Fine Pattern Formation Using High-Voltage Micrometer Electrode Spacing
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Solution Overview
Problem
Existing electrohydrodynamic patterning techniques face challenges in controlling nanoscale spacing between electrodes, leading to non-uniform pattern replication, structural damage, and limited aspect ratio, which restricts the application of these methods in industrial settings.
Innovation Solution
An apparatus and method utilizing a high-voltage electric field with micrometer-scale spacing between electrodes, allowing for controlled electrohydrodynamic instability to form uniform fine patterns over large areas, preventing contact between master and replicated patterns, and enabling high aspect ratio replication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If nanoscale spacing between electrodes is used in electrohydrodynamic patterning, then pattern resolution is improved, but spacing control difficulty and pattern uniformity worsen
Solution Approach 1:
The patent changes the voltage parameter from conventional low voltage to high voltage (several kilovolts), which enables the use of micrometer-scale spacing instead of nanoscale spacing while maintaining strong electrohydrodynamic effects for high-resolution pattern formation
Solution Approach 2:
The patent transitions from nanoscale to micrometer-scale spacing dimension, changing the order of magnitude of the electrode spacing parameter to achieve both ease of control and high pattern resolution
2Manufacturing precision
If nanoscale spacing between electrodes is used, then pattern resolution is improved, but pattern uniformity over large area worsens
Solution Approach 1:
By changing the spacing parameter from nanoscale to micrometer-scale, the system achieves better uniformity over large areas while maintaining high resolution through high voltage application
Solution Approach 2:
The patent uses excessive voltage (several kilovolts) to compensate for the larger micrometer-scale spacing, ensuring that the electrohydrodynamic effect remains strong enough to produce high-resolution patterns uniformly across large areas
3Speed
If nanoscale spacing is used to achieve strong electric field, then pattern formation speed is improved, but structural damage and aspect ratio limitation worsen
Solution Approach 1:
The patent changes the voltage parameter to high voltage (several kilovolts) which maintains fast pattern formation speed while using micrometer-scale spacing that prevents structural damage and enables high aspect ratio replication
Solution Approach 2:
The patent dynamically balances the electric field strength through high voltage application at micrometer spacing, achieving rapid pattern growth without the structural damage that occurs in conventional nanoscale spacing systems
4Ease of operation
If micrometer-scale spacing with high voltage is used, then spacing control and pattern durability are improved, but applied voltage requirement increases
Solution Approach 1:
The patent accepts higher voltage requirements as a necessary parameter change to achieve the benefits of micrometer-scale spacing, including improved spacing control, pattern uniformity, and master pattern durability
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
The method achieves rapid and uniform pattern growth across the entire thin-film area, improving replicator fidelity and durability of master patterns, and enabling applications in nanostructure-based devices such as antifouling surfaces and energy harvesting devices.
Implementation Method 1
a method that utilizes the electrohydrodynamic instability of a thin film surface has remarkable technological advantages. This technique utilizes the instability induced in the fluidic thin film surface to which a strong electric field (>10 V/m) is applied to achieve structure formation
Implementation Method 2
The total free energy, which is excessively increased by the electric field, is lowered by the work for the deformation of the thin film surface in the system. At this time, the deformation of the thin film surface can be controlled in different ways based on the spatial distribution of the electric field intensity
Data Source
AI summary
Disclosed are an apparatus and method for forming a fine pattern. The apparatus for forming the fine pattern includes a lower electrode disposed on a bottom face of a fluid thin-film; an upper electrode positioned above the lower electrode, and spaced apart from the lower electrode by a first spacing, wherein a master pattern is formed on a bottom face of the upper electrode; and a power device configured to apply a high-voltage to between the lower electrode and the upper electrode, thereby generating an electric field therebetween.