Carbon nano-tube pattern wiring, transparent conductive substrate, and heater having the same

Patent metadata

Field	Value
Publication number	US-12150218-B2
Application number	US-202117381828-A
Country	US
Kind code	B2
Filing date	Jul 21, 2021
Priority date	Jan 23, 2019
Publication date	Nov 19, 2024
Grant date	Nov 19, 2024

Abstract

The wiring includes a substrate having one surface and a CNT pattern having multiple CNT lines which are made of a line-shape CNT on the surface and have a height of 1 μm or more. In the cross section taken along one direction on the one surface, the CNT pattern wiring is a line-and-space film in which the opening is located between the plurality of adjacent CNT lines.

First claim

What is claimed is:

1. A carbon nanotube pattern wiring comprising:
a substrate having one surface; and
a CNT pattern having a plurality of carbon nanotube lines which is arranged on the one surface, has a height of 1 μm or more, and is made of a line-shape carbon nanotube, wherein:
the CNT pattern is a line-and-space film with an opening which is located between the plurality of adjacent carbon nanotube lines in a cross section taken along one direction on the one surface;
each carbon nanotube line has a base portion which has a height direction perpendicular to the one surface;
each base portion has a width of 350 μm or less;
each carbon nanotube line has a flange portion protruding from the base portion on the one surface;
each base portion has a first width;
each flange portion has a second width;
a ratio between the second width and the first width is 1.35 or more;
a part of the substrate between the flange portions is exposed from the CNT pattern; and
a sheet resistance of the CNT pattern is 30Ω/□ or less.

2. The carbon nanotube pattern wiring according to claim 1 , wherein:
the carbon nanotube providing the carbon nanotube lines is arranged in a state of being randomly oriented with respect to the substrate.

3. The carbon nanotube pattern wiring according to claim 1 , wherein:
a density of the carbon nanotube is in a range between 0.1 g/cm 3 and 1.1 g/cm 3 .

4. The carbon nanotube pattern wiring according to claim 1 , wherein:
the height of each carbon nanotube line is 5 μm or more.

5. The carbon nanotube pattern wiring according to claim 1 , wherein:
the flange portions of adjacent carbon nanotube lines are connected to each other.

6. A transparent conductive substrate comprising:
the carbon nanotube pattern wiring according to claim 1 , wherein:
the substrate is made of a transparent substrate; and
the base portion has a width of 10 μm or less.

7. A heater comprising:
the carbon nanotube pattern wiring according to claim 1 .

Assignees

• Denso Corp
• National Univ Corporation Tokai National Higher Education And Research System

Inventors

• Naruse Junichi
• Oshima Hisayoshi
• Fujiwara Yoshimichi
• Takahashi Toshiyuki
• Hiramatsu Hidehiko
• Fugane Keisuke
• Ohno Yutaka

Classifications

• H05B2214/04

  Heating means manufactured by using nanotechnology · CPC title

• H05B2203/017

  Manufacturing methods or apparatus for heaters · CPC title

• H05B3/34

  flexible, e.g. heating nets or webs · CPC title

• H05B3/84

  Heating arrangements specially adapted for transparent or reflecting areas, e.g. for demisting or de-icing windows, mirrors or vehicle windshields · CPC title

• H05K1/09

  Use of materials for the {conductive, e.g. } metallic pattern · CPC title