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Laser-Induced Graphene Formation on Polyimide Using UV to Mid-Infrared Laser Radiation.
Vitalij Fiodorov1, Romualdas Trusovas1, Zenius Mockus2
1Department of Laser Technologies, Center for Physical Sciences and Technology, Savanoriu Ave. 231, LT-02300 Vilnius, Lithuania.
Polymers
|November 14, 2023
Summary
Researchers developed laser methods to create conductive graphene on polymers. This technique enables the fabrication of copper tracks on 3D materials for advanced electronics.
Area of Science:
- Materials Science
- Nanotechnology
- Surface Engineering
Background:
- Developing conductive surfaces on polymers is crucial for advanced electronic applications.
- Laser-based methods offer precise control for surface modification.
Purpose of the Study:
- To investigate laser-assisted methods for producing conductive graphene layers on polymer surfaces.
- To analyze the structural and electrical properties of laser-treated polymer surfaces.
Main Methods:
- Utilized a picosecond laser (355, 532, 1064 nm) and a CO2 laser (10.6 µm) for surface treatment.
- Performed sheet resistance measurements, microscopic analysis, and Raman spectroscopy.
- Deposited copper layers via galvanic plating on laser-formed graphene.
Main Results:
- High-quality few-layer graphene structures were formed on the polymer surface (PI).
- Laser treatment, particularly with 1064 nm in nitrogen, yielded specific Raman intensity ratios (I(2D)/I(G) = 0.81, I(D)/I(G) = 0.46).
- Achieved a conductive laser-induced graphene layer with a low sheet resistance of 5 Ω, followed by 3-10 µm copper deposition.
Conclusions:
- Laser-assisted fabrication is a viable method for creating conductive graphene on polymers.
- The developed technique shows significant potential for fabricating copper tracks on 3D materials for advanced electronic applications.
