Codes: C09J 9/02 Electrically-conducting adhesives
• CPC Class Codes: G06V 40/1306 non-optical, e.g. ultrasonic or capacitive sensing
• CPC Class Codes: H01B 1/18 the conductive material comprising carbon-silicon compounds, carbon or silicon
• CPC Class Codes: H01B 1/24 the conductive material comprising carbon-silicon compounds, carbon or silicon
• CPC Class Codes: H01B 13/0036 Details

Abstract

Disclosed is an electrode structure including an electrode body, a composite layer disposed on the electrode body; a surface of the composite layer away from the electrode body being set to be a finger contact surface in a case of fingerprint recognition, wherein the composite layer is made from composite materials formed by a cured main body glue and one-dimensional nano-conductor materials distributed in the main body glue; and an end of each of the one-dimensional nano-conductor materials exposed from the finger contact surface of the composite layer, and the other of each of the one-dimensional nano-conductor materials makes contact with the electrode body. A fingerprint recognition module including the electrode structure and a manufacturing method thereof are also disclosed.

Claims

1. An electrode structure, comprising:

an electrode body, a composite layer disposed on the electrode body;

a surface of the composite layer away from the electrode body being set to be a finger contact surface in a case of fingerprint recognition, wherein

the composite layer is made from composite materials formed by a cured main body glue and one-dimensional nano-conductor materials distributed in the main body glue;

an end of each of the one-dimensional nano-conductor materials is exposed from the finger contact surface of the composite layer, and the other end of each of the one-dimensional nano-conductor materials makes contact with the electrode body; and

the axial direction of each of the one-dimensional nano-conductor materials is inclined relative to an upper surface of the electrode body, the axial direction of each of the one-dimensional nano-conductor materials is at an angle with the upper surface of the electrode body, and the angle is greater than 70° and

less than 90°

.

2. The electrode structure according to claim 1, wherein the one-dimensional nano-conductor materials have a structure including at least one of nano wire, nanobelt, nanotube, or nanorod.

3. The electrode structure according to claim 1, wherein the one-dimensional nano-conductor materials include any one of carbon, elemental metal, or alloy;

metallic elements for forming the elemental metal element include;

any one selected from the group consisted of gold, silver, copper, cobalt, nickel, zinc, iron, platinum, ruthenium, molybdenum, niobium, iridium, palladium, titanium, cadmium, tungsten, vanadium, and bismuth; and

metallic elements in the alloy include;

at least one selected from gold, silver, copper, cobalt, nickel, zinc, iron, platinum, ruthenium, molybdenum, niobium, iridium, palladium, titanium, cadmium, tungsten, vanadium, and bismuth.

4. The electrode structure according to claim 3, wherein the one-dimensional nano-conductor materials are carbon nanotubes.

5. The electrode structure according to claim 1, wherein the main body glue is ultraviolet (UV) curing adhesive or heat curing adhesive.

6. The electrode structure according to claim 1, wherein the electrode body is made from any material of transparent conductive material, metal, or alloy.

7. The electrode structure according to claim 1, wherein the one-dimensional nano-conductor materials are arranged in parallel.

8. The electrode structure according to claim 1, wherein a thickness of the composite layer is ranged from 20 μ

m to 200 μ

m.

9. A fingerprint recognition module, comprising the electrode structure according to claim 1.

14. A display device, comprising the fingerprint recognition module according to claim 9.

10. A fingerprint recognition module comprising an electrode structure, the electrode structure comprising an electrode body, and a composite layer disposed on the electrode body, a surface of the composite layer away from the electrode body being set to be a finger contact surface in a case of fingerprint recognition,

wherein the composite layer is made from composite materials formed by a cured main body glue and one-dimensional nano-conductor materials distributed in the main body glue,

wherein an end of each of the one-dimensional nano-conductor materials is exposed from the finger contact surface of the composite layer, and the other end of each of the one-dimensional nano-conductor materials makes contact with the electrode body, and

wherein the electrode bodies of a plurality of electrode structures are arranged with interval, and the composite layers of the plurality of electrode structures have an integrated structure.

12. A method for manufacturing the fingerprint recognition module according to claim 10, comprising:

forming a conductive film on a substrate;

forming a composite film for covering the conductive film, in which the composite film is made from composite materials formed by a main body glue and one-dimensional nano-conductor materials distributed in the main body glue;

the one-dimensional nano-conductor materials are arranged in parallel;

one end of each of the one-dimensional nano-conductor materials is exposed on a finger contact surface of the main body glue, and the other end of each of the one-dimensional nano-conductor materials makes contact with the conductive film;

curing the main body glue; and

performing patterning process on the conductive film and the composite film, forming a plurality of spaced electrode bodies and composite layers disposed on upper surfaces of the electrode bodies, and forming the electrode structures by the electrode bodies and the composite layers.

13. A method for manufacturing the fingerprint recognition module according to claim 10, comprising:

forming a conductive film on a substrate;

performing patterning process on the conductive film, and forming a plurality of spaced electrode bodies;

forming a composite film for covering the substrate and the electrode bodies, in which the composite film is made from composite materials formed by main body glue and one-dimensional nano-conductor materials distributed in the main body glue;

the one-dimensional nano-conductor materials are arranged in parallel;

one end of each of the one-dimensional nano-conductor materials is exposed on a finger contact surface of the main body glue, and the other end of each of the one-dimensional nano-conductor materials makes contact with the conductive film; and

curing the main body glue, and forming the plurality of electrode structures, in which the plurality of electrode structures are formed by the plurality of spaced electrode bodies and the composite film disposed on upper surfaces of the electrode bodies, and the composite film is an integrated structure.

15. A display device, comprising the fingerprint recognition module according to claim 10.

11. The A fingerprint recognition module comprising an electrode structure, the electrode structure comprising an electrode body, and a composite layer disposed on the electrode body, a surface of the composite layer away from the electrode body being set to be a finger contact surface in a case of fingerprint recognition,

wherein the composite layer is made from composite materials formed by a cured main body glue and one-dimensional nano-conductor materials distributed in the main body glue,

wherein an end of each of the one-dimensional nano-conductor materials is exposed from the finger contact surface of the composite layer, and the other end of each of the one-dimensional nano-conductor materials makes contact with the electrode body, and

wherein a plurality of electrode structures are arranged with interval.

16. A display device, comprising the fingerprint recognition module according to claim 11.