Gradient Thin-Film Slot Die for Roll-to-Roll Multi-Material Patterning
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing thin film manufacturing methods, such as slot die coating, are limited in scalability, material selection, and waste production, and struggle to create complex gradient patterns efficiently.
Innovation Solution
A hybrid scaling and patterning system with a plurality of mixing chambers and a slot die outlet that allows for single-step deposition of multi-material patterned thin films, enabling the mixing and deposition of multiple fluids onto a substrate to form gradient patterns.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional slot die coating is used to create thin films, then continuous single sheets can be manufactured with high quality, but scalability and ability to create complex gradient patterns are limited
Solution Approach 1:
The coating system is divided into multiple independent fluid inlets (first, second, and third fluid inlets) that can deliver different materials separately. These segmented fluid streams are then combined and mixed within the slot die structure, allowing complex gradient patterns to be created by controlling the mixing of individual fluid components while maintaining continuous production.
2Manufacturing precision
If conventional slot die coating is used, then high quality films can be produced, but waste production increases and material selection is limited
Solution Approach 1:
Multiple fluid streams from different inlets are merged and mixed within the slot die structure before deposition. This combining approach allows precise control over material distribution and gradient formation, reducing material waste by ensuring optimal use of each fluid component while maintaining high film quality.
3Quantity of substance
If passive mixing mechanisms are used in microfluidics, then mixing can occur at low flow rates, but the flow rates are too low for scaled manufacturing
Solution Approach 1:
The system enables passive mixing to occur at significantly higher flow rates (e.g., 1-10 mL/min) compared to conventional microfluidic devices by modifying the flow channel geometry and mixing chamber design. This parameter change in operating flow rate allows scaled manufacturing while maintaining effective fluid mixing through passive mechanisms without requiring active actuators.
4Quantity of substance
If active mixing mechanisms are used, then mixing can be induced with external forces, but device complexity increases
Solution Approach 1:
The mixing process is designed to occur passively through the natural flow dynamics and geometric features of the mixing chambers, without requiring external actuators or complex active mechanisms. The system uses the kinetic energy of the flowing fluids themselves to achieve mixing, eliminating the need for additional power sources or complex control systems.
5Ease of manufacture
If conventional slot die designs are used, then simple line or stripe patterns can be created, but the ability to create other desired patterns is limited
Solution Approach 1:
The slot die structure is designed with multiple fluid inlets and configurable mixing chambers that can accommodate different material combinations and flow rate ratios. This universal design allows the same device to produce various gradient patterns (linear, nonlinear, segmented) by adjusting input parameters rather than requiring different specialized tools for each pattern type.
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
Enables the production of scalable gradient patterned thin films with improved functionality, allowing for enhanced electrical, thermal, adhesive, and mechanical properties, and supports higher flow rates and complex patterns.
Implementation Method 1
mixing chambers configured to receive at least two fluids from the plurality of fluid inlets and mix the at least two fluids to create a fluid mixture
Implementation Method 2
controlling the plurality of fluid flow rates to adjust a mixture ratio of the at least two fluids
Implementation Method 3
a slot die outlet configured to receive the fluid mixture and deposit the fluid mixture onto a substrate
Data Source
AI summary
A scaling and patterning apparatus for producing thin films with multi-material, customized gradient patterns is disclosed. The apparatus includes a slot die body integrated with multiple inlets and corresponding converging channels passing materials through the die body into a geometry configured for mixing the materials internally. The scaling and patterning apparatus may be used in a method of preparing multi-material, gradient patterned thin film materials.