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Capacitor With A Dielectric

Capacitor With A Dielectric

Parallel plate capacitors consist of two conducting plates separated by a certain distance. However, it is mechanically difficult to hold the large plates parallel to each other without actual contact. Hence, a dielectric layer is commonly placed between the plates, which provides an easy solution for holding the plates together with a small gap and increases the capacitance of the capacitor.
Dielectrics are non-conducting materials with no free or loosely bound electrons. When a dielectric is...

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Updated: Aug 8, 2025

Microfluidic Fabrication Techniques for High-Pressure Testing of Microscale Supercritical CO2 Foam Transport in Fractured Unconventional Reservoirs

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Programmable UV-Curable Resin by Dielectric Force.

Yi-Wei Lin^1,2, Chang-Yi Chen², Ying-Fang Chang²

¹Institute of NanoEngineering and Microsystem, National Tsing Hua University, Hsinchu 30013, Taiwan.

|February 25, 2023

Summary

This summary is machine-generated.

Researchers precisely patterned UV-curable resin using dielectric force, finding current and AC frequency critical for controlling droplet size and line width for microfabrication.

Keywords:

UV curable resin dielectric force programmable UV resin

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Area of Science:

Materials Science and Engineering
Microfabrication
Dielectrophoresis

Background:

Dielectric force, generated by dielectric chips with interdigitated electrodes, is a key mechanism in microfluidic manipulation.
Precise control over material patterning is essential for creating micro-scale structures and devices.

Purpose of the Study:

To investigate the programmable control of dielectric force for patterning UV-curable resin.
To determine the influence of electrical parameters (current, voltage, frequency) on resin patterning.
To demonstrate the fabrication of micro-structural parts using this method.

Main Methods:

UV-curable resin was patterned using programmable dielectric force generated by interdigitated electrodes.
Electrical parameters including current (0.1-0.5 A), voltage (100-300 V), and AC electric field frequency (10-50 kHz) were systematically varied.
The resulting droplet area and pattern line width were measured after UV curing.

Main Results:

Current significantly influenced the UV resin driving area, while voltage showed minimal effect.
Increasing AC electric field frequency allowed fine control of UV resin pattern line width from 224 µm to 137 µm.
Accurate pattern shapes were achieved by controlling current and frequency.

Conclusions:

Dielectric force offers a viable method for programmable patterning of UV-curable resins.
Current and AC frequency are critical control factors for achieving precise micro-scale patterns.
This technique enables the successful fabrication of intricate micro-structural parts.