Touch module

Abstract

The invention relates to the technical field of touch control, and provides a touch control module which comprises a substrate, a first touch control sensing layer, a metal wiring layer and a transparent conducting layer. The substrate is provided with a visible area and a peripheral area located around the visible area. The first touch sensing layer extends from the visible area of the substrate to the peripheral area. The metal wiring layer is located in the peripheral area of the substrate and transversely separated from the first touch sensing layer. The transparent conductive layer is located in the peripheral area of the substrate and is provided with a first part and a second part, the first part is in contact with the first touch sensing layer, and the second part is in contact with the metal wiring layer. According to the touch module, electrical connection of the peripheral area is achieved through lap joint between the transparent conductive layer and the metal wiring layer, so that electrochemical reaction generated during lap joint can be avoided, lap joint impedance is reduced, and the narrow frame requirement of the touch module is met.

Description

technical field [0001] The invention relates to the field of touch technology, in particular to a touch module with low overlapping impedance. Background technique [0002] In recent years, with the continuous development of touch technology, transparent conductors are often used in many display or touch-related devices because they can simultaneously allow light to pass through and provide appropriate conductivity. Generally speaking, the transparent conductor can be various metal oxides, such as indium tin oxide (Indium Tin Oxide, ITO), indium zinc oxide (Indium Zinc Oxide, IZO), cadmium tin oxide (Cadmium Tin Oxide, CTO) or aluminum-doped Zinc oxide (Aluminum-doped Zinc Oxide, AZO). However, thin films made of these metal oxides cannot meet the flexibility requirements of display devices. Therefore, a variety of flexible transparent conductors have been developed, for example, transparent conductors made of materials such as metal nanowires. [0003] However, there are...

AI Technical Summary

Problems solved by technology

However, since the metal nanowires are distributed in the touch electrodes in the form of filaments, the contact area between them and the metal traces is small, and the bonding resistance between the touch electrodes and the metal traces cannot be reduced.

On the other hand, since the electrochemical reaction (for example, ion redox reaction) often occurs spontaneously between the metal nanowire and the metal wiring, the metal wiring is easily oxidized and causes a gap between the touch electrode and the metal wiring. The increase of the lap resistance of the touch panel leads to a larger lap area to reduce the lap resistance between the touch electrode and the metal trace, which is not conducive to the realization of the narrow frame requirement of the touch module, and easily leads to insufficient reliability of the product

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