# US 8,772,145 B2 · Carbon nanotube dispersion liquid and method of manufacturing thin layer and display panel using the same

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

- Number: US 8,772,145 B2
- Document ID: US8772145B2
- Status: Granted
- Kind: B2
- Application number: 12/956,795
- Filed: 2010-11-30
- Published: 2011-07-07
- Granted: 2014-07-08
- Earliest claimed: 2009-12-01
- Assignees: LG Display Co., Ltd.
- Applicants: Jaehyun Kim; Seongkee Park; Jungshik Lim; Taeyoung Lee; Mincheol Kim
- Inventors: Jaehyun Kim; Seongkee Park; Jungshik Lim; Taeyoung Lee; Mincheol Kim
- Web page: https://patentgrep.com/patent/US8772145B2

## CPC

- C01B 32/174: Derivatisation; Solubilisation; Dispersion in solvents
- B82Y 10/00: Nanotechnology for information processing, storage or transmission, e.g. quantum computing or single electron logic
- B82Y 30/00: Nanotechnology for materials or surface science, e.g. nanocomposites
- B82Y 40/00: Manufacture or treatment of nanostructures
- H10K 71/12: using liquid deposition, e.g. spin coating
- H10K 85/221: {Carbon nanotubes}
- C01B: NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; {METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C}
- B82Y: SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- H10K: ORGANIC ELECTRIC SOLID-STATE DEVICES

## Abstract

The present invention relates to a carbon nanotube dispersion liquid includes carbon nanotubes, a self assembly material having —NR2 in one terminal thereof and —Si(OR)3 or —SH in the other terminal thereof, and a solvent, as well as its usage.

## Claims

### Claim 1

A carbon nanotube dispersion liquid comprising:
carbon nanotubes;
a self assembly material having —NR2 at one terminal thereof and having —SH at the other terminal thereof, wherein, R is H or CnH(2n+1), with n is natural number; and
a solvent,
wherein the self assembly material having —SH at the other terminal thereof comprises an aminoalkane thiol group,
wherein the content of carbon nanotube in the carbon nanotube dispersion liquid is below about 10 wt %, and
wherein the content of self assembly material in the carbon nanotube dispersion liquid is below 1 vol %.

### Claim 2 (depends on 1)

The carbon nanotube dispersion liquid of claim 1, wherein the content of carbon nanotube in the carbon nanotube dispersion liquid is within about 0.1 wt %˜about 1 wt %.

### Claim 3 (depends on 1)

The carbon nanotube dispersion liquid of claim 1, wherein the solvent includes at least one selected from a group consisting of DI water, DMF, DCE, alcohol based material, toluene based material and alkyne based material.

### Claim 4 (depends on 1)

The carbon nanotube dispersion liquid of claim 1, wherein the content of self assembly material in the carbon nanotube dispersion liquid is within about 0.1 vol %˜about 1 vol %.

### Claim 5

A method of manufacturing a carbon nanotube thin film, comprising:
providing a substrate; and
coating a carbon nanotube dispersion liquid including carbon nanotubes, a self assembly material having —NR2 in one terminal thereof and —SH in the other terminal thereof, wherein, R is H or CnH(2n+1), with n is natural number, and a solvent on the substrate to form a thin film,
wherein the self assembly material having —SH at the other terminal thereof comprises an aminoalkane thiol group,
wherein the content of carbon nanotube in the carbon nanotube dispersion liquid is below about 10 wt %, and
wherein the content of self assembly material in the carbon nanotube dispersion liquid is below 1 vol %.

### Claim 6 (depends on 5)

The method of claim 5, wherein the substrate is one selected from a group consisting of Si, SiNx, SiO2 and a dielectric layer.

### Claim 7

A method of manufacturing a display device, comprising:
providing a substrate;
forming a gate electrode on the substrate;
forming a gate insulating layer on the substrate including the gate electrode; and
coating a carbon nanotube dispersion liquid including carbon nanotubes, a self assembly material having —NR2 in one terminal thereof and —SH in the other terminal thereof, wherein, R is H or CnH(2n+1), with n is natural number, and a solvent on the gate insulating layer to form a thin film over the gate electrode,
wherein the self assembly material having —SH at the other terminal thereof comprises an aminoalkane thiol group,
wherein the content of carbon nanotube in the carbon nanotube dispersion liquid is below about 10 wt %, and
wherein the content of self assembly material in the carbon nanotube dispersion liquid is below 1 vol %.

### Claim 8 (depends on 7)

The method of claim 7, wherein the thin film comprises one of a transparent conductive layer or a semiconductor layer.