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Comparative study of electroless copper film on different self-assembled monolayers modified ABS substrate
Jiushuai Xu1, Ruibin Fan2, Jiaolong Wang3
1College of Science, Northwest A&F University, Xinong Road No. 22, Yangling 712100, Shaanxi, China. xujiushuai@126.com.
International Journal of Molecular Sciences
|April 18, 2014
Summary
Electroless copper plating on acrylonitrile-butadiene-styrene (ABS) substrates modified with self-assembled monolayers (SAMs) showed TES-SAMs resulted in faster copper nuclei formation and superior film properties compared to MPTMS-SAMs and APTES-SAMs.
Area of Science:
- Materials Science
- Surface Chemistry
- Electrochemistry
Background:
- Acrylonitrile-butadiene-styrene (ABS) is a common polymer substrate requiring surface modification for enhanced metal adhesion.
- Self-assembled monolayers (SAMs) offer a versatile approach to tailor substrate surface properties for improved plating performance.
- Electroless copper plating is a crucial technique for metallization in various electronic applications.
Purpose of the Study:
- To investigate the effect of different SAMs (MPTMS, APTES, TES) on electroless copper film deposition on ABS substrates.
- To compare the deposition rate, film morphology, and adhesion properties of copper films formed on SAM-modified ABS.
- To evaluate the structural characteristics and electromigration resistance of the deposited copper films.
Main Methods:
- Preparation of ABS substrates modified with MPTMS, APTES, and TES SAMs.
- Electroless copper plating on the modified ABS substrates.
- Characterization of copper films using Scanning Electron Microscopy (SEM) and X-ray Diffraction (XRD).
- Measurement of deposition rate and contact angle.
- Adhesion property testing.
Main Results:
- TES-SAMs modified ABS exhibited faster copper nuclei formation and higher nuclei density compared to MPTMS- and APTES-SAMs.
- SEM revealed smoother, more uniform copper films on TES-SAM modified substrates, with limited coverage and larger particles on MPTMS/APTES-SAMs.
- All SAMs improved the interfacial interaction and adhesion between the copper plating and the ABS substrate.
- XRD analysis indicated a preferred Cu(111) orientation in the deposited copper films, with TES-SAMs yielding superior electromigration resistance.
Conclusions:
- TES-SAMs significantly enhance the quality and performance of electrolessly deposited copper films on ABS substrates.
- The choice of SAM critically influences copper nucleation, film morphology, adhesion, and ultimately, the reliability of the metallized ABS.
- This study highlights the potential of tailored SAMs for advanced surface engineering in polymer metallization for demanding applications.
