A meniscus morphology modulation method for meniscus-confined electrodeposition.

Area of Science:

• Materials Science
• Microfabrication
• Electrochemistry

Background:

• Meniscus-confined electrodeposition (MCED) is a promising micro-nano-fabrication technique.
• MCED offers low cost, simple processing, and the ability to create complex 3D structures.
• However, MCED's deposition continuity and stability are hindered by external factors affecting meniscus morphology.

Purpose of the Study:

• To develop a novel method for regulating meniscus morphology in MCED.
• To enhance the stability and continuity of the electrodeposition process.
• To expand the fabrication capabilities for complex 3D microstructures.

Main Methods:

• A meniscus morphology regulation method was developed using tail-end pressurization of glass probes.
• Internal solution pressure was controlled to adjust the meniscus profile radius.
• Simulations and experiments were conducted to validate the method.

Main Results:

• Adjusting solution pressure (-5 kPa to 5 kPa) controlled meniscus width from 0.6 to 1.5 times the initial value.
• Successfully fabricated a copper pillar array (33 μm height, 7–15 μm width) by controlling meniscus diameter.
• Demonstrated improved continuity and stability in electrochemical deposition.

Conclusions:

• The developed pressure-controlled method effectively regulates meniscus morphology in MCED.
• This technique enhances deposition stability and enables the preparation of complex 3D microstructures.
• The findings broaden the application scope of meniscus-confined electrodeposition.