KR20120136531A - Conductive multilayer structure and touch panel having the same - Google Patents

Abstract

PURPOSE: A conductive multiple layer structure and touch panel including the same are provided to maintain excellent physical property by adding inorganic silt. CONSTITUTION: A material includes thickness of 100-125 micrometer by including inorganic silt. A first surface(101) faces to a second surface(102). A transparent conductive layer(11) is formed on a first surface. A hard coating layer(12) is formed on a second surface. A protection layer(13) is formed on the hard coating layer. The transparent conductive layer is transparent conductive oxide. The transparent conductive layer is ITO(indium tin oxide).

Description

CONDUCTIVE MULTILAYER STRUCTURE AND TOUCH PANEL HAVING THE SAME}

The present invention relates to a multilayer structure and a touch panel having the same, and more particularly, to a conductive multilayer structure and a touch panel having the same.

In recent years, tactile sensing human-computer interfaces, such as touch panels, have been widely used in various electronic products, such as satellite positioning systems (GPS), personal digital assistants (PDAs). It is applied to a mobile phone, a table PC, etc. As the tactile sensing human-computer interface is gradually adopted in place of the traditional input device of portable electronic products, the affinity and intuition of the human-computer interface of the electronic device improves the operation and saves the volume occupied by the traditional input device. As a result, the dimensions of portable electronic products are also lighter.

The touch panel can be divided into resistive, capacitive, electronic, infrared and ultrasonic based on the sensing principle. For example, the resistive touch panel uses two conductive films as upper and lower electrodes, so that the upper and lower electrodes are energized by applying pressure by the user, so that the position of the contact point may be calculated only when the voltage change is measured. On the other hand, according to the capacitive touch panel, the conductive substrate is formed by installing the conductive material on the substrate, and a uniform electric field is formed on the surface of the substrate during the square discharge of the conductive substrate, and the conductive object (for example, a user's finger) is formed. When touching the surface of the furnace, a small amount of current is absorbed. Such subtle changes are transmitted to the connected control device, whereby the contact position of the conducting object is measured by further analysis.

The substrate according to the known art may be a glass substrate or a plastic substrate. For example, in order to achieve relatively desirable structural strength and wear resistance, for example, the PET substrate must have a considerable thickness and thus touch. The thickness of the panel structure becomes thick, which is not advantageous to the demand for weight reduction. In addition, a relatively thick PET substrate may cause inconvenience in use since the user may touch the touch panel only by using a strong pressure. Therefore, weight reduction of the touch panel thickness and achieving user's ease of operation are one of directions for those skilled in the art.

SUMMARY OF THE INVENTION An object of the present invention is to provide a conductive multilayer structure and a touch panel having the same. The conductive multilayer structure according to the present invention has a thin type effect, and is applicable to both hardness and abrasion resistance even in physical properties. Conforms to the norm. In addition, the conductive multilayer structure according to the present invention can reduce the pressure of the operation can increase the sensitivity when the user presses.

Embodiments according to the present invention include a substrate having a first surface and a second surface facing each other, a mixture of inorganic silts, and having a thickness of between 100 μm and 125 μm; A transparent conductive film formed on the first surface; A hard coating layer formed on the second surface; And a protective layer formed on the hard coating layer.

Embodiments according to the present invention provide a touch panel manufactured to have the aforementioned conductive multilayer structure.

The conductive multilayer structure according to the present invention can maintain excellent physical properties even in a situation where the thickness is reduced by adding the inorganic silt. In other words, the present invention has the beneficial effect of reducing the thickness of the conductive multilayer structure on the one hand and satisfying the requirements of wear resistance and hardness to be considered when applied to the touch panel on the other hand.

1 is an explanatory view of a conductive multilayer structure according to the present invention.

BRIEF DESCRIPTION OF DRAWINGS To understand the features and the technical contents according to the present invention better, the present invention will be described with reference to the following detailed description and the accompanying drawings. The accompanying drawings, however, are used only for reference and description and are not intended to limit the invention.

The present invention has an effect of thinning, lightening, and the like, and also provides a conductive multilayer structure that can reduce the force when a user touches.

Referring to FIG. 1, the conductive multilayer structure according to the present invention may include at least the substrate 10, the transparent conductive film 11, the hard coating layer 12, and the protective layer 13.

According to the present embodiment, the substrate 10 may be a transparent plate body, for example, a polycarbonate (PC) material, polymethylmethacrylate (PMMA) or polyethylene terephthalate ( Polyethylene terephthalate (PET) materials are flexible, light, resistant to collisions, and have unbreakable properties. However, the present invention is not limited thereto. For example, a polyester resin, an acetic ester resin, a polyethersulfone resin, a polycarbonate resin, a polyamide resin, Polyimide resin, polyene resin, methacrylic acid resin, polyvinyl chloride (PVC), polyvirylidene fluoride resin, polystyrene polystyrene resin, polyvinyl alcohol resin, polyarylester resin, polyphenylene sulfide (PPS) resin and the like. In addition, the inorganic silt (inorganic silt) is mixed in the substrate 10 of the PET material according to the present invention, the average particle diameter of 0.5μm to 20μm silicon dioxide, calcium oxide, alumina, titanium oxide, zirconia, tin oxide, oxide Conductive inorganic silts such as indium, cadmium oxide, and antimony oxide, or materials composed of suitable polymers of methacrylic acid and polyurethane include crosslinked or uncrosslinked organic silts, and the composition ratio is about The thickness D1 of the substrate 10 according to the present invention is reduced to 100 μm to 125 μm by adding an inorganic silt to increase the wear resistance of the conductive multilayer structure of the present invention, and thus to be 50% or more. Compared with a PET film of about 188 μm, both the weight and the thickness of the conductive multilayer structure according to the present invention can satisfy the requirements of thinning and weight reduction.

