Laser-Cut Metal Foil on Transparent Polymer Carrier
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Laser cutting of metal foils is hindered by impinging air flows that move the cut material, making multi-pass cutting impractical and complicating the separation of cut parts from scrap, as the air interferes with precise re-alignment of the laser beam and causes debris to redeposit on the substrate.
Innovation Solution
A polymer backing layer transparent to the laser wavelength is laminated to the metal foil, allowing the metal foil to be cut without damaging the backing, and a restraining vacuum mechanism retains the substrate in place, while a defocused laser beam and sinusoidal pattern aid in curling and separating the cut parts from the carrier layer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If impinging air flow is used to remove debris from cut site, then debris redeposition is prevented, but cut material is moved making multi-pass cutting impractical
Solution Approach 1:
A transparent carrier layer is introduced as an intermediary between the metal foil and the air flow. The carrier layer protects the cut material from being blown away while allowing the air flow to continue removing debris. The laser beam passes through the carrier layer to cut the metal foil, and the carrier layer remains intact throughout the process, providing a stable base for multi-pass cutting.
2Manufacturing precision
If impinging air flow is used to cool and re-solidify cut metal foil, then cut quality is improved, but cut parts are blown into undesirable locations
Solution Approach 1:
The transparent carrier layer serves as a mediator that allows the air flow to cool and re-solidify the cut metal foil without directly contacting and moving the cut parts. The carrier layer provides a stable surface that holds the cut parts in place while still permitting the beneficial cooling effect of the air flow.
3Manufacturing precision
If multiple passes of laser beam are used to cut metal foil, then cutting precision is improved, but material movement between passes prevents accurate re-alignment
Solution Approach 1:
The transparent carrier layer acts as a stable reference frame that remains unchanged during multi-pass cutting. Since the carrier layer is not affected by the air flow, it provides consistent positioning markers that allow the laser beam to be accurately re-aligned between passes, ensuring reliable multi-pass cutting operations.
4Object-affected harmful factors
If air flow is directed at cut site to prevent debris deposition, then substrate contamination is reduced, but substrate movement is caused making separation difficult
Solution Approach 1:
The transparent carrier layer serves as a protective intermediary that shields the metal foil substrate from the direct impact of air flow. This prevents substrate movement and simplifies separation, while still allowing the air flow to effectively remove debris from the cut site by passing through the carrier layer.
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 multi-pass laser cutting of metal foils without material movement and facilitates easy separation of cut parts from scrap, maintaining the integrity of the polymer backing and improving the quality of the cut by preventing debris redeposition.
Implementation Method 1
The metal foil layer is vaporized by the laser beam at the selected wavelength
Implementation Method 2
the carrier layer is transparent to the laser beam at the selected wavelength such that the carrier layer remains substantially intact
Implementation Method 3
The substrate is retained in place during laser processing by a restraining mechanism comprising generating a vacuum below the substrate
Implementation Method 4
The laser beam is then directed to removal areas cut from the substrate to cause the metal foil to curl proximate one or more cut lines and lift off of the carrier layer
Data Source
AI summary
Laser cutting a metal foil by providing a polymer film as a carrier layer for the metal foil where the metal foil is ablated by the laser beam wavelength selected for laser cutting and wherein the polymer film is a polymer film that is transparent to the laser beam wavelength selected for laser cutting such that laser cutting produces metal foil cut parts in a substrate while the polymer backing remains intact for supporting the cut parts for subsequent separation of the cut parts from substrate.