2D Nanoparticle Motion Sensing via Planar Electrodes
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Solution Overview
Problem
Existing 3-D capacitive sensing techniques suffer from accuracy and performance issues due to their circular and out-of-plane structures, necessitating the development of alternative two-dimensional (2-D) capacitive sensing methods for effective material movement detection.
Innovation Solution
A 2-D capacitive sensing system comprising a two-dimensional electrode structure with integrated circuits to mitigate external interference and a data acquisition device, featuring conductive electrodes on parallel planes with dielectric materials in between, connected via conductive lines and vias, allowing for capacitive sensing and particle detection with enhanced accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If 3-D circular sensing structures are used, then the sensing coverage is increased, but the measurement precision and sensitivity are reduced
Solution Approach 1:
The patent transitions from traditional 3-D circular sensing structures to a 2-D planar electrode configuration. This dimensional change enables the sensing structure to achieve both large sensing coverage and high measurement precision by arranging electrodes in parallel planes with controlled spacing, eliminating the geometric limitations of circular out-of-plane structures
2Device complexity
If 3-D out of plane sensing structures are used, then the structural simplicity is maintained, but cross-talk and physical interference increase
Solution Approach 1:
The sensing structure is segmented into multiple parallel electrode planes with distinct functional zones. This segmentation isolates signal paths and reduces electromagnetic cross-talk between adjacent sensing regions while maintaining structural simplicity through standardized planar electrode patterns
Solution Approach 2:
Dielectric materials are introduced as intermediaries between the parallel electrode planes to control and minimize physical interference and cross-talk. These dielectric layers provide electrical isolation while allowing capacitive coupling for sensing, effectively mediating the interaction between adjacent electrodes
3Measurement precision
If integrated circuits are added to mitigate external interference, then the measurement precision is improved, but the device complexity increases
Solution Approach 1:
Multiple electrode planes and their associated readout circuits are merged into a single integrated circuit device. This integration consolidates what would otherwise be separate components, improving measurement precision through coordinated signal processing while minimizing the increase in overall device complexity through monolithic fabrication
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 system minimizes cross-talk and physical interference, enabling the detection of particles down to 200 nm in size with improved sensitivity and accuracy, effectively addressing the limitations of existing 3-D sensing techniques.
Implementation Method 1
a (2-D) two-dimensional electrode structure, where the two-dimensional sensing structure includes a channel for capacitive sensing
Data Source
AI summary
A method, structure and system for capacitive sensing is provided. A system includes: a two-dimensional electrode structure, wherein the two-dimensional sensing structure includes a channel for capacitive sensing, at least one integrated circuit connected to the two dimensional sensing structure and configured to mitigate external interference associated with the capacitive sensing by i) receiving a input signal from the two-dimensional electrode structure or ii) providing a select signal to the two-dimensional structure, and a data acquisition device connected to the two-dimensional electrode structure via the integrated circuit configuration and configured to receive an output signal from the integrated circuit.