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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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Development of Whispering Gallery Mode Polymeric Micro-optical Electric Field Sensors

Development of Whispering Gallery Mode Polymeric Micro-optical Electric Field Sensors

Published on: January 29, 2013

A microfabricated sensor for thin dielectric layers.

P Fierlinger¹, R DeVoe, B Flatt

¹Physics Department, Stanford University, Stanford, California 94305, USA.

The Review of Scientific Instruments

|May 2, 2008

Summary

This summary is machine-generated.

We developed a microfabricated capacitor sensor to measure atomic layers of dielectric materials. This sensor enables dynamic control of thin film coatings, crucial for various environmental applications.

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Published on: September 19, 2017

Area of Science:

Materials Science
Nanotechnology
Sensor Technology

Background:

Accurate measurement of thin dielectric layers is challenging.
Controlling thin film deposition requires precise monitoring.
Existing methods lack sensitivity for atomic-scale layers.

Purpose of the Study:

To present a novel microfabricated capacitor sensor for measuring thin dielectric layers.
To demonstrate the sensor's capability in diverse environmental conditions.
To explore dynamic maintenance of few-layer coatings.

Main Methods:

Microfabrication of a capacitor with interleaved aluminum fingers.
Exposure of the capacitor to the dielectric material for measurement.
Utilizing fast, high-sensitivity capacitance readout.
Implementing a feedback system for environmental parameter control.

Main Results:

Achieved sensitivity to single atomic layers in various configurations.
Demonstrated dynamic maintenance of few-layer coatings.
Successfully measured atomically thin solid xenon layers in cryogenic conditions.

Conclusions:

The developed sensor offers high sensitivity for measuring thin dielectric layers.
The sensor facilitates dynamic control over thin film deposition.
This technology has potential applications in nanotechnology and materials science.