Display Panel Touch Electrode Mask Process Reduction
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Solution Overview
Problem
The complex manufacturing process of low temperature poly-silicon (LTPS) capacitive touch panels requires more than ten layers and numerous mask processes, leading to increased production time and cost.
Innovation Solution
A display panel structure featuring an array substrate with first and second common electrodes and touch electrode wires formed on the same metal layer by a single mask process, reducing the number of masks and manufacturing time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If multiple layers and mask processes are used to form touch electrodes and common electrodes separately, then the manufacturing precision and structural reliability are improved, but the device complexity and manufacturing time increase
Solution Approach 1:
The patent combines the formation of the second common electrode and the first touch electrode wire into a single metal layer using one mask process. This merging of previously separate manufacturing steps reduces the total number of mask processes from multiple to just one, while still achieving the required manufacturing precision through proper pattern design in the single mask layer.
2Reliability
If multiple separate manufacturing steps are used for different electrode layers, then the structural reliability is improved, but the productivity decreases
Solution Approach 1:
The patent merges the manufacturing of the second common electrode and first touch electrode wire into a single step by forming them in the same metal layer through one mask process. This significantly increases productivity by reducing the number of sequential manufacturing steps, while reliability is maintained through proper via hole connections to the first common electrode below.
3Manufacturing precision
If more mask processes are applied, then the manufacturing precision is improved, but the loss of time and increased cost occur
Solution Approach 1:
The patent consolidates the patterning of the second common electrode and first touch electrode wire into a single mask process. This merging eliminates the time required for multiple sequential mask applications, reducing the manufacturing cycle time while maintaining precision through optimized pattern design in the unified mask layer.
Data Source
AI summary
A display panel and a display device are provided for which the first touch electrode wires and pixel electrodes are formed by the same mask process. Furthermore, the first touch electrode wires are disposed on the same layer as the second common electrode. Thus, the number of masks is reduced while the duration and the cost of the manufacturing process are reduced.