The transparent conductive film 11 according to the present invention is formed on the first surface 101 (eg, the bottom surface) of the substrate 10, wherein the transparent conductive film 11 is a transparent conducting oxide (TCO). For example, conductive films or organic materials of crystalline and amorphous indium tin oxide (ITO), indium zinc oxide (IZO), chromic oxide, zinc oxide (ZnO), titanium oxide (TiO) It may be made of a transparent conductive material, but is not limited thereto. Specifically, the transparent conductive film 11 may be manufactured by a fabrication process such as a vacuum vapor deposition method, a sputtering method, an ion spray plating method, a gel method, or the like. .

In addition, the hard coat layer 12 according to the invention is formed on a second surface 102 (eg, an upper surface) opposite the first surface. Specifically, the hard coating layer 12 is a curable resin such as melanin resin, carbamate resin, alkyd resin, acrylic acid resin, polysiloxane, or the like. Most preferably, the thickness is between 6 μm and 10 μm, and the hard coating layer 12 has the effects of abrasion resistance, anti-chemistry, and anti-UV (ultraviolet) resistance, for example, hard coating. The layer 12 protects the substrate 10 of the PET to prevent it from deteriorating due to the effects of light, in particular ultraviolet (UV) light shining on it.

The protective layer 13 according to the invention is formed on the hard coat layer 12. According to a specific embodiment, the protective layer 13 may be of silicon dioxide (SiO 2) fabricated by vacuum sputtering, electron beam (EB) or chemical vapor deposition (CVD), the thickness of which is between about 1 μm and 4 μm. Is in. However, according to a variant embodiment, the protective layer 13 may be made of a material such as silicon nitride, photoresist, or the like.

According to the above-described structure and composition, the thickness of the conductive multilayer structure according to the present invention can be greatly reduced, which does not cause a defect in the characteristics of the conductive multilayer. For example, after actual verification, the inorganic silt is mixed in the substrate 10, so that the overall wear resistance of the conductive multilayer structure can exceed 200000 cycles, and the overall hardness is greater than 3H. In other words, the conductive multilayer structure according to the present invention can satisfy the specification requirements in the application.

The conductive multilayer structure according to the present invention can be applied to various display devices such as touch panels, liquid crystal display devices, and electroluminescent display devices, and most preferably applied to transparent electrode plates for touch panels.

For example, the resistive touch panel includes a touch-side electrode plate of a conductive multilayer structure and a display-side electrode plate of a transparent conductive film, and is formed by being disposed to face each other through a distance piece. However, the conductive multilayer structure according to the present invention can be used for the electrode plate on either side of the touch side or the display side. When the operator applies pressure from the touch side electrode plate to the input pen or the like, the touch side electrode plate and the display side electrode plate come into contact with each other, and the touch panel is turned on. Returns to the non-energized (OFF) state of.

In summary, the present invention has at least the following advantages.

1. When the conductive multilayer structure according to the present invention is applied to the touch panel, since the thickness of the entire film layer is reduced, the sensitivity when the user is pressed and the touch pressure is also reduced, the touch according to the present invention through actual experiments In the case of using the panel, it has been found that the touch operation can be performed only by pressing the pressure of 5 to 15 g.

2. The conductive multilayer structure according to the present invention may have a hardness of at least 3H, and also passes a checkerboard test, and thus various image display devices (eg, TFT-LCD, LCD-) having a touch panel. TV).

Although only preferred embodiments according to the present invention have been described, this cannot limit the scope of the present invention, and therefore, all technical changes having equivalent effects to those based on the specification and the contents of the present invention are all within the scope of the present invention. Included.

10: base material 101: first surface
102: second surface 11: transparent conductive film
12: hard coating layer 13: protective layer

Claims (10)

A substrate having a first surface and a second surface opposed to each other, wherein the inorganic silt is mixed and having a thickness of between 100 μm and 125 μm;
A transparent conductive film formed on the first surface;
A hard coating layer formed on the second surface; And
And a protective layer formed on the heart coating layer. The method of claim 1,
The transparent conductive film is a conductive multilayer structure, characterized in that the transparent conductive oxide. The method of claim 2,
The transparent conductive film is a conductive multilayer structure, characterized in that the tin indium oxide. The method of claim 3, wherein
The transparent conductive film is a conductive multilayer structure, characterized in that the amorphous tin indium oxide. The method of claim 1,
Wherein the thickness of the hard coat layer is between 6 μm and 10 μm. The method of claim 1,
And said protective layer is a silica membrane layer. The method according to claim 6,
Wherein the thickness of the protective layer is between 1 μm and 4 μm. A touch panel comprising a conductive multilayer structure according to claim 1. The method of claim 8,
The thickness of the hard coating layer of the conductive multilayer structure is between 6μm and 10μm touch panel. The method of claim 8,
And the protective layer is a silicon dioxide film layer, the thickness of which is between 1 μm and 4 μm.

Images