Touch Panel Electrode Shielding Layer Sequence Inversion
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Solution Overview
Problem
The manufacturing process for capacitive touch panels results in a decrease in the insulating performance of the shielding layer and fluctuation of resistance in the electrode layer due to high-temperature baking, leading to impaired touch panel operation and accuracy.
Innovation Solution
The method involves forming the electrode layer first, extending it to the periphery area to create overlapping electrodes, followed by the deposition of an insulation layer to form a shielding layer, which maintains the insulating performance and avoids resistance fluctuations by ensuring the electrodes are on the same horizon, thus simplifying the process and maintaining the shielding layer's integrity during high-temperature baking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the shielding layer is formed prior to the electrode layer, then the shielding layer can be disposed first, but the insulating performance of the shielding layer decreases due to high-temperature baking
Solution Approach 1:
The patent inverts the conventional manufacturing sequence by forming the electrode layer first and then forming the shielding layer on top of it. This reversal ensures that the shielding layer is not exposed to high-temperature baking that would degrade its insulating performance, while still achieving effective electromagnetic shielding and circuit isolation.
2Ease of manufacture
If the shielding layer is formed prior to the electrode layer, then the shielding layer can be disposed first, but the resistance of the electrode layer fluctuates affecting touch detection accuracy
Solution Approach 1:
By inverting the formation sequence to create the electrode layer first and then the shielding layer, the patent eliminates height differences between the overlapping electrode and sensing electrode. This ensures uniform resistance characteristics across the electrode layer, maintaining accurate touch detection while preserving the shielding function.
3Ease of manufacture
If the electrode layer is formed after the shielding layer, then the shielding layer can be formed first, but the overlapping electrode and sensing electrode have height difference causing resistance fluctuation
Solution Approach 1:
The patent applies sequence inversion by forming the electrode layer first and then depositing the shielding layer material on top. This approach ensures that both the overlapping electrode and sensing electrode are formed at the same horizontal level, eliminating height differences that would cause resistance fluctuations and affecting touch detection precision.
4Ease of manufacture
If the electrode layer is formed after the shielding layer, then the shielding layer can be formed first, but wires of the circuit layer electrically connect to each other
Solution Approach 1:
By reversing the formation sequence to create the electrode layer first and then forming the shielding layer as a circuit board layer above it, the patent ensures that the shielding layer effectively isolates and protects the circuit wires. This sequence prevents electrical connection between wires while maintaining the shielding function against electromagnetic interference.
Data Source
AI summary
The present disclosure provides a manufacturing method for a touch panel comprising: disposing an electrode layer extending from touch area of a substrate to periphery area of the substrate, wherein the periphery area surrounds the periphery of the touch area. The method further includes disposing an insulation layer in the periphery area of the substrate to form a shielding layer, making the shielding layer cover the overlapping electrode in the periphery area and making the electrode layer of the touch area and the overlapping electrode locate on the same layer of the substrate so as to avoid fluctuation of resistance value in the electrode layer due to height difference. Meanwhile, adopting the disposition method also maintains insulating performance of the shielding layer. The present disclosure also provides a touch panel made by the manufacturing method.