Embedded Touch Electrodes Avoiding Etching Refractive Index Issues
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Solution Overview
Problem
The manufacturing process of touch modules often results in uneven refractive indexes due to the removal of conductive material between touch electrodes, affecting the optical consistency of the module.
Innovation Solution
A touch module design where touch electrodes are embedded within a substrate, using a conductive residual material and a bridge to electrically connect them, avoiding the need for an etching process that causes uneven refractive indexes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conductive material is removed by etching process to pattern touch electrodes, then touch electrodes can be isolated from each other, but uneven refractive indexes are caused resulting in poor optical consistency
Solution Approach 1:
The patent extracts the harmful conductive material between touch electrodes through selective removal processes, achieving electrical isolation while maintaining optical consistency. The conductive material is removed from specific regions between electrodes without affecting the overall substrate uniformity, thus solving the contradiction between electrical isolation and optical consistency.
Solution Approach 2:
The patent applies local quality by creating different properties in different regions: the substrate maintains uniform refractive index for optical consistency, while localized conductive material removal provides electrical isolation between electrodes. This local differentiation resolves the contradiction by allowing both optical uniformity and electrical separation to coexist in different spatial zones.
2Reliability
If conductive material is completely removed between electrodes, then electrical isolation is achieved, but substrate uniformity and optical properties are adversely affected
Solution Approach 1:
The patent removes conductive material only in localized regions between electrodes while preserving the overall substrate uniformity. This selective local modification achieves electrical isolation without compromising the global compositional stability and optical properties of the substrate.
Solution Approach 2:
The patent segments the conductive material removal process, removing material only in specific inter-electrode regions rather than uniformly across the entire substrate. This segmented approach maintains substrate uniformity while achieving the necessary electrical isolation between adjacent electrodes.
Data Source
AI summary
A touch module and a manufacturing method thereof are disclosed. The touch module includes a substrate, at least two first touch electrodes, at least two second touch electrodes, at least one conductive residual material, at least one electrode channel, and at least one bridge. The substrate has a first surface and a second surface. The first surface and the second surface are opposite to each other. The conductive residual material is formed on the second surface of the substrate. All of the first touch electrodes, the second touch electrodes, and the electrode channel are embedded in the substrate. The electrode channel is configured to electrically connect the second touch electrodes to each other. The bridge is disposed on the first surface of the substrate, and configured to electrically connect the first touch electrodes to each other. The first touch electrodes are isolated from the second touch electrodes.