Touch Input Device Laser-Etched Electrodes Vibration Resistance
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Solution Overview
Problem
Conventional touch input devices rely on adhesive or bonding methods, making them vulnerable to external vibrations, heat, and increasing production costs due to the use of rare materials like indium tin oxide, which complicates the manufacturing process and reduces durability.
Innovation Solution
A touch input device is manufactured using laser processing to form electrodes without adhesives or bonding, featuring a first and second base with pattern grooves and sense patterns made of conductive materials, connected via a line unit, and a controller to interpret capacitance signals, eliminating the need for adhesives and simplifying the fabrication process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If adhesive or bonding methods are used to form electrode patterns, then the touch input device can be manufactured using conventional processes, but the device becomes vulnerable to external vibrations and heat, reducing durability
Solution Approach 1:
The patent removes the adhesive layer from the electrode structure, extracting the problematic bonding component that causes vulnerability to vibration and heat. The electrode pattern is formed directly on the substrate without adhesive, eliminating the source of durability issues while maintaining electrical functionality.
Solution Approach 2:
The patent replaces the mechanical adhesive bonding system with a direct deposition or printing system. Instead of using chemical adhesives to bond electrode patterns, the conductive material is directly applied to the substrate surface, eliminating mechanical stress points and chemical degradation risks associated with adhesives.
2Reliability
If indium tin oxide (ITO) film is used as transparent electrode, then the touch panel can achieve good electrical properties, but the production cost greatly increases due to use of high-priced materials
Solution Approach 1:
The patent replaces expensive ITO materials with cheaper alternative conductive materials such as metal nanoparticles, conductive polymers, or metallic inks. These cost-effective materials achieve sufficient electrical conductivity for touch sensing applications without requiring rare and expensive oxides.
Solution Approach 2:
The patent changes the material composition parameters by substituting ITO with alternative conductive materials having different electrical, optical, and mechanical properties. This parameter change enables cost reduction while maintaining acceptable performance through optimized material selection and deposition parameters.
3Ease of manufacture
If conventional fabrication processes with multiple steps are used, then the touch input device can be manufactured with established technology, but the manufacturing process becomes complicated and expensive
Solution Approach 1:
The patent merges multiple fabrication steps into a single integrated process. The electrode pattern formation, substrate preparation, and protective layer application are combined into one continuous manufacturing flow, eliminating intermediate handling steps and reducing overall process complexity.
Solution Approach 2:
The patent develops a universal manufacturing platform that can produce different touch input device configurations using the same core process. The direct deposition method serves multiple functions including pattern formation, material deposition, and surface treatment, reducing the need for specialized equipment and processes for each device type.
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, enhances durability by avoiding adhesive-related vulnerabilities, and allows for the creation of touch input devices that can withstand vibrations and high temperatures, while maintaining effective capacitance detection for accurate touch input recognition.
Implementation Method 1
a first pattern groove formed over one surface of the first base; a first sense pattern formed over the first pattern groove and including a conductive material
Implementation Method 2
configured to include a metal compound; a first pattern groove formed over one surface of the first base
Data Source
AI summary
A touch input device and a method for manufacturing the same are disclosed. The touch input device includes: a first base including a metal compound; a first pattern groove formed over one surface of the first base; a first sense pattern formed over the first pattern groove and including a conductive material; a second base stacked over the first base, and configured to include a metal compound; a second pattern groove formed over one surface of the second base; a second sense pattern formed over the second pattern groove, including a conductive material, and spaced apart from the first sense pattern; and a line unit connecting the first sense pattern and the second sense pattern to an integrated-circuit.