Silver Nano-Wire Touch Panel Dual Protective Layer Design
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Solution Overview
Problem
The existing touch panel manufacturing methods face challenges with the thickness of protective layers, as layers that are too thick hinder etching solution penetration, while those that are too thin compromise antioxidation and adhesion, affecting yield rates.
Innovation Solution
A touch panel design featuring a silver nano-wire electrode layer with a first protective layer of suitable thickness for etching solution penetration and a second protective layer for enhanced adhesion and antioxidation, along with connecting holes for improved etching and electrical connectivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the protective layer is made thick to enhance antioxidation ability, then the antioxidation performance is improved, but the etching solution penetration becomes difficult
Solution Approach 1:
The protective layer is divided into two separate layers: a first protective layer with thickness of 50-200nm that allows etching solution penetration, and a second protective layer with thickness of 200-500nm that provides antioxidation protection. This segmentation resolves the contradiction by assigning different functional requirements to different layers.
Solution Approach 2:
Different regions of the protective structure have different thicknesses and properties. The first protective layer has thinner thickness optimized for etching penetration, while the second protective layer has greater thickness optimized for antioxidation. Each local region is optimized for its specific function.
2Ease of manufacture
If the protective layer is made thin to facilitate etching solution penetration, then the etching process is improved, but the antioxidation ability and adhesion are reduced
Solution Approach 1:
The protective function is segmented into two layers with different thicknesses. The first layer is thin (50-200nm) to allow etching penetration, while the second layer is thick (200-500nm) to provide antioxidation protection, thus resolving the contradiction between etching ease and antioxidation ability.
Solution Approach 2:
The solution moves from a single-dimensional thickness parameter to a two-dimensional layered structure. By adding the layer dimension, the system can simultaneously achieve thin thickness for etching penetration in the first layer and thick thickness for antioxidation in the second layer.
3Ease of manufacture
If the protective layer is made thin to improve etching penetration, then the etching process is facilitated, but the adhesion of the silver nano-wire layer to the substrate is reduced
Solution Approach 1:
The protective structure is segmented into two layers where the second protective layer (200-500nm thick) provides sufficient mass and contact area to maintain strong adhesion to the substrate, while the first protective layer remains thin for etching penetration.
Solution Approach 2:
The dual-layer protective structure acts as a composite system where each layer contributes different properties: the first layer provides etching accessibility while the second layer provides mechanical strength and adhesion, achieving overall performance that neither layer could provide alone.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach allows for effective etching of silver nano-wire layers, enhances adhesion and antioxidation, and improves yield rates by ensuring the protective layers are neither too thick nor too thin, thereby stabilizing the touch panel's performance.
Implementation Method 1
an etching solution in an etching process would be more difficult to seep through the protective layer so as to etch silver nano-wires
Implementation Method 2
the protective layer 120 may isolate a part of air and promote antioxidation ability of the silver nano-wire layer 110
Data Source
AI summary
Present invention discloses a touch panel and a manufacturing method thereof, the touch panel comprises: a substrate; a silver nano-wire electrode layer provided on the substrate comprising a connecting area and a non-connecting area; a first protective layer provided on silver nano-wire electrode layer having a first hole corresponding to connecting area; a second protective layer provided on first protective layer having a second hole corresponding to position of first hole; and a connecting wire provided on second protective layer connected to silver nano-wire electrode layer in connecting area through second hole and first hole. With the touch panel, the problem that etching solution can't seep when a single protective layer is too thick and the problem that a silver nano-wire layer is easily oxidized and the adhesion of the silver nano-wire layer is poor when a single protective layer is too thin can be avoided.