TECHNICAL FIELD

The present invention relates to a conductive pattern, and more particularly, to a conductive pattern capable of improving conductivity and preventing an electrical disconnection error from occurring due to cracks.

BACKGROUND ART

Recently, a touch panel has been applied to various electronic products, through which a user input is input by touching an image displayed on a display device with a finger or an input device such as a stylus.

Such touch panels may be largely divided into a resistive-film type touch panel and a capacitive touch panel. A touched position on the resistive-film type touch panel is detected as glass and an electrode are shorted by pressure applied by an input device. A touched position on the capacitive touch panel is detected by sensing a change in a capacitance between electrodes, caused when the touch pad is touched by a finger.

As the resistive-film type touch panel is repeatedly used, the performance of the touch panel may be lowered and the touch panel may be scratched. Thus, much attention has been paid to capacitive touch panels having high durability and long lifetime.

The capacitive touch panel is defined as having an effective region into which a touch command may be input and an ineffective region outside the effective region. In the effective region, an electrode pattern is formed of a transparent conductive material to transmit light from a display device.

Conventionally, the electrode pattern is formed of an indium-tin oxide (ITO). The ITO is limited in terms of a high sheet resistance, high manufacturing costs, and imbalance between the supply and demand of indium in a raw material market. Furthermore, the ITO is not available for a flexible display apparatus which is a recent trend.

Recently, research has been conducted on a transparent electrode material such as silver nanowire which may replace the ITO.

FIG. 1is a diagram illustrating a transparent electrode formed of conventional silver nanowires.

Referring toFIG. 1, a conventional transparent conductive sheet A includes silver nanowires NW. The silver nanowires NW are limited in terms of an aspect ratio and are manufactured having a small diameter of about 100 nm to achieve high transmissivity. Thus, the silver nanowires NW having a relatively small length of 5 um to 10 um are applied to a transparent conductive sheet A.

A transparent electrode B is formed by patterning the transparent conductive sheet A according to a certain width. The transparent electrode B includes a plurality of silver nanowires NW. The silver nanowires NW of the transparent electrode B are short and thus many disconnections occur between the silver nanowires NW, thereby lowering conductivity.

Furthermore, the transparent electrode B is disadvantageous in that it may be electrically open due to cracks occurring due to external shocks.

DISCLOSURE

Technical Problem

The present invention is directed to a conductive pattern capable of improving conductivity while maintaining optical transmissivity.

The present invention is also directed to a conductive pattern capable of reducing manufacturing costs.

The present invention is also directed to a conductive pattern capable of preventing cracks from occurring and preventing electrical disconnection from occurring even when cracks occur,

Aspects of the present invention are not limited thereto, and additional aspects will be apparent to those of ordinary skill in the art from the following description and the appended drawings.

Technical Solution

One aspect of the present invention provides a conductive pattern having at least one unit conductive pattern forming one touch pixel. The at least one unit conductive pattern includes a plurality of nanostructures each having opposite ends. A ratio of nanostructures, both opposite ends of which are in contact with edges of the at least one unit conductive pattern to all nanostructures included in the at least one unit conductive pattern is 70% or more.

Advantageous Effects

According to the present invention, a ratio of nanostructures, opposite ends of which intersect side surfaces of a conductive pattern to all nanostructures of the conductive pattern may be set to be high so as to increase the number of intersection regions between the nanostructures, thereby increasing conductivity.

According to the present invention, intersecting nanostructures of the conductive pattern may be electrically connected to each other during removing of a polymer. Accordingly, an additional process may be skipped and thus manufacturing costs may be reduced.

According to the present invention, a ratio of nanostructures, opposite ends of which intersect side surfaces of connection parts to nanostructures of the connection parts in which cracks are likely to occur may be set to be high. Thus, the occurrence of cracks may be reduced, and an electrical disconnection error may be prevented from occurring even when cracks occur.

Effects of the present invention are not, however, limited thereto, and additional effects will be apparent to those of ordinary skill in the art from the following description and the appended drawings.

