OGS Touch Panel Vanishing Layer Design
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Solution Overview
Problem
The existing manufacturing processes for one glass solution (OGS) capacitive touch screens face challenges with high production costs and yield issues due to the need for high-temperature sputtering of ITO layers and inadequate vanishing effects of traditional vanishing layers made of SiO2 and Nb2O5, leading to potential planarization layer detachment.
Innovation Solution
A method involving the formation of a non-opaque film layer with a micro-pattern on a transparent substrate, followed by the deposition of an ITO electrode within a low temperature range (200° C. to 250° C.), which simplifies the process and enhances the vanishing effect by using an optical anti-reflection film layer to control haze, diffusion, and concealment of the electrode shadow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If high-temperature sputtering (about 280°C) is used to form the ITO layer, then the ITO layer has high degree of crystallization and good vanishing effect, but the planarization layer is prone to falling off and high temperature resistance of the ink is highly demanded
Solution Approach 1:
The patent changes the temperature parameter from high-temperature sputtering (280°C) to low-temperature sputtering (200-250°C), which resolves the contradiction by achieving satisfactory vanishing effect without causing planarization layer detachment, thus improving both manufacturing precision and reliability simultaneously
2Manufacturing precision
If traditional vanishing layer made of SiO2 and Nb2O5 is used, then the vanishing effect is limited by the degree of crystallization of ITO, but the process complexity and production cost are increased
Solution Approach 1:
The patent extracts and eliminates the traditional vanishing layer (SiO2 and Nb2O5) from the manufacturing process, using the ITO layer itself to achieve the vanishing effect through low-temperature sputtering. This simplifies the process structure while maintaining or improving the vanishing effect
Solution Approach 2:
The patent merges the function of the vanishing layer with the ITO layer itself. By using the ITO layer to directly achieve the vanishing effect through low-temperature sputtering, the separate vanishing layer is eliminated, reducing process complexity while maintaining the vanishing function
3Ease of manufacture
If low-temperature sputtering (200°C to 250°C) is used to optimize process conditions, then the production cost is reduced, but the vanishing effect is not sufficient due to the degree of crystallization of ITO
Solution Approach 1:
The patent optimizes the temperature parameter within the low-temperature range (200-250°C) to achieve both cost reduction and satisfactory vanishing effect, resolving the contradiction between ease of manufacture and manufacturing precision
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 reduces production costs, improves the vanishing effect, and prevents planarization layer detachment, while eliminating the need for traditional vanishing layers, thereby simplifying the manufacturing process and enhancing the performance of OGS capacitive touch panels.
Implementation Method 1
the non-opaque film layer with the micro-pattern is formed on the transparent substrate... configured to vanish a shadow of the touch panel electrode
Implementation Method 2
the non-opaque film layer is an optical anti-reflection film layer
Implementation Method 3
sputtering an ITO layer onto the vanishing layer at a high temperature... a process of sputtering the ITO layer at a low temperature
Data Source
AI summary
The present disclosure provides a method for manufacturing a touch panel, the touch panel, a touch screen and a display device. The method includes steps of: forming, on a transparent substrate, a non-opaque film layer with a micro-pattern; and forming a touch panel electrode on the non-opaque film layer. The non-opaque film layer is configured to vanish a shadow of the touch panel electrode.