Method for making touch panel
First Claim
1. A method for making a touch panel, the method comprising the steps of:
- (a) providing a flexible substrate having a first surface;
(a1) drawing at least two carbon nanotube films directly from a super-aligned carbon nanotube array;
(b) applying a transparent carbon nanotube layer on the first surface of the flexible substrate, wherein the transparent carbon nanotube layer is formed by stacking the at least two carbon nanotube films, each of the at least two carbon nanotube films comprises a plurality of carbon nanotubes aligned substantially along a same direction and parallel to the first surface of the flexible substrate, the at least two carbon nanotube films are directly stacked with each other, and an angle is formed between the aligned directions of the carbon nanotubes in adjacent carbon nanotube films;
(c) heat-pressing the transparent carbon nanotube layer on the flexible substrate;
(d) locating two electrodes on opposite ends of the flexible substrate;
(e) placing an insulative layer on edges of the first surface of the flexible substrate, the first surface having the transparent carbon nanotube layer formed thereon to form a first electrode plate;
(h) repeating steps (a) to (e) to obtain a second electrode plate; and
(f) securing the first electrode plate to the second electrode plate, with the insulative layer located between the first electrode plate and the second electrode plate, and wherein the transparent carbon nanotube layer of the first electrode plate is adjacent to the transparent carbon nanotube layer of the second electrode plate.
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Accused Products
Abstract
A method for making a touch panel includes the steps of: (a) providing a flexible substrate; (b) applying at least one carbon nanotube layer on the flexible substrate; (c) heat-pressing the carbon nanotube layer on the flexible substrate; (d) locating two electrodes on opposite ends of the flexible substrate; (e) placing an insulative layer on edges of a first surface of the flexible substrate, the first surface having the carbon nanotube layer formed thereon; and (f) securing the first electrode plate to a second electrode plate, with the insulative layer located between the first electrode plate and the second electrode plate, and wherein the carbon nanotube layer of the first electrode plate is adjacent to a carbon nanotube layer of the second electrode plate.
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Citations
20 Claims
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1. A method for making a touch panel, the method comprising the steps of:
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(a) providing a flexible substrate having a first surface; (a1) drawing at least two carbon nanotube films directly from a super-aligned carbon nanotube array; (b) applying a transparent carbon nanotube layer on the first surface of the flexible substrate, wherein the transparent carbon nanotube layer is formed by stacking the at least two carbon nanotube films, each of the at least two carbon nanotube films comprises a plurality of carbon nanotubes aligned substantially along a same direction and parallel to the first surface of the flexible substrate, the at least two carbon nanotube films are directly stacked with each other, and an angle is formed between the aligned directions of the carbon nanotubes in adjacent carbon nanotube films; (c) heat-pressing the transparent carbon nanotube layer on the flexible substrate; (d) locating two electrodes on opposite ends of the flexible substrate; (e) placing an insulative layer on edges of the first surface of the flexible substrate, the first surface having the transparent carbon nanotube layer formed thereon to form a first electrode plate; (h) repeating steps (a) to (e) to obtain a second electrode plate; and (f) securing the first electrode plate to the second electrode plate, with the insulative layer located between the first electrode plate and the second electrode plate, and wherein the transparent carbon nanotube layer of the first electrode plate is adjacent to the transparent carbon nanotube layer of the second electrode plate. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A method for making a touch panel, the method comprising the steps of:
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(a) providing a flexible substrate having a first surface; (b) stacking at least two carbon nanotube films directly on the first surface of the flexible substrate to form a transparent carbon nanotube layer, wherein each of the at least two carbon nanotube films comprises a plurality of carbon nanotubes aligned along a same direction and joined end to end by van der Waals force and parallel to the first surface of the flexible substrate, and the at least two carbon nanotube films are directly in contact with each other, wherein each of the at least two carbon nanotube films are obtained by the steps of; providing a substantially flat and smooth substrate; forming a catalyst layer on the substrate; annealing the substrate with the catalyst layer in air at a temperature in the approximate range from 700°
C. to 900°
C. for about 30 to 90 minutes;heating the substrate with the catalyst layer to a temperature in the approximate range from 500°
C. to 740°
C. in a furnace with a protective gas therein;supplying a carbon source gas to the furnace for about 5 minutes to 30 minutes and growing a super-aligned array of carbon nanotubes on the substrate; selecting one or more carbon nanotubes having a predetermined width from the array of carbon nanotubes; pulling the carbon nanotubes directly from the array of carbon nanotube, to form carbon nanotube segments at an uniform speed to achieve the carbon nanotube film; (c) heat-pressing the transparent carbon nanotube layer on the flexible substrate; (d) locating two electrodes on opposite ends of the flexible substrate; (e) placing an insulative layer on edges of the first surface of the flexible substrate, the first surface having the transparent carbon nanotube layer formed thereon to form a first electrode plate; (h) repeating steps (a) to (e) to obtain a second electrode plate; and (f) securing the first electrode plate to the second electrode plate, with the insulative layer located between the first electrode plate and the second electrode plate, and wherein the transparent carbon nanotube layer of the first electrode plate is adjacent to the transparent carbon nanotube layer of the second electrode plate. - View Dependent Claims (19)
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20. A method for making a touch panel, the method comprising the steps of:
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(a) providing a flexible substrate having a surface; (b) applying a transparent carbon nanotube layer on the surface of the flexible substrate, wherein the transparent carbon nanotube layer is formed by stacking at least two carbon nanotube films, each of the at least two carbon nanotube films comprises a plurality of carbon nanotubes aligned substantially along a same direction and parallel to the surface of the flexible substrate, the at least two carbon nanotube films are directly stacked with each other, and an angle is formed between the aligned directions of the carbon nanotubes in adjacent carbon nanotube films, wherein each of the at least two carbon nanotube films has a width of approximately 10 centimeters; (c) adhering the carbon nanotube layer adhering firmly on the substrate by dropping a volatilizable organic solvent onto the transparent carbon nanotube layer to soak the transparent carbon nanotube layer; (d) heat-pressing the transparent carbon nanotube layer on the flexible substrate; (e) locating two electrodes on opposite ends of the flexible substrate; (f) placing an insulative layer on edges of the surface of the flexible substrate to form a first electrode plate on the surface; (h) repeating steps (a) to (f) to obtain a second electrode plate; and (i) securing the first electrode plate to the second electrode plate, with the insulative layer located between the first electrode plate and the second electrode plate, and wherein the transparent carbon nanotube layer of the first electrode plate is adjacent to the transparent carbon nanotube layer of the second electrode plate.
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Specification