Touch Panel Double-Layer Traces With Break Points For Short-Circuit Isolation
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Solution Overview
Problem
Touch panels face challenges in maintaining signal transmission integrity due to short-circuit issues between adjacent conductive lines, which affect the yield and reliability of the panel.
Innovation Solution
A touch panel design featuring double-layer conductive lines with break points and a trace insulating layer allows for isolation of short-circuit points by cutting off one layer of conductive lines, ensuring signal transmission paths and improving yield.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If single-layer conductive lines are used, then device complexity is reduced, but short-circuit issues between adjacent traces occur affecting reliability
Solution Approach 1:
The patent transitions from a single-layer conductive line structure to a double-layer stacked structure. The first conductive line and second conductive line are arranged in different layers (first layer and second layer respectively), with insulating layers between them. This dimensional change from 2D plane to 3D stacked arrangement effectively prevents short-circuits between adjacent traces while maintaining signal transmission integrity.
Solution Approach 2:
The conductive line is segmented into two separate layers: the first conductive line in the first layer and the second conductive line in the second layer. Each layer is independently patterned and connected through vias, allowing the structure to avoid short-circuits by separating adjacent traces in the vertical dimension while maintaining horizontal connectivity where needed.
2Reliability
If break points are introduced in conductive lines, then short-circuit isolation is enabled, but manufacturing precision requirements increase
Solution Approach 1:
Break points are pre-designed and pre-formed in the conductive lines during the manufacturing process. The first break point in the first conductive line and the second break point in the second conductive line are intentionally positioned at specific locations to enable future short-circuit isolation. This preliminary action ensures that when short-circuits occur, the pre-positioned break points can effectively isolate the affected segments without requiring additional manufacturing steps.
Data Source
AI summary
A touch panel, comprising: a substrate, a plurality of touch electrodes and a plurality of traces disposed on the substrate. At least one trace is connected to at least one touch electrode, and comprises a first conducting wire and a second conducting wire. A trace insulating layer is provided between the first and second conducting wires. The second conducting wire is connected to the first conducting wire by at least one via on the trace insulating layer. First conducting wires of at least two adjacent traces both have at least one break point, so that a first short circuit point between the first conducting wire is isolated from a corresponding second conducting wire; or, second conducting wires of at least two adjacent traces both have at least one break point, so that a second short circuit point between the second conducting wire is isolated from a corresponding first conducting wire.