Capacitive touch screen, manufacturing method thereof, and touch display device

Abstract

The invention discloses a capacitive touch screen and a manufacturing method of the capacitance touch screen and a touch display screen, and relates to the field of displaying. Pattern clearances of a transparent conducting layer can be reduced, and then surface visual effects are improved. The capacitive touch screen comprises a transparent substrate and a patterned transparent conducting layer, the transparent conducting layer comprises a first sense line extending along a first direction and a second sense line extending along a second direction, wherein the first sense line is maintained continuous in the first direction and is a cluster of electrodes which are connected in sequence, the second sense line comprises a plurality of independent electrodes which are separated from one another, and the independent electrodes are connected with one another through bridging the first sense line. The gaps between the electrodes in the first sense line and the independent electrodes of the second sense line are not filled with any material or filled with transparent insulating material, wherein the dielectric constant of the transparent insulating material is larger than or equal to 1 and less than 3.5, so that the width of the gaps can be reduced on the premise that touch sensitivity is not affected.

Description

technical field [0001] The invention relates to the display field, in particular to a capacitive touch screen, a manufacturing method thereof, and a touch display device. Background technique [0002] Touch-screen liquid crystal displays are developing rapidly and have gradually developed into mainstream flat-panel displays. From the perspective of technical principles, touch screen liquid crystal displays can be divided into five basic types: vector pressure sensing, resistive sensing, capacitive sensing, infrared sensing and surface acoustic wave sensing. , Embedded (Oncecellmode) and integral (Incellmode) three types. [0003] A common external capacitive touch screen such as figure 1 As shown, the transparent substrate 10 is sequentially provided with: a metal layer 11, an insulating layer 12, a transparent conductive layer 13 and a transparent surface protection layer 14, which require 4 photolithography (4Mask) process preparations, including: the first The first st...

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Problems solved by technology

[0005] The surface protection layer 14 covers the entire transparent electrode layer 13, therefore, the pattern gap of the transparent conductive layer 13, that is, the gap between the electrodes of the first sensing line 131 and the electrodes of the second sensing line 132, will also fill the upper surface protection layer. layer 14, because the surface protection layer 14 generally chooses SiN x or SiO 2 , or resin material, the dielectric constant is large, and considering the limitation of touch sensitivity on capacitance, the width of the pattern gap of the existing transparent conductive layer is at least about 0.03mm, and the human eye can clearly see the pattern gap, affecting the surface Visual effects

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