Patterned Resistive Trace for IMS Drift Chamber
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Solution Overview
Problem
Ion mobility spectrometry systems face challenges with high costs, complex assembly, frequent maintenance, and reliability issues due to multi-section charged material transportation chambers and single-piece chambers with non-uniform and unstable resistance.
Innovation Solution
A charged material transportation chamber made of non-conductive or semi-conductive material with a patterned resistive trace deposited on its surface, connecting to a source of electrical energy, which provides a uniform electric field and reduces maintenance needs by minimizing gaps for contaminant accumulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multi-section charged material transportation chambers are used, then the ion detection capability is improved, but the device complexity and maintenance frequency increase
Solution Approach 1:
The chamber is divided into multiple sections (drift region, reaction region, source region) that can be independently configured and assembled, allowing complex ion detection functionality to be achieved through modular components rather than a single complex piece
Solution Approach 2:
The patterned resistive trace is deposited directly onto the interior surface of the chamber, nesting the conductive element within the chamber structure itself, eliminating the need for separate conductive components and reducing assembly complexity
2Measurement precision
If multi-section charged material transportation chambers are used, then the ion detection capability is improved, but the maintenance burden increases
Solution Approach 1:
The patterned resistive trace provides sufficient conductive pathways throughout the chamber without requiring excessive conductive material or complex electrode structures, simplifying both the design and maintenance of the system
Solution Approach 2:
The patterned resistive trace on the chamber interior surface eliminates the need for separate conductive components that would require alignment and connection during assembly and maintenance, making the system more self-contained and easier to service
3Device complexity
If single-piece chambers with continuous conductive coating are used, then the assembly complexity is reduced, but the resistance uniformity and stability deteriorate
Solution Approach 1:
The patterned resistive trace creates localized conductive pathways at specific positions within the chamber, allowing different regions to have optimized resistance characteristics rather than relying on a uniform coating that cannot achieve both simplicity and uniformity
4Device complexity
If single-piece chambers with continuous conductive coating are used, then the assembly complexity is reduced, but the detection quality deteriorates
Solution Approach 1:
The patterned resistive trace provides localized conductive regions that create more uniform electric fields in critical detection areas, improving ion mobility measurement precision while maintaining simpler assembly compared to multi-section chambers
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
The solution reduces maintenance costs and improves reliability by providing a consistent and uniform electric field, enhancing the quality of ion detection and reducing the complexity of assembly in ion mobility spectrometry systems.
Implementation Method 1
A patterned resistive trace is deposited on one or more of an interior surface or an exterior surface of the charged material transportation chamber. The patterned resistive trace is configured to connect to a source of electrical energy.
Implementation Method 2
Ion mobility spectrometry refers to an analytical technique that can be used to separate and identify ionized material materials, such as molecules and atoms. Ionized material can be identified in the gas phase based on mobility in a carrier buffer gas exposed to an electric field.
Implementation Method 3
The inlet assembly includes an inlet for receiving a sample, a reaction region for ionizing the sample, and a gate for controlling entrance of the ionized sample to the charged material transportation chamber.
Data Source
AI summary
An ion detection assembly is described that includes a drift chamber, an inlet assembly, and a collector assembly. The drift chamber is formed of substantially non-conductive material and/or semi-conductive material. A patterned resistive trace is deposited on one or more of an interior surface or an exterior surface of the drift chamber. The patterned resistive trace is configured to connect to a source of electrical energy. The inlet assembly and the collector assembly are in fluid communication with the drift chamber. The inlet assembly includes an inlet for receiving a sample, a reaction region for ionizing the sample, and a gate for controlling entrance of the ionized sample to the drift chamber. The collector assembly includes a collector plate for collecting the ionized sample after the ionized sample passes through the drift chamber.