Thin films of two functional oxides patterned laterally by soft lithography.

Area of Science:

• Materials Science
• Nanotechnology
• Thin Film Deposition

Background:

• Fabricating patterned functional oxide thin films is crucial for advanced electronic and magnetic devices.
• Controlling the lateral arrangement of distinct oxide phases at the microscale presents significant challenges.

Purpose of the Study:

• To develop a reliable method for creating laterally patterned dual-phase oxide thin films.
• To investigate the structural and morphological characteristics of these patterned films.

Main Methods:

• Utilized a two-step soft-lithographic micromolding process.
• Fabricated CoFe(2)O(4)/ZnO and CoFe(2)O(4)/BaTiO(3) dual-phase patterns.
• Characterized film structure using X-ray diffraction and morphology with magnetic force microscopy.

Main Results:

• Achieved good replication of the initial pattern with uniform film thickness.
• Confirmed the presence of two distinct phases and their lateral separation.
• Observed slight height variations at phase edges, indicating areas for process optimization.
• Demonstrated sufficient film smoothness for potential multilayer structure fabrication.

Conclusions:

• The soft-lithographic micromolding technique is effective for producing laterally patterned dual-phase oxide thin films.
• The process allows for controlled arrangement of different functional oxides.
• The resulting films are suitable for further development in multilayer device architectures.