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Microscale patterning of thermoplastic polymer surfaces by selective solvent swelling.
Omid Rahmanian1, Chien-Fu Chen, Don L DeVoe
1Department of Bioengineering, University of Maryland, College Park, Maryland 20742, United States.
Langmuir : the ACS Journal of Surfaces and Colloids
|August 21, 2012
Summary
A novel orogenic microfabrication method raises thermoplastic surfaces using solvent swelling, creating 3D microscale features. This photolithography-free technique offers versatile patterning for advanced thermoplastic applications.
Area of Science:
- Materials Science
- Microfabrication Engineering
Background:
- Traditional thermoplastic microfabrication relies on material removal (machining, embossing).
- These methods face limitations in creating complex 3D microstructures on thermoplastic substrates.
Purpose of the Study:
- To introduce a new microfabrication technique called orogenic microfabrication.
- To demonstrate its capability in creating 3D microscale features on thermoplastic surfaces via solvent swelling.
Main Methods:
- Developed orogenic microfabrication utilizing irreversible solvent swelling to raise thermoplastic surface regions.
- Employed various masking methods including photoresist, UV/ozone passivation, elastomeric stamping, and inkjet printing.
- Utilized cyclic olefin copolymer as a model material to achieve feature heights from nanometers to micrometers.
Main Results:
- Successfully fabricated 3D microscale features on thermoplastic substrates.
- Achieved controlled feature heights ranging from several nanometers to tens of micrometers.
- Demonstrated photolithography-free patterning using inkjet printing for rapid microfabrication.
Conclusions:
- Orogenic microfabrication is a versatile and effective method for creating complex 3D microstructures in thermoplastics.
- The technique offers advantages over traditional methods, particularly in its solvent-swelling mechanism and photolithography-free options.
- This approach enables facile desktop microfabrication of thermoplastic materials.
