Microfluidic Channel Fabrication Using Pre-Patterned Adhesive Tape
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Solution Overview
Problem
Conventional methods for fabricating microfluidic structures are complex and costly, requiring intricate processes that increase manufacturing time and expense, especially when forming small-scale components with low fluidity issues due to ultra-small dimensions.
Innovation Solution
A method involving the use of pre-patterned double-sided tape with adhesion layers, where microfluidic channels are formed by cutting the tape with a knife mold and adhered directly to a substrate, allowing for rapid and simple fabrication of microfluidic devices with precise alignment and stacking capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional photolithography and etching processes are used to fabricate microfluidic structures, then manufacturing precision can be achieved, but device complexity and manufacturing cost increase significantly
Solution Approach 1:
The fabrication process is segmented into simple sequential steps: cutting the belt to form channels, forming adhesion layers, and bonding to substrate. This segmentation eliminates complex photolithography and etching processes while maintaining manufacturing precision through precise cutting and adhesion control.
Solution Approach 2:
The invention uses a pre-patterned belt as a master template that directly copies the microfluidic channel pattern onto the final device. This copying approach replaces complex multi-step patterning processes with a single cutting and bonding operation, significantly reducing device complexity.
2Productivity
If complicated patterns are formed on microfluidic structures to increase diffusion rate, then fluid flow performance improves, but manufacturing time and cost increase
Solution Approach 1:
The belt is pre-patterned with the desired microfluidic channel configurations before the actual device assembly. This preliminary action allows complex patterns to be prepared in advance using simple cutting processes, eliminating the need for time-consuming photolithography and etching steps during device fabrication.
Solution Approach 2:
The invention changes the fundamental fabrication parameters from chemical etching and photolithography to mechanical cutting and adhesion bonding. This parameter change enables rapid fabrication of complex patterns while maintaining precise control over channel geometry and diffusion characteristics.
3Measurement precision
If ultra-small dimension microfluidic structures are fabricated to handle micro-materials, then testing and research capability improves, but fluid flow becomes difficult without external driving forces
Solution Approach 1:
The adhesion layer acts as an intermediary that enables precise bonding between the microfluidic channel belt and the substrate. This intermediary layer allows the ultra-small dimension structures to be securely assembled while maintaining fluid flow paths that can be driven by diffusion, capillarity, or external forces as needed.
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 simplifies the fabrication process, reduces costs, and enables efficient fluid flow in microfluidic structures, making it suitable for biomedical applications such as protein and stem cell analysis with improved resolution and alignment precision.
Implementation Method 1
an adhesion layer is formed on at least one surface of the belt
Data Source
AI summary
A method for fabricating microfluidic structures is provided. The method includes: a belt is provided and an adhesion layer is formed on at least one surface of the belt; the belt is cut for forming a first microfluidic channel thereon, wherein the first microfluidic channel has an accommodating space; a second microfluidic channel is provided, wherein a line-width of the second microfluidic channel is smaller than a line-width of the first microfluidic channel; the second microfluidic channel is disposed in the accommodating space of the first microfluidic channel; and a substrate is adhered to the belt via the adhesion layer.