Dielectric Constant Microscope for Organic Specimen Imaging
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Solution Overview
Problem
Current methods for observing micro organic specimens, such as biological specimens, face challenges in visualizing their shape due to the large dielectric constant gap at the interface with aqueous solutions, requiring complex pretreatments and equipment like scanning electron microscopes.
Innovation Solution
A dielectric constant microscope with first and second insulating films opposing each other, where application-side and measurement-side conductive films are regularly spaced, applies input signals with different frequencies to measure potential changes, allowing visualization of the organic specimen's shape from dielectric constant distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a scanning electron microscope is used to observe micro organic specimens, then high-resolution imaging is achieved, but the specimen requires complex pretreatment (vacuum maintenance, conductive coating, heavy metal staining) and may be damaged by electron beam irradiation
Solution Approach 1:
The patent introduces an intermediary measurement approach by measuring dielectric constant distribution instead of directly imaging with electron beams. The dielectric constant serves as a mediator that reflects specimen structure without requiring direct electron-beam-specimen interaction, thereby eliminating the need for vacuum, conductive coating, and heavy metal staining while avoiding electron beam damage
Solution Approach 2:
The patent replaces the mechanical/electronic imaging system (electron beam scanning) with a dielectric measurement system. Instead of using electron beams to directly image the specimen, the system applies electric fields and measures dielectric responses, substituting a less invasive physical mechanism that does not require complex specimen preparation
2Measurement precision
If the electron beam irradiation diameter is narrowed to improve resolution, then spatial resolution increases, but the measurement time increases and productivity decreases
Solution Approach 1:
The patent segments the measurement into multiple frequency components. By applying electric fields at different frequencies and measuring dielectric responses at each frequency, the system obtains comprehensive spatial information without requiring sequential scanning at high resolution, thereby maintaining measurement speed while achieving resolution through frequency-domain analysis
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables clear visualization of the organic specimen's shape without pretreatment, even when the specimen changes rapidly, by measuring spatial dielectric constant changes between the films, and can be used in aqueous solutions at atmospheric pressure.
Implementation Method 1
measuring a dielectric constant distribution... visualizes an organic specimen by measuring a dielectric constant distribution... since the specific dielectric constant of water is about 80 which is large, water is not affected by the potential change... Since the specific dielectric constant of an organic specimen ranges from about 2 to 3 which is small, the organic specimen is greatly affected by the potential change
Implementation Method 2
local potential change is caused and an attenuation state when the electron beam passes through the organic specimen in the aqueous solution can be observed as an image... Since the specific dielectric constant of water is about 80 which is large, water is not affected by the potential change... the organic specimen is greatly affected by the potential change and attenuates the electron beam
Data Source
AI summary
A dielectric constant microscope to observe a shape of a micro organic specimen includes first and second insulating films that are disposed to oppose each other such that the organic specimen along with the solution is interposed therebetween, and application-side conductive films P1 to Pn (where n is an integer greater than 1). The application-side conductive films are separated from each other on an outward surface of the first insulating film. Additionally, the dielectric constant microscope includes measurement-side conductive films p1 to pm (where m is an integer greater than 1) that are separated from each other on an outward surface of the second insulating film. Input signals Sf1 to Sfn having potential change at different frequencies are applied to the application-side conductive films P1 to Pn, potential change is measured for each of the measurement-side conductive films p1 to pm, and the organic specimen is visualized from a dielectric constant distribution between the first and second insulating films obtained by separating the potential change depending on the frequencies.