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Graphene-Oxide-Assisted Electroless Cu Plating on a Glass Substrate.
Ayumu Nakasuji1, Syun Gohda2, Hideya Kawasaki1
1Department of Chemistry and Materials Engineering, Faculty of Chemistry, Materials and Bioengineering, Kansai University, Suita, Osaka 564-8680, Japan.
Langmuir : the ACS Journal of Surfaces and Colloids
|December 26, 2024
Summary
This study introduces a new method for plating copper onto glass substrates using graphene oxide and silver nanoparticles. This enhances adhesion and maintains smoothness, crucial for 5G and 6G communication technologies.
Area of Science:
- Materials Science
- Nanotechnology
- Surface Chemistry
Background:
- High-frequency communication (5G/6G) demands substrates with minimal signal loss and electromagnetic interference.
- Glass substrates offer low dielectric constants and surface smoothness but suffer from poor copper adhesion.
- Conventional methods for improving adhesion often compromise the required surface smoothness.
Purpose of the Study:
- To develop a novel electroless copper plating method for glass substrates.
- To enhance adhesion between copper and glass without sacrificing surface smoothness.
- To provide a cost-effective alternative to existing plating techniques.
Main Methods:
- Utilizing graphene oxide (GO) as an intermediary layer on amino-functionalized glass.
- Employing a preheating step to form covalent C-N bonds between GO and the glass surface.
- Incorporating silver nanoparticles (Ag NPs) as a catalyst for electroless copper plating.
Main Results:
- Achieved strong adhesion of copper to glass via GO intermediary layer, confirmed by tape peel tests.
- Preserved excellent surface smoothness (Ra = 6.6 nm) essential for high-frequency applications.
- Demonstrated low volume resistivity of the copper film (2.4 μΩ·cm).
- Utilized cost-effective Ag NPs, replacing palladium catalysts.
Conclusions:
- The GO-based electroless plating method effectively enhances copper adhesion on glass substrates.
- This technique maintains critical surface smoothness for high-frequency applications.
- The method offers a promising, cost-effective solution for advanced substrates in next-generation communication systems.
