# US 2019/0355907 A1 · Substrate, display device, conductive film and method for fabricating the same

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 2019/0355907 A1
- Document ID: US20190355907A1
- Status: Published application
- Kind: A1
- Application number: 16/484,104
- Filed: 2018-11-29
- Published: 2019-11-21
- Earliest claimed: 2017-12-15
- Assignees: Boe Technology Group Co., Ltd.
- Applicants: Boe Technology Group Co., Ltd.
- Inventors: Yingying SONG
- Web page: https://patentgrep.com/patent/US20190355907A1

## CPC

- H10K 71/60: Forming conductive regions or layers, e.g. electrodes
- H10K 85/10: Organic polymers or oligomers
- H10K 85/1135: {Polyethylene dioxythiophene [PEDOT]; Derivatives thereof}
- H10K 50/17: Carrier injection layers
- H10K 59/8051: {Anodes}
- H10K: ORGANIC ELECTRIC SOLID-STATE DEVICES

## Abstract

A substrate includes a base substrate and a conductive pattern provided disposed on the base. A material of the conductive pattern includes a second conductive polymer and a dopant. The second conductive polymer is a conductive polymer transformed from a first conductive polymer under an action of the dopant. A conductivity of the second conductive polymer is greater than a conductivity of the first conductive polymer

## Claims

### Claim 1

A substrate, comprising a base substrate and a conductive pattern disposed on the base substrate, wherein
a material of the conductive pattern includes a second conductive polymer and a dopant, and the second conductive polymer is a conductive polymer transformed from a first conductive polymer under an action of the dopant; and
a conductivity of the second conductive polymer is greater than a conductivity of the first conductive polymer.

### Claim 2 (depends on 1)

The substrate according to claim 1, wherein the conductive pattern includes a plurality of layers of sub-conductive patterns that are stacked; and a material of each of the plurality of layers of sub-conductive patterns includes the second conductive polymer and the dopant.

### Claim 3 (depends on 2)

The substrate according to claim 2, wherein among the plurality of layers of sub-conductive patterns, materials of at least two adjacent layers of sub-conductive patterns are not completely the same.

### Claim 4 (depends on 2)

The substrate according to claim 2, wherein the conductive pattern includes at least one layer of first sub-conductive pattern and at least one layer of second sub-conductive pattern, and each of the at least one layer of first sub-conductive pattern and each of the at least one layer of second sub-conductive pattern are alternately disposed;
a material of each of the at least one layer of first sub-conductive pattern is the same, and a material of each of the at least one layer of second sub-conductive pattern is the same; and
the material of the first sub-conductive pattern and the material of the second sub-conductive pattern contain a same second conductive polymer and different dopants.

### Claim 5

(canceled)

### Claim 6 (depends on 1)

The substrate according to claim 1, wherein the material of the first conductive polymer is selected from at least one of poly(3,4-ethylenedioxythiophene) (PEDOT), polythiophene, polypyrrole, polyaniline, and polyphenylene.

### Claim 7 (depends on 1)

The substrate according to claim 1, wherein a material of the dopant is selected from at least one of polyvinyl alcohol (PVA) and dimethyl sulfoxide (DMSO).

### Claim 8 (depends on 7)

The substrate according to claim 7, wherein
in a case where the dopant includes the polyvinyl alcohol (PVA), a ratio of PVA to the material of the conductive pattern is 0.01 wt % to 1 wt %; and
in a case where the dopant includes the dimethyl sulfoxide (DMSO), a ratio of DMSO to the material of the conductive pattern is 0.01 wt % to 6 wt %.

### Claim 9 (depends on 1)

The substrate according to claim 1, wherein the material of the conductive pattern further includes a solubilizer.

### Claim 10 (depends on 9)

The substrate according claim 9, wherein a material of the solubilizer includes poly(styrene sulfonate) (PSS).

### Claim 11 (depends on 1)

A display device, comprising the substrate according to claim 1.

### Claim 12 (depends on 11)

The display device according to claim 11, wherein the display device is an organic electroluminescent display (OELD) device; and a base substrate of the substrate is a flexible base substrate.

### Claim 13

A method of fabricating a conductive film, comprising:
making a surface of a base substrate on which films are to be formed positively or negatively charged;
immersing the base substrate in a mixed solution for a period of time, taking out the base substrate from the mixed solution and drying the base substrate, so as to form a layer of sub-conductive film on the surface of the base substrate on which films are to be formed, the mixed solution including a second conductive polymer and a dopant, and the second conductive polymer being a conductive polymer transformed from a first conductive polymer under an action of the dopant;
repeating a process of immersing the base substrate formed with a layer of sub-conductive film in the mixed solution for a period of time, taking out the base substrate from the mixed solution and drying the base substrate at least once; and
forming a plurality of layers of sub-conductive films on the base substrate through the above steps, the plurality of layers of sub-conductive films constituting the conductive film.

### Claim 14 (depends on 13)

The method according to claim 13, wherein among mixed solutions in which the base substrate is immersed a plurality of times, at least two mixed solutions are not completely the same.

### Claim 15 (depends on 14)

The method according to claim 14, wherein the mixed solutions in which the base substrate is immersed a plurality of times include a first mixed solution and a second mixed solution; the first mixed solution is a mixed solution in which the base substrate is immersed at an odd-number-th time, and the second mixed solution is a mixed solution in which the base substrate is immersed at an even-number-th time; and the first mixed solution and the second mixed solution contain a same second conductive polymer and different dopants.

### Claim 16 (depends on 14)

The method according to claim 14, wherein the mixed solution further includes a solubilizer.

### Claim 17 (depends on 14)

The method according to claim 14, wherein the step of making a surface of a base substrate on which films are to be formed positively or negatively charged, includes:
treating the surface of the base substrate on which films are to be formed, such that the surface of the base substrate on which films are to be formed has a positive or negative charge.

### Claim 18 (depends on 17)

The method according to claim 17, wherein the step of treating the surface of the base substrate on which films are to be formed, includes:
performing a plasma treatment or an electrochemical treatment on the surface of the substrate on which films are to be formed.

### Claim 19 (depends on 14)

The method according to claim 14, wherein the period of time is 20 to 30 minutes.

### Claim 20 (depends on 13)

The method according to claim 13, wherein the first conductive polymer has a benzenoid structure, and the second conductive polymer has a quinoid structure.

### Claim 21 (depends on 13)

A conductive film, wherein the conductive film is fabricated by the method of fabricating a conductive film according to claim 13.