Roller Nanoimprint Apparatus Inflatable Support for Seamless Film Transfer
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Solution Overview
Problem
Existing roller nanoimprint technologies face challenges in producing seamless nanostructured films with uniform thickness and high accuracy, as mold rollers with nanostructures are costly and difficult to mount and replace, leading to seam formation and uneven film thickness.
Innovation Solution
A roller nanoimprint apparatus using a cylindrical mold roller with nanosized recesses, supported by an inflatable elastic film, allows for easy mounting and demounting, ensuring uniform pressure and seamless pattern transfer, preventing film thickness unevenness and enabling cost-effective mass production.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a mold roller with nanostructures is equipped with a bearing mechanism for coupling with the nanoimprinter, then the mold roller can be properly mounted and operated, but the cost of the mold roller increases significantly
Solution Approach 1:
The patent applies the disposable principle by using a simple cylindrical mold roller without expensive bearing mechanisms. The mold roller is designed to be a low-cost, replaceable component that can be easily mounted and removed. The coupling is achieved through simple mechanical means such as a shaft or hub that fits into the nanoimprinter, eliminating the need for precision bearings and complex mounting mechanisms. This allows the mold roller to be manufactured at low cost while maintaining sufficient operational reliability for the intended application lifecycle.
2Manufacturing precision
If a cylindrical member with an undulated pattern is attached to a roller, then the roller can be formed with nanostructures, but it is difficult to form a continuous nanopattern and seams appear in the nanopattern
Solution Approach 1:
The patent applies segmentation by dividing the continuous nanopattern requirement into manageable sections. The cylindrical mold roller is fabricated with nanosized recesses that are continuous around its circumference, eliminating seams. The roller itself is made as a single continuous cylindrical piece rather than attaching separate patterned segments, ensuring the nanopattern is seamless when the roller rotates and contacts the workpiece film.
Solution Approach 2:
Instead of attaching a patterned member to a plain roller (the conventional approach that causes seams), the patent inverts the approach by directly forming continuous nanosized recesses into the cylindrical roller itself. This inversion eliminates the interface between separate components that would create seams, resulting in a continuous nanopattern on the workpiece film.
3Area of stationary object
If the mold roller is moved laterally to transfer the pattern onto a larger roller, then the pattern can be extended beyond the mold roller width, but seams form in the resulting film pattern
Solution Approach 1:
The patent applies curvature by using a cylindrical mold roller with nanosized recesses that wrap continuously around its circumference. This cylindrical geometry allows the pattern to be transferred seamlessly across the entire width of the workpiece film in a single rotation, eliminating the need for lateral movement of the mold roller. The curved surface of the roller ensures continuous contact with the film, producing a seamless wide-area nanopattern.
4Ease of manufacture
If a simple cylindrical mold roller is used without complex mounting mechanisms, then the cost is reduced and ease of replacement is improved, but the ability to maintain uniform pressure and prevent film thickness unevenness may be compromised
Solution Approach 1:
The patent applies self-service by designing the cylindrical mold roller with features that automatically ensure uniform pressure distribution during operation. The roller's cylindrical geometry and the elastic properties of the workpiece film work together to distribute pressure evenly across the contact surface. The simple mounting structure is sufficient because the roller's design itself provides the pressure uniformity needed for consistent film thickness, eliminating the need for complex active pressure control mechanisms.
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 solution enables continuous, seamless transfer of nanostructures onto workpiece films with uniform thickness, reducing production costs and improving the accuracy and efficiency of nanoimprint processes.
Implementation Method 1
a fluid container having an elastic film inflatable by receiving fluid, the fluid container being arranged in a region defined by an inner circumference surface of the mold roller
Data Source
AI summary
A roller nanoimprint apparatus is disclosed which is capable of preventing a workpiece film with nanostructures having been transferred from the mold roller from being uneven in thickness and allowing easy replacement of the mold roller. At least one embodiment of the present invention is directed to a roller nanoimprint apparatus including a mold roller and continuously transferring nanosized protrusions to a surface of a workpiece film by rotating the mold roller, wherein the mold roller is a cylindrical body having an outer circumference surface with nanosized recesses formed thereon, the roller nanoimprint apparatus further includes a fluid container having an elastic film inflatable by injecting fluid into the container, the fluid container being arranged in a region defined by an inner circumference surface of the mold roller, the mold roller is mounted or demounted when the elastic film is shrunken, and the mold roller is supported from the inside when the elastic film is inflated.