Touch Screen Electrode Hollow Pattern for Gas Release

Solution Overview

Problem

Existing touch screens face issues with the touch electrode peeling off during high temperature processes due to gas release from organic insulating layers, leading to electrical communication disruptions and reduced yield rates.

Innovation Solution

Incorporating a hollow pattern in the peripheral area of the touch electrode layer, which allows the organic insulating layer to be partially exposed, creating an exhaust channel for gas release and preventing peeling, while maintaining electrical communication through transverse and longitudinal strips or mesh patterns.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the touch electrode layer is made continuous and complete, then electrical communication is maintained, but gas release during high temperature processes causes peeling off

Engineering Contradiction:

Improveelectrical communicationVSAvoidtouch electrode layer adhesion

Core Design Contradiction:

ReliabilityVSStability of the object's composition

Solution Approach 1:

The touch electrode layer is segmented to form a hollow pattern with multiple strips or mesh structures in the peripheral area, creating exhaust channels for gas release while maintaining electrical communication through the strip or mesh connections

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The hollow pattern is applied locally only in the peripheral area where the touch electrode layer overlaps with the organic insulating layer, while the central display area maintains a continuous sheet shape to preserve electrical communication and prevent peeling

Inventive Principle:

Principle #3Local quality

2Object-generated harmful factors

If the touch electrode layer is modified with hollow patterns, then gas release is facilitated, but structural complexity increases

Engineering Contradiction:

Improvegas releaseVSAvoidtouch electrode layer structure

Core Design Contradiction:

Object-generated harmful factorsVSDevice complexity

Solution Approach 1:

The touch electrode layer is segmented to form a hollow pattern with multiple strips or mesh structures in the peripheral area, creating exhaust channels for gas release while maintaining electrical communication through the strip or mesh connections

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The hollow pattern is applied locally only in the peripheral area where the touch electrode layer overlaps with the organic insulating layer, while the central display area maintains a continuous sheet shape to preserve electrical communication and prevent peeling

Inventive Principle:

Principle #3Local quality

3Stability of the object's composition

If the hollow pattern is formed in the peripheral area, then peeling is prevented, but manufacturing precision requirements increase

Engineering Contradiction:

Improvetouch electrode layer adhesionVSAvoidhollow pattern formation

Core Design Contradiction:

Stability of the object's compositionVSManufacturing precision

Solution Approach 1:

The hollow pattern is formed in advance during the touch electrode layer fabrication process, before subsequent high temperature processing steps, to pre-establish exhaust channels that will prevent peeling during later thermal cycles

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The hollow pattern is applied locally only in the peripheral area where the touch electrode layer overlaps with the organic insulating layer, while the central display area maintains a continuous sheet shape to preserve electrical communication and prevent peeling

Inventive Principle:

Principle #3Local quality

Data Source

PatentUS10545617B2Touch screen and fabricating method thereof and touch device

Publication Date: 2020.01.28 BOE TECHNOLOGY GROUP CO LTD

AI summary

A touch screen and a fabricating method thereof and a touch device are provided. The touch screen comprises a substrate, a touch electrode layer positioned above the substrate, and an organic insulating layer positioned beneath the touch electrode layer. At least a peripheral area of the touch electrode layer comprises a hollow area having a hollow pattern. The hollow area is at least arranged in an area where the peripheral area overlaps with the organic insulating layer. The hollow pattern allows the organic insulating layer to be partially exposed and allows the touch electrode layer to maintain electrical communication. The fabricating method of the touch screen comprises forming an organic insulating layer above a substrate and forming a touch electrode layer above the organic insulating layer.