Touch Substrate Insulating Layer Design for Oxidation Resistance
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Solution Overview
Problem
The complex structure of one glass solution (OGS) touch screens due to the need for insulating layers around connecting pieces between electrodes leads to potential oxidation and structural defects, complicating the manufacturing process and reducing product quality.
Innovation Solution
A touch substrate design where adjacent first electrode blocks are connected via electrically conductive pieces with an insulating layer covering and exceeding the connecting pieces, and via holes allow electrical connection through the insulating layer, simplifying the structure and reducing the risk of electrode block rupture.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If insulating layers are formed before and after forming the connecting piece to insulate and separate the second electrodes from the connecting piece, then the second electrodes are insulated from the connecting piece, but the structure of the touch screen becomes relatively complex
Solution Approach 1:
The patent extracts the insulating function from the traditional multi-layer insulating structure and concentrates it into a single insulating layer formed after the connecting piece. This single insulating layer is designed to extend beyond the boundaries of the connecting piece, providing both insulation and structural support functions that previously required multiple separate layers.
Solution Approach 2:
The patent merges the insulation function with the structural support function into a single integrated insulating layer. This layer simultaneously prevents electrical contact between the second electrode and connecting piece while also providing mechanical support to the connecting piece, eliminating the need for separate insulating layers before and after the connecting piece.
2Reliability
If insulating layers are formed before and after forming the connecting piece to prevent oxidization of the connecting piece, then the connecting piece is protected from oxidization, but the manufacturing process becomes more complex
Solution Approach 1:
The patent extracts the oxidation protection function from the multi-layer insulating structure and implements it through a single insulating layer formed after the connecting piece. This layer provides both oxidation protection and electrical insulation, simplifying the manufacturing process while maintaining protective functions.
Solution Approach 2:
The connecting piece is formed first, establishing the basic conductive structure. Then the single insulating layer is formed afterward to provide both protection and insulation. This sequence allows the connecting piece to be established before adding protective layers, simplifying the overall manufacturing process compared to forming multiple insulating layers before and after the connecting piece.
3Reliability
If the insulating layer covers the connecting piece and exceeds its border, then the connecting piece is better insulated and protected, but the material consumption increases
Solution Approach 1:
The insulating layer is designed to serve multiple functions simultaneously: electrical insulation, mechanical support, and oxidation protection. By making the layer extend beyond the connecting piece boundaries, it provides structural support that prevents collapse while maintaining insulation effectiveness, eliminating the need for additional support structures that would consume more material.
Solution Approach 2:
The insulating layer has varying thickness and extension in different regions. It extends beyond the connecting piece boundaries where structural support is needed, while maintaining adequate insulation coverage. This localized quality optimization ensures protection and support are provided where needed without uniformly increasing material consumption across the entire structure.
Data Source
AI summary
The present invention provides a touch substrate, comprising a plurality of first electrodes extending along a first direction and a plurality of second electrodes extending along a second direction intersecting with the first direction, wherein the first electrode comprises a plurality of first electrode blocks, the second electrode comprises a plurality of second electrode blocks, adjacent two first electrode blocks are connected via at least one electrically conductive connecting piece, adjacent two second electrode blocks are formed integrally; a connecting piece comprises two contact portions and a connecting portion, the insulating layer at least covers each connecting piece and exceeds border of the connecting piece, the first electrode block is electrically connected to the contact portion via a via hole passing through the insulating layer, and a part of the contact portion is not exposed by the via hole.