Focusing Microstructure Array for High Resolution Analyte Detection
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Solution Overview
Problem
Current devices for detecting analytes, especially biomolecules, face challenges in achieving high resolution due to a low signal/noise ratio for small sample volumes, which limits effective analysis.
Innovation Solution
A device comprising two materials forming a focusing microstructure with a focal point outside one material, offering high numerical aperture and achromatic properties, allowing for improved resolution and signal/background ratio through concentrated light collection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional optical detection methods are used, then the device structure remains simple, but the resolution is limited due to low signal/noise ratio for small sample volumes
Solution Approach 1:
The device divides the optical detection function into multiple microstructures distributed across the substrate. Each microstructure acts as an independent light-focusing element, collectively providing high resolution without requiring a single complex optical system. The array of microstructures segments the detection function to achieve superior performance.
Solution Approach 2:
The patent replaces conventional mechanical optical components (lenses, mirrors) with a planar array of microstructures that perform similar light-focusing functions through their geometric configuration. This substitution eliminates the need for bulky optical mechanisms while achieving the same detection precision.
2Reliability
If conventional optical detection is used, then the device remains simple, but the signal/background ratio is insufficient for small analyte volumes
Solution Approach 1:
The patent transitions from conventional single-point optical detection to a distributed array of microstructures that operate across multiple spatial dimensions. This dimensional expansion allows simultaneous collection of light from multiple locations, improving the signal/background ratio by accumulating signal strength across the array while maintaining simple individual element design.
Solution Approach 2:
The microstructures are designed with specific geometric parameters (curvature, height, width) that optimize light-focusing properties. By carefully controlling these parameters, the system achieves high signal/background ratio without requiring complex optical components, as the parameter optimization itself provides the necessary performance enhancement.
3Measurement precision
If high resolution below 30 nanometers is achieved, then analysis of small analyte volumes is enabled, but the device design becomes more complex
Solution Approach 1:
Each microstructure in the array is designed with locally optimized properties tailored to its specific position and function. The local quality of each element (curvature, height, width) is optimized to contribute to overall high resolution, while the simplicity of individual elements keeps the overall device design manageable. This distributed optimization achieves high precision without proportionally increasing complexity.
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 device achieves high resolution below 30 nanometers, enhancing the analysis of small analyte volumes and enabling applications in IC manufacturing and low-cost medical or bio applications with simplified designs.
Implementation Method 1
the first and the second material are so provided towards each other as to form at least one focusing microstructure with a focal point located outside of the first material
Implementation Method 2
due to the high numerical aperture n.NA>1, with n the refractive index and NA the geometrical aperture, a very high resolution is obtained
Implementation Method 3
increased collection efficiency due to re-direction and collection of scattered light from bottom hemi-sphere
Data Source
AI summary
A device includes first and second material facing towards each other as to form at least one focusing microstructure with a focal point located outside of the first material.