Perforated Template Microstructure Manufacturing
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Solution Overview
Problem
Current methods for manufacturing microstructures, such as microneedles for transdermal patches, face issues with template deformation, uneven printing, substrate damage, and inefficiencies due to shallow template depths, leading to inaccuracies and increased production time.
Innovation Solution
The use of a perforated template with through-holes of at least 300 μm depth and enhanced rigidity to resist deformation, allowing for 100% contact printing, reduced template flexing, and increased deposit yield, resulting in more accurate, efficient, and scalable microstructure production.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If shallow templates (10-250 μm depth) are used for manufacturing microstructures, then the manufacturing process is simpler and faster, but template deformation occurs during squeegee manipulation leading to printing inaccuracies
Solution Approach 1:
The patent changes the depth parameter of the template from shallow (10-250 μm) to deep (at least 300 μm, preferably 500-1000 μm). This parameter change increases template rigidity, preventing deformation during squeegee manipulation while maintaining manufacturing efficiency. The deep template structure provides sufficient structural support to resist flexing forces without requiring additional reinforcement elements.
2Ease of manufacture
If shallow templates are used, then the template is easier to manufacture and handle, but the template flexes during printing causing non-uniform microstructures
Solution Approach 1:
The template depth parameter is increased from 10-250 μm to at least 300 μm (preferably 500-1000 μm), which significantly improves rigidity and resistance to flexing during the printing process. This parameter change maintains ease of manufacture through standard fabrication techniques while ensuring dimensional stability.
3Productivity
If shallow templates remain attached to substrate after printing, then the printing process is complete, but substrate shifting and damage occur during template removal
Solution Approach 1:
The patent extracts the problematic attachment mechanism by designing the template with release features or using release liners that allow easy separation. The deep template structure with its increased rigidity enables controlled release without substrate damage, as the template maintains its shape during removal rather than flexing and tearing the substrate.
4Ease of operation
If shallow templates are used, then the template can be easily manipulated, but the volume of microstructure composition that can be contained is limited requiring multiple printing cycles
Solution Approach 1:
The template depth parameter is increased to at least 300 μm (preferably 500-1000 μm), which dramatically increases the volume capacity for holding microstructure composition. This allows a single printing cycle to deposit sufficient material for complete microstructure formation, eliminating the need for multiple sequential printing passes while maintaining ease of template handling through standard manipulation techniques.
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 significantly improves the accuracy and efficiency of microstructure manufacturing, reducing the number of printing cycles, minimizing substrate damage, and enabling the production of consistent microstructures across larger areas with higher precision and cost-effectiveness.
Implementation Method 1
applying a microstructure composition to a perforated template comprising through-holes, wherein the microstructure composition passes through a through-hole and is deposited on a substrate, thereby forming a microstructure
Data Source
AI summary
The present invention provides a novel method for manufacturing a microstructure via the use of a deep template, particularly microstructures that may be found on medical devices, such as transdermal patches, for either cosmetic or medicinal purposes.