Capacitive Touch Panel Intaglio Electrode Alignment
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Solution Overview
Problem
Capacitive touch panels using ITO electrodes face issues with poor touch sensitivity, high manufacturing costs, and visibility due to complex photo etching processes and inaccurate alignment in screen-printing processes, making them unsuitable for large areas and economically feasible.
Innovation Solution
A capacitive touch panel with an intaglio micro pattern formed by an imprinting process, featuring a conductive layer with low resistance, where sensing and wiring electrodes are formed simultaneously on a resin layer laminated on a transparency substrate, improving touch sensitivity and optical transmittance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If photo etching process is used to form ITO transparency electrode pattern, then manufacturing precision is improved, but device complexity and manufacturing cost increase
Solution Approach 1:
The patent extracts the photolithography step from the manufacturing process and replaces it with an imprinting process that directly forms the intaglio pattern on the resin layer, eliminating the need for photo etching while maintaining pattern precision
Solution Approach 2:
The patent replaces the photochemical etching process with a mechanical imprinting process where a mold is pressed into the resin layer to form the intaglio pattern, substituting chemical processes with a mechanical approach that achieves similar precision
2Ease of manufacture
If screen-printing process is used to form electrode pattern, then manufacturing cost is reduced, but manufacturing precision deteriorates
Solution Approach 1:
The patent performs preliminary action by forming the intaglio pattern on the resin layer before depositing the conductive material, ensuring precise pattern definition is established beforehand, which maintains alignment accuracy while using a simpler subsequent deposition process
3Illumination intensity
If ITO transparency electrode is used for capacitive touch screen, then optical transmittance is improved, but touch sensitivity deteriorates
Solution Approach 1:
The patent transitions from planar electrodes to three-dimensional intaglio patterns with vertical depth, creating sensing regions at multiple levels that enhance touch sensitivity while maintaining optical transmittance through the transparent substrate and resin layer structure
Solution Approach 2:
The patent uses a composite structure combining transparent resin material with conductive materials in the intaglio regions, creating a multi-functional layer that provides both optical clarity and enhanced electrical sensing capability
4Illumination intensity
If ITO material is used for electrode, then optical property is improved, but manufacturing cost increases
Solution Approach 1:
The patent replaces expensive ITO material with cheaper conductive materials such as conductive polymers or metal particles that can be deposited in the intaglio regions, using cost-effective materials while maintaining the necessary electrical and optical properties
Data Source
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AI summary
The present invention relates to a capacitive touch panel and a method for manufacturing the same, in which the material having lower resistance than that of ITO is filled in the intaglio formed on the resin layer, which is patterned to form the embedded sensing electrode and the sensing electrodes and the wiring electrodes are formed at the same time by using the same resistance material; in which the capacitive touch panel includes a first sensing layer formed with a plurality of first direction sensing electrodes, which are patterned and a plurality of first wiring electrodes; and a second sensing layer formed with a plurality of second direction sensing electrodes, which are patterned and a plurality of second wiring electrodes; in which the first sensing layer and the second sensing layer are bonded in the mutual vertical direction.