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Replication molds having nanometer-scale shape control fabricated by means of oxidation and etching
G M Kim1, A Kovalgin, J Holleman
1Institute of Microelectronics and Microsystems, Ecole Polytechnique Fédérale de Lausanne (EPFL), 1015 Lausanne, Switzerland.
Journal of Nanoscience and Nanotechnology
|August 12, 2003
Summary
Accurate control of mold curvature radius for nanostructure replication is achieved using localized silicon dioxide growth. This method enables fabrication of molds with radii from 10-250 nm for applications in soft lithography and nanoprobe engineering.
Area of Science:
- Materials Science
- Nanotechnology
- Surface Chemistry
Background:
- Nanostructure replication is crucial for advanced technologies.
- Precise control over mold geometry, specifically curvature radius, is a key challenge.
- Existing methods lack fine control over mold curvature for nanoscale applications.
Purpose of the Study:
- To present a novel method for accurate control of mold curvature radius in nanostructure replication.
- To enable fabrication of molds with tunable curvature radii for nanolithography.
- To explore the application of these molds in creating various nanostructures.
Main Methods:
- Utilizing local non-uniform growth of silicon dioxide (SiO2) at high-curvature regions.
- Employing numerical simulations to predict mold radius based on oxidation temperature and time.
- Conducting experimental validation through oxidation, etching, and scanning electron microscopy (SEM).
Main Results:
- Fabrication of molds with curvature radii ranging from 10 to 250 nm.
- Experimental confirmation of simulated mold radius predictions.
- Successful replication of silicon, silicon dioxide, and polymer nanostructures using fabricated molds.
Conclusions:
- The presented method offers accurate control over mold curvature for nanostructure replication.
- The developed molds are suitable for creating diverse nanostructures via soft lithography.
- This technique advances the design and fabrication of components for nanoprobe engineering and related fields.