Electrostatic Printing Method for Capacitive Touch Panels
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Solution Overview
Problem
Current electrostatic printing methods face challenges in achieving high-definition electrostatic patterns on insulators other than photoconductors, leading to reduced resolution and sensitivity issues in capacitive touch panels, as well as limitations in mass production and pattern accuracy for electronic components.
Innovation Solution
An electrostatic printing method using an image receiving sheet with a laminated conductive layer and an original plate with built-in letterpress, intaglio, or gravure patterns, applying voltage to form patterns without separating discharge, and employing mask sheets with ion-permeable openings for precise pattern formation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If electrostatic pattern is transferred from photoconductor using conventional electrophotographic method, then high-speed printing is achieved, but resolution decreases during transfer and conductive toner cannot be transferred except by adhesion
Solution Approach 1:
The invention creates direct electrostatic patterns on insulator substrates without using photoconductors or toner transfer. By applying ion beams through masks directly onto the insulator surface, the pattern is copied directly in its final form, eliminating the resolution-degrading transfer step while maintaining high-speed production capability
Solution Approach 2:
The invention replaces the mechanical toner transfer process with direct ion beam deposition. Instead of mechanically transferring toner particles that suffer from adhesion limitations and resolution loss, ion beams directly create the electrostatic pattern on the insulator surface, enabling both high resolution and compatibility with conductive materials
2Ease of manufacture
If multi-stylus or ion beam deflecting methods are used to directly draw electrostatic patterns, then plate-free printing is achieved, but electrode processing accuracy is limited and resolution is low due to ion spread
Solution Approach 1:
The invention introduces masks as intermediaries between the ion source and the insulator substrate. These masks physically define the pattern boundaries, preventing ion spread and achieving high resolution. The masks enable plate-free printing while maintaining manufacturing precision by serving as the pattern-defining element rather than relying on ion beam deflection accuracy
3Device complexity
If image receiving sheet has integral conductive layer adhered onto original plate, then electrostatic pattern formation is simplified, but sensitivity of capacitive touch panel is reduced and thickness cannot be reduced
Solution Approach 1:
The invention segments the conductive layer from the image receiving sheet, allowing the electrostatic pattern to be formed on the insulator surface without the conductive layer interfering with touch panel sensitivity. The conductive layer can be separately applied or omitted, enabling thin design while maintaining simplified pattern formation through the mask-based ion beam method
4Manufacturing precision
If conventional electrophotographic method is used with photoconductor, then high-definition electrostatic patterns can be created, but it is difficult to accurately print dots and lines of different sizes at the same time at high speed
Solution Approach 1:
The invention changes the fundamental parameters of the electrostatic pattern formation process by using ion beams and masks instead of photoconductors and light. This allows direct writing of patterns with precise control over dot and line dimensions, enabling accurate printing of different sized features at high speed without the analog characteristics that limit conventional electrophotography
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 method enables high-definition electrostatic pattern formation without ion spread, allowing for thinner capacitive touch panels and precise electrode circuit patterns, suitable for mass production and individual pattern modifications.
Implementation Method 1
mask sheet having predetermined ion-permeable openings
Implementation Method 2
applying an appropriate voltage sufficient to discharge the gap of the letterpress, intaglio plate, or gravure plate pattern between the first electrode of the original plate and the second electrode of the image receiving sheet to form an electrostatic pattern
Data Source
AI summary
The electrostatic printing method of the present invention comprises arranging and adhering an original plate which is composed of an electrode and a plate layer having built-in a letterpress, intaglio plate, or gravure plate pattern or a mask sheet having ion-permeable openings on one or both sides of an image receiving sheet having an electrode and an image receiving layer, and forming a predetermined electrostatic pattern on the image receiving layer of the image receiving sheet by applying a voltage between the electrode of the original plate and the electrode of the image receiving sheet or by performing ion irradiation through the mask sheet.