Pipelined Flow Cell Microarray for High-Throughput DNA Sequencing
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Solution Overview
Problem
Existing DNA sequencing techniques face limitations in increasing throughput due to the minimum distance requirements between reaction sites, which are constrained by the optical resolution of fluorescent microscopes, and the need for changing chemicals at every cycle.
Innovation Solution
A pipelined flow cell microarray is introduced, utilizing a combination of space and time multiplexing, where chemicals are independently delivered to reaction sites at different times, allowing for closer spacing and simultaneous imaging of multiple reactions without the need for large distances between sites.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If reaction sites are spaced closer together to increase throughput, then productivity increases, but measurement precision deteriorates due to optical resolution limits
Solution Approach 1:
The patent transitions from a single-plane reaction site arrangement to a three-dimensional structure using multiple layers (first layer and second layer of reaction sites) separated by a spacer. This vertical stacking in the Z-dimension allows reaction sites to be positioned closer in the XY-plane without optical interference, thereby increasing throughput while maintaining measurement precision through layer separation.
2Productivity
If multiple chemicals are delivered simultaneously to all reaction sites, then productivity increases, but device complexity increases due to requiring multiple independent fluidic networks
Solution Approach 1:
The patent implements a shared fluidic network where a single set of fluidic channels and vias serves multiple reaction sites across different layers. The fluidic network is designed to deliver different chemicals to different layers through the same physical infrastructure, eliminating the need for completely separate fluidic systems for each layer and reducing overall device complexity while maintaining parallel processing capability.
Solution Approach 2:
The patent divides the fluidic delivery system into segmentable components where chemicals can be delivered to different layers at different times through the same physical channels. This segmentation of the delivery process in time and space allows a single fluidic network to handle multiple chemicals for multiple reaction sites without requiring proportionally more complex infrastructure.
3Productivity
If reaction sites are arranged in a single layer, then device complexity is reduced, but productivity is limited by the area available for reaction sites
Solution Approach 1:
The patent adds a vertical dimension by creating a multi-layer structure with reaction sites positioned in both a first layer and a second layer, separated by a spacer. This transforms the reaction site arrangement from a two-dimensional planar layout to a three-dimensional configuration, effectively doubling the capacity for reaction sites within the same footprint area while managing complexity through systematic layer separation.
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
This approach enables a significant increase in DNA sequencing throughput by allowing for closer reaction site spacing and efficient imaging of multiple reactions, overcoming the optical resolution limitations and cycle duration constraints.
Implementation Method 1
reversible dye-terminators (RDTs) add one fluorescently-labeled nucleotide to a template (single-stranded DNA, for example) per cycle and determine the type of incorporated nucleotide based on the color of the fluorescent label
Data Source
AI summary
Systems, computer program products, and methods for using a flow cell array are provided herein. A computer program product includes a computer readable storage medium having program instructions embodied therewith, the program instructions executable by a device to cause the device to determine placement of multiple reaction site openings, wherein each reaction site opening is connected to a first sub-surface channel; connect the first sub-surface channel to two or more additional sub-surface channels by multiple vias; and provide a material for multiple reaction sites, wherein an overlap of the multiple reaction site openings and the material delineate the multiple reaction sites.