Flexible Substrate Coating Film Removal Timing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing methods for coating flexible substrates with protective films often result in contamination, damage, or inhomogeneous layer deposition due to improper removal and reapplication of protective films, particularly when the substrate interacts with deflection rollers before and after coating processes.
Innovation Solution
A method where the first protective film is removed from the flexible substrate only after it makes contact with a process roller, and a second protective film is applied after the coating process, ensuring constant angle removal and minimal exposure to mechanical contact, thereby preventing contamination and ensuring homogeneous layer deposition.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the protective film is removed before the substrate reaches the coating zone, then the substrate surface is exposed for coating, but the substrate surface can be contaminated or damaged by deflection rollers before coating
Solution Approach 1:
The protective film is removed only after the substrate has made mechanical contact with the process roller, which is a preliminary action that positions the substrate optimally before film removal. This timing ensures the substrate is stable and properly positioned, preventing contamination from deflection rollers while maintaining surface exposure for coating.
Solution Approach 2:
The process roller acts as an intermediary element between the substrate and the coating zone. By removing the protective film after contact with this controlled intermediary surface, the substrate avoids direct contact with potentially contaminating deflection rollers, yet remains in a controlled environment for subsequent coating.
2Productivity
If the protective film is removed early to allow coating, then coating can proceed, but electrical discharges can occur between the detached film and substrate causing damage
Solution Approach 1:
The substrate is first guided over the process roller to establish mechanical contact and stability before the protective film removal action occurs. This preliminary positioning prevents the substrate from being in a vulnerable state during film detachment, eliminating electrical discharge risks while maintaining coating efficiency.
Solution Approach 2:
The process roller contact serves as a cushioning measure before film removal. This preliminary contact stabilizes the substrate electrically and mechanically, providing a protective effect that prevents damage from subsequent film detachment and eliminates electrical discharge hazards.
3Ease of operation
If the substrate is guided over deflection rollers before coating, then the substrate can be positioned, but the coated side can be contaminated or damaged
Solution Approach 1:
The substrate is guided over the process roller with controlled mechanical contact before film removal and coating. This preliminary action achieves proper positioning without requiring additional deflection rollers that would contaminate the coated side, simplifying the path while maintaining positioning accuracy.
Solution Approach 2:
The invention extracts the unnecessary deflection rollers from the substrate path by using the process roller as the primary positioning element. This removal of redundant components eliminates the contamination risk they would introduce while preserving the substrate positioning function.
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 method ensures good and homogeneous layer properties by maintaining the substrate's cleanliness and preventing direct mechanical contact with system components, reducing the risk of contamination and damage, and allowing for consistent layer deposition.
Implementation Method 1
the coating device can be designed, for example, as a sputtering magnetron
Implementation Method 2
or as an evaporation device
Data Source
Figure 1
AI summary
The invention relates to a method for coating a flexible substrate (4), which is led over a process roller (3), wherein the flexible substrate (4) has a first protective film (6), which is removed from the flexible substrate (4) before the flexible substrate (4) enters the coating zone of a coating device (2) lying opposite the process roller (3). In this case, the first protective film (6) is removed from the flexible substrate (4) after the flexible substrate (4) has formed a mechanical contact with the surface of the process roller (3) and a second protective film (7) is applied to the coated side of the flexible substrate (4) after the flexible substrate (4) has left the coating zone of the coating device (2) and before the mechanical contact between the process roller (3) and the flexible substrate (4) is ended.