Film Transfer via Adhesion Force Segmentation
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Solution Overview
Problem
Existing film transferring methods face challenges in achieving precise control when the difference in adhesion force between components is insignificant, making it difficult to accurately transfer films between substrates and rollers.
Innovation Solution
A film transferring method that involves forming a first adhesion surface with a weak or strong adhesion force on one side and a second adhesion surface with a different adhesion force on the other side, allowing for precise transfer by peeling the film from one substrate and adhering it to another while maintaining continuous transport, using techniques such as forming a weak or strong adhesion force layer or varying surface roughness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the adhesion force between the stamp and the film is designed to be larger than the adhesion force between the source substrate and the film, then the film can be transferred to the stamp, but if the difference in adhesion force between the source substrate, the stamp, and the targeted substrate is insignificant, then it is difficult to accurately transfer the film to the targeted substrate
Solution Approach 1:
The film is divided into a first region and a second region with different adhesion forces. The first region has a first adhesion force for transferring to the stamp, and the second region has a second adhesion force for transferring to the targeted substrate. This segmentation allows independent optimization of adhesion forces for each transfer stage, resolving the contradiction when overall adhesion force differences are insignificant.
Solution Approach 2:
Different regions of the film are assigned different adhesion properties. The first region is designed with specific adhesion characteristics for stamp transfer, while the second region has different adhesion characteristics for targeted substrate transfer. This local differentiation enables precise control of film transfer even when global adhesion force differences are small.
2Productivity
If a plurality of films are stacked on the targeted substrate for stacking operation, then production efficiency is improved, but if the difference in each adhesion force between the films is insignificant, then it may be more difficult to design the transferring process
Solution Approach 1:
Each film in the stack is segmented into regions with different adhesion forces. The first region of each film provides uniform adhesion for stamp pickup, while the second region provides controlled adhesion for sequential placement on the targeted substrate. This segmentation simplifies the design of multi-film transferring processes by providing consistent adhesion characteristics across all films.
Solution Approach 2:
The adhesion force parameters are changed between different regions of the film. By modifying the adhesion force in the first region versus the second region, the process enables controlled transfer of multiple films with different adhesion requirements, reducing design complexity for stacking operations.
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 precise transfer control of films between substrates and rollers even when the adhesion forces are substantially the same, ensuring accurate and efficient film transfer.
Implementation Method 1
a first adhesion force between the roller and the film and a second adhesion force between the film and the substrate
Implementation Method 2
a first weak adhesion force that is smaller than the second adhesion force is formed between the front adhesion surface and the substrate
Data Source
AI summary
A film transferring method according to an embodiment of the present invention of transferring a film adhered to a substrate to a roller in a state that a first adhesion force between the roller and the film and a second adhesion force between the film and the substrate are substantially the same includes: a transporting step of transporting the substrate and the film of which a first adhesion surface formed on one surface is adhered to the substrate in a first direction; a close contacting step of closely contacting the front end of the second adhesion surface formed on the other surface of the film that is transported with the roller rotating in the first rotation direction; and a transferring step of peeling the film from the substrate and simultaneously transferring it to the roller by peeling the front adhesion surface of the first adhesion surface from the substrate, while simultaneously transferring the front end of the second adhesion surface to the roller and continuously transporting the substrate in the first direction, wherein a first weak adhesion force that is smaller than the second adhesion force is formed between the front adhesion surface and the substrate.