Measuring Container for Impurity Ion Detection
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Solution Overview
Problem
Existing methods, such as those using time of flight (TOF), face difficulties in measuring extremely small amounts of impurity ions in liquids, particularly in high-purity solvents or solutions used in organic EL and semiconductor manufacturing.
Innovation Solution
A measuring container and system comprising a first and second electrode with insulation films, sealed by a seal material, and a voltage signal generator applying a triangular wave voltage to detect current signals, allowing for precise measurement of impurity ions by isolating electron and ion conduction currents.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a conventional TOF measuring method is used to measure impurity ions in high-purity liquid, then the measurement can be performed with simple equipment, but the detection sensitivity is insufficient and extremely small amounts of impurity ions cannot be measured
Solution Approach 1:
The patent segments the current measurement into two distinct components: electron conduction current and ion conduction current. By applying a triangular wave voltage and measuring current at specific time points (peak voltage and zero voltage), the method separates these currents mathematically, allowing precise measurement of trace impurity ions despite the presence of dominant electron conduction in organic substances.
Solution Approach 2:
The patent changes the voltage parameter by applying a triangular wave voltage signal with varying amplitude and time characteristics. By measuring current at specific voltage points (peak and zero), the method transforms the measurement parameters to isolate ion conduction effects from electron conduction effects, thereby achieving high detection sensitivity for impurity ions.
2Measurement precision
If insulation films are added to isolate electron conduction from ion conduction, then measurement precision improves, but device complexity increases
Solution Approach 1:
The patent introduces insulation films as intermediary layers between the electrodes and the organic substance. These films act as mediators that block electron conduction while allowing ion conduction to be measured, thereby isolating the ion conduction current component for accurate impurity ion measurement without requiring complex shielding or filtering systems.
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 the accurate measurement of even minute amounts of impurity ions by isolating ion conduction currents, improving detection sensitivity and specificity for both inorganic and organic compounds.
Implementation Method 1
the transient current includes a current due to electron conduction in the measurement targeted organic substance and a current due to ion conduction of impurity ions
Implementation Method 2
the transient current includes a current due to electron conduction in the measurement targeted organic substance and a current due to ion conduction of impurity ions
Implementation Method 3
a measuring method using time of flight (TOF) is disclosed
Data Source
AI summary
A measuring container for measurement of impurity ions in a liquid includes: a first electrode; a first insulation film formed on the first electrode; a second insulation film formed apart from the first insulation film to create a space into which the liquid is to be sealed; a second electrode on which the second insulation film is formed, the second electrode being arranged to face the first electrode; and a seal material having an inlet through which the liquid is injected into the space, the seal material being configured to seal the space.