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Capacitor touch pad based on carbon nanotube film

A carbon nanotube film, carbon nanotube technology, which is applied in the direction of electrical digital data processing, data processing input/output process, instruments, etc., can solve the problem of high cost of capacitive touch panels, achieve low power consumption, environmental friendliness The effect of pollution, simple preparation process

Active Publication Date: 2014-02-05
SUZHOU INST OF NANO TECH & NANO BIONICS CHINESE ACEDEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But compared with the traditional resistive touch panel, the cost of capacitive touch panel is still higher

Method used

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  • Capacitor touch pad based on carbon nanotube film
  • Capacitor touch pad based on carbon nanotube film
  • Capacitor touch pad based on carbon nanotube film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Embodiment 1 refers to Figure 1-2 , the capacitive touch panel includes a stacked conductive layer 1, a dielectric layer 3 and a conductive base 2, the conductive layer and the conductive base are respectively connected to at least one upper electrode 4 and at least one lower electrode 5, wherein the conductive layer is a carbon nanotube film layer.

[0047] The preparation process of the capacitive touch panel is as follows:

[0048] (1) A carbon nanotube film is selected as the conductive layer 1 .

[0049] (2) Preparation of silicon dioxide substrate: SiO with a thickness of 20 nm is oxidized and evaporated on a highly doped silicon wafer 2 2 Dielectric layer 3.

[0050] (3) Transfer the carbon nanotube film to the silicon dioxide-silicon substrate. Use a copper sheet as an electrode to draw two wires from the carbon nanotube film and the conductive substrate silicon respectively to form a capacitive touch panel.

[0051] The carbon nanotube film involved in thi...

Embodiment 2

[0056] Embodiment 2 The structure of the capacitive touch panel of this embodiment is basically the same as that of Embodiment 1, and its preparation process is as follows:

[0057] (1) select the multi-walled carbon nanotube film as the conductive layer: with reference to Example 1, get the commercially available multi-walled carbon nanotubes to prepare the multi-walled carbon nanotube film as the conductive layer, and the conductivity of the carbon nanotube film is at 30~500Ω / □, the tensile strength is between 200 and 500 MPa.

[0058] (2) Preparation of single-walled carbon nanotube film-polymer substrate: disperse single-walled carbon nanotubes to prepare a single-walled carbon nanotube film, which is attached to the lower end surface of the polymer film as a conductive substrate, and the polymer film as a dielectric Layer, the polymer film can choose polyvinyl alcohol, polyvinyl formal, polyethylene, cellulose and other insulating materials.

[0059] (3) Transfer the pr...

Embodiment 3

[0061] Embodiment 3 The structure of the capacitive touch panel of this embodiment is basically the same as that of Embodiments 1 and 2, and its preparation process is as follows:

[0062] (1) Select a certain mass ratio of single-wall and multi-wall carbon nanotube mixed films as the conductive layer: with reference to Example 1, get commercially available single-wall carbon nanotubes and multi-wall carbon nanotube mixed powders to prepare mixed carbon nanotubes The thin film acts as a conductive layer.

[0063] (2) Preparation of mica-aluminum substrate: A mica sheet with a thickness of about tens of microns is attached to the metal aluminum film, the aluminum film is used as a conductive substrate, and the mica sheet is used as a dielectric layer.

[0064] (3) The prepared mixed carbon nanotube film was transferred to the mica-aluminum substrate, and copper sheets were used as electrodes to draw two wires from the mixed carbon nanotube film and the metal aluminum film respe...

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Abstract

The invention relates to a capacitor touch pad based on carbon nanotube film, which comprises a conducting layer arranged on the surface of a conducting substrate and more than two electrodes; the two electrodes are respectively and electrically connected with the conducting layer and the conducting substrate; the conducting layer comprises at least one carbon nanotube film layer; the carbon nanltube film mainly consists of a network interwoven by any one or two of a market single-wall carbon nanotube, a double-wall carbon nanotube and a multi-wall carbon nanotube, wherein the dosage of the carbon nanotube is 0.01-0.7 mg / sq.cm, the light transmittance of the carbon nanotube film is 50-97%, the conductivity is 30-500 omega / cm, and the tensile strength is between 200 MPa and 2000 MPa. Carbon nanotube film made of market carbon nanotube is taken as the conducting layer; therefore, the capacitor touch pad has high capacitance, high sensitivity, strong anti-jamming capability, fast responding speed, low power consumption and simple preparation technique, and is capable of realizing large batch and large area preparation, easy source, low cost and no pollution to the environment.

Description

technical field [0001] The invention relates to a touch panel, in particular to a capacitive touch panel based on a carbon nanotube film. Background technique [0002] The touchpad uses capacitive sensing to know the movement of the human body's fingers, but it is not sensitive to the heat of the human body's fingers. When a person's finger touches the board, the electrostatic field on the board will change. A touchpad sensor is simply a conductive trace of finger traces printed on the surface of the pad. A special integrated circuit board under the surface of the touchpad will constantly measure and report this trajectory, thereby detecting the movement and position of the human finger. Existing touch panels mainly include two types: resistive and capacitive. Among them, the resistive touch panel requires pressure to obtain a corresponding signal, resulting in poor operational stability, easy aging, and low sensitivity. Compared with resistive touch panels, capacitive t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F3/044
Inventor 石准陈新江王学文张珽靳健
Owner SUZHOU INST OF NANO TECH & NANO BIONICS CHINESE ACEDEMY OF SCI