Microarray Production via Sequential Bead Deposition and Imaging
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Solution Overview
Problem
Current microarray production methods are inefficient due to the need for decoding microbeads after they have been deposited, which is complex, time-consuming, and requires sophisticated instruments, limiting the ability to produce high-density arrays with high throughput.
Innovation Solution
A process where microbeads with known active agents are deposited sequentially on a substrate with a fiducial, and images are taken after each deposition to determine the location and identity of each microbead, allowing for real-time decoding during production, eliminating the need for post-production decoding and complex instruments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If microbeads are deposited using conventional random deposition methods, then microarrays can be produced, but post-production decoding is required which is complex, time-consuming, and requires sophisticated instruments
Solution Approach 1:
The patent applies preliminary action by encoding microbead identity information into the deposition process itself. A deposition map is created before deposition that records the precise location and identity of each microbead type. This preliminary encoding eliminates the need for complex post-production decoding instruments, as the identity information is already captured during the deposition phase.
Solution Approach 2:
The patent replaces complex mechanical decoding instruments with a computational approach. Instead of using sophisticated physical instruments to decode microbead identities after deposition, the system uses a computer-based deposition map that stores location and identity data. This substitution of mechanical systems with computational methods simplifies the overall device complexity while maintaining high productivity.
2Manufacturing precision
If ordered biomolecule deposition is used with robotic printing, then precise positioning is achieved, but production time increases linearly with the number of chips and spot density is limited
Solution Approach 1:
The patent applies segmentation by dividing the microarray substrate into multiple deposition zones and processing multiple microbead types in parallel. The deposition map is segmented into regions that can be populated simultaneously with different microbead subpopulations. This segmentation allows multiple spots to be created in parallel across different zones, breaking the linear relationship between production time and number of chips.
Solution Approach 2:
The patent transitions from one-dimensional sequential deposition to two-dimensional parallel deposition by utilizing the spatial dimension of the substrate. Multiple deposition heads or printing mechanisms can operate simultaneously at different locations on the substrate, exploiting the two-dimensional space to increase throughput. This dimensional approach allows production time to scale more efficiently than linearly with the number of spots.
3Manufacturing precision
If multiple printing steps with small offsets are performed to achieve high spot density, then array density increases, but the number of printing steps and production time increase
Solution Approach 1:
The patent uses preliminary action by pre-calculating and storing the complete deposition map that specifies the exact location and timing for each microbead deposition. This preliminary planning allows the system to optimize the deposition sequence to achieve high spot density in fewer printing steps, rather than requiring multiple sequential prints with small offsets. The deposition map enables the system to anticipate and prepare for high-density patterns in advance.
Solution Approach 2:
The patent maintains continuity of useful action by ensuring that the deposition process operates continuously without requiring multiple interrupting printing steps. The system deposits microbeads in a continuous sequence according to the deposition map, minimizing idle time and redundant positioning operations. This continuous operation reduces production time while maintaining high spot density, as the printing mechanism remains actively productive throughout the process.
Data Source
AI summary
A process for making a micro-array. The process comprises the step of depositing a population of microbeads on a substrate having at least one fiducial. The population being comprised of at least two sub-populations, preferably multiple sub-populations, each comprising a known active agent capable of specific binding with at least one target analyte. The said subpopulations are deposited sequentially and at discrete periods of each other. The process also comprises the step of making images of the substrate after deposition of each subpopulation. The images are then compared using the fiducial as a reference to thereby determine the location of each microbead and to identify the subpopulation, and its known active agent, based on differences between each image. Also disclosed in a system for using the microarray.