Optical and Electrical Barrier Layout for Secondary Path Noise Rejection
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Solution Overview
Problem
Instruments for massively-parallel sample analysis are typically limited to laboratory settings due to their large size, lack of portability, need for skilled operation, power requirements, and high cost, leading to long wait times for results when samples are analyzed in the field.
Innovation Solution
An integrated device with optical and electrical barriers to block secondary optical and electrical paths, using components like metal layers and doped semiconductor regions to prevent unwanted photons and charge carriers from reaching storage bins, improving noise performance and enabling portable, efficient sample analysis.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If barriers are added to block secondary paths, then noise performance is improved, but device complexity increases
Solution Approach 1:
The patent combines optical barriers and electrical barriers into a single integrated device structure. The optical barrier (at least partially opaque component) and electrical barrier (doped semiconductor region) are integrated within the same photodetection device, allowing simultaneous blocking of photons and charge carriers along secondary paths without requiring separate devices. This merging approach improves noise performance while minimizing the increase in device complexity.
Solution Approach 2:
The patent introduces barrier structures as intermediary elements between the photodetection region and storage bins. These barriers act as mediators that selectively block unwanted photons and charge carriers along secondary paths while allowing desired signals to pass through the primary path. The barriers are positioned at strategic intermediate locations to achieve noise reduction without overly complicating the overall device architecture.
2Volume of moving object
If integrated device is made compact, then portability is improved, but manufacturing precision requirements increase
Solution Approach 1:
The patent segments the photodetection device into distinct functional regions: photodetection region, optical barrier, electrical barrier, and storage bins. This segmentation allows each component to be optimized and manufactured separately with standard precision requirements, then integrated into a compact overall structure. The segmented approach enables portability improvements without excessively increasing manufacturing precision demands.
Solution Approach 2:
The patent positions the storage bins at a distance from the photodetection region along the primary path, utilizing spatial dimensionality to achieve compact integration. By arranging components in three-dimensional space rather than requiring large planar areas, the device achieves compact volume suitable for portability while maintaining manufacturable precision tolerances for each individual component.
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 enhances the ability to perform compact, portable sample analysis, reducing noise interference and enabling rapid results, suitable for point-of-care genetic sequencing and personalized medicine applications.
Implementation Method 1
an optical barrier configured to block at least some photons from reaching the one or more charge storage bins
Implementation Method 2
a photodetection region configured to receive emission photons along a first portion of a primary path
Data Source
AI summary
Described herein are techniques to reduce or remove the impact of secondary path photons and/or charge carriers on storage bins of an integrated device to improve noise performance, and thus, sample analysis. Some embodiments relate to optical rejection techniques such as including an optical barrier positioned to block at least some photons from reaching the storage bins. Some embodiments relate to electrical rejection techniques such as including an electrical barrier configured to block at least some charge carriers from reaching the storage bins along at least one secondary path. Some embodiments relate to an integrated device in which at least one storage bin is shaped and/or positioned relative to the photodetector to facilitate receipt of some charge carriers (e.g., fluorescent emission charge carriers) and/or photons and to impede receipt of other charge carriers (e.g., noise charge carriers) and/or photons.