Low-impedance electrically-controlled line for touch panel, and manufacturing method for low-impedance electrically-controlled line

Abstract

The invention discloses a low-impedance electrically-controlled line for a touch panel, and a manufacturing method for the low-impedance electrically-controlled line. The following sequential steps are performed on an indium tin oxide electrically-controlled line: covering a visible region, preprocessing, chemically electroplating electroless nickel, thermally annealing and chemically electroplating replacement gold. By using the steps of chemically electroplating the electroless nickel and chemically electroplating the replacement gold, the indium tin oxide electrically-controlled line is thickened, so that a low-impedance electrically-controlled line structure with a special coating thickness is manufactured; therefore, the resistance value of the surface is reduced, so a touch signal is difficult to lose, deform and distort; furthermore, the indium tin oxide electrically-controlled line for reducing the impedance value is refined; the surface of the indium tin oxide electrically-controlled line can not be oxidized easily to influence a combined attachment surface in the subsequent steps; and moreover, by the method for manufacturing the structure, the manufacturing cost can be lowered.

Description

technical field [0001] The present invention relates to a structure of a touch panel and a manufacturing method thereof, more particularly to a low-impedance electronic control circuit structure and its manufacture for reducing the impedance of an electronic control circuit formed by an ITO transparent conductive layer in a touch panel method. Background technique [0002] With the evolution of touch technology, touch human-machine interface, such as: touch panel (Touch Panel), has been widely used in various electronic products to replace traditional input devices (such as: keyboard and mouse, etc.), which is convenient for users to manipulate and browse data. [0003] Touch panels can generally be divided into soft and hard panels. A hard panel uses a glass substrate and a transparent conductive layer formed on it to form a lower transparent conductive plate, and the upper transparent conductive plate is a transparent conductive film. , the electric control circuit used ...

AI Technical Summary

Problems solved by technology

[0004] Traditionally, through the exposure / development / etching process of the transparent conductive layer on the substrate, the electrical control circuits around the substrate are formed. However, the surface resistance of these electrical control circuits is about 100Ω / cm2 to 500Ω / cm2, in order to further reduce this high impedance value, it is usually used to increase the thickness of the transparent conductive layer by using methods such as silver offset printing, molybdenum / aluminum / molybdenum sputtering, and copper electroplating / sputtering. A low-impedance electronic control circuit layer is formed on the electronic control circuit to reduce the impedance of the electronic control circuit. However, the known production methods are complex and require a lot of equipment, resulting in increased costs. In addition, these production methods have a limited line width. The manufacturing limit on the pitch, the line width that is shrinking day by day makes the production difficulty increase and the yield rate decreases. This is because under these production methods, the line is prone to uneven impedance, disconnection, or contact with adjacent lines. In the event of a short circuit, etc.

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