An ultraviolet-curable mold for sub-100-nm lithography

Area of Science:

• Materials Science
• Nanotechnology
• Polymer Chemistry

Background:

• Replication of sub-100-nm features requires molds with high precision and mechanical stability.
• Existing mold materials often compromise between stiffness for feature fidelity and flexibility for large-area applications.
• Chemical inertness and easy mold release are critical for efficient nano-patterning processes.

Purpose of the Study:

• To introduce a novel UV-curable mold material for high-resolution nano-patterning.
• To demonstrate the material's capability for replicating dense sub-100-nm features with high aspect ratios.
• To highlight the mold's suitability for large-area replication and its ease of use.

Main Methods:

• Development of a UV-curable composite material for mold fabrication.
• Characterization of the mold's mechanical properties (stiffness and flexibility).
• Evaluation of the mold's chemical resistance and surface properties for release characteristics.
• Demonstration of self-replication capability.

Main Results:

• The UV-curable mold successfully replicated dense sub-100-nm features with high aspect ratios.
• The mold exhibited sufficient stiffness for precise feature transfer and flexibility for large-area applications when supported.
• The composite material demonstrated inertness to common chemicals and solvents.
• Low surface energy facilitated easy and clean mold removal after patterning.
• Successful self-replication of the mold was achieved.

Conclusions:

• The novel UV-curable mold material offers a unique combination of stiffness, flexibility, and chemical resistance.
• Its properties enable high-fidelity replication of nanoscale features over large areas.
• The material's ease of release and self-replication capabilities enhance its utility for diverse patterning applications.
• This advanced mold technology holds significant potential for various micro- and nanofabrication processes.