Micro-Reaction Detection Chip With Integrated Heating Control
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Solution Overview
Problem
Existing PCR technologies, particularly dPCR, face challenges with large device volume, complex operations, high costs, and difficulties in large-scale industrial production due to reliance on silicon substrates.
Innovation Solution
A detection chip design featuring a first substrate with micro-reaction chambers and a heating electrode, including electrode portions with varying resistances, a hydrophilic and hydrophobic layer, and a control circuit for efficient temperature control, enabling integration and cost-effective large-scale production.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional dPCR technology is used, then detection sensitivity and accuracy are improved, but device volume and operational complexity increase
Solution Approach 1:
The device is segmented into an integrated chip that combines multiple functions (reaction chambers, heating electrodes, fluidic channels, and detection components) into a single microfabricated unit. This segmentation reduces operational complexity while maintaining detection accuracy by eliminating the need for separate external equipment for each function.
Solution Approach 2:
The chip is designed with self-contained temperature control through integrated heating electrodes and insulation structures, self-regulated fluid flow through microfluidic channels, and automatic reaction conditions management. This self-service design reduces operational complexity by eliminating the need for external control systems while preserving detection accuracy.
2Measurement precision
If silicon substrates are used for dPCR, then detection performance is improved, but manufacturing cost and production scalability worsen
Solution Approach 1:
The invention changes the substrate material parameter from silicon to alternative materials such as glass, plastic, or quartz that are more suitable for large-scale manufacturing. This parameter change maintains detection performance through optimized microstructure design while dramatically improving ease of manufacture and production scalability through compatibility with standard semiconductor fabrication processes.
Solution Approach 2:
The chip design enables mass production through standardized fabrication processes that can replicate identical chip structures at scale. By using materials and processes compatible with industrial manufacturing, the invention allows for copying the exact same chip design thousands of times, achieving economies of scale that reduce cost while maintaining consistent detection performance.
3Temperature
If heating electrode is placed closer to micro-reaction chambers, then temperature control precision is improved, but heat loss to surrounding areas increases
Solution Approach 1:
The chip employs local quality optimization by placing heating electrodes in direct contact with or immediately adjacent to micro-reaction chambers where heating is needed, while simultaneously providing thermal insulation to specific areas to prevent heat loss. This localized approach to thermal management achieves precise temperature control in the reaction zones without excessive energy loss to surrounding areas.
Solution Approach 2:
The invention introduces thermal insulation layers or structures as intermediaries between the heating electrodes and the surrounding environment. These intermediary insulation layers confine heat within the micro-reaction chambers, allowing the heating electrodes to be positioned close to the chambers for precise temperature control while preventing heat loss to adjacent areas through the insulating barrier.
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 chip achieves precise temperature control, improves detection accuracy, and facilitates large-scale standardized production, supporting applications in single-cell analysis and early disease diagnosis.
Implementation Method 1
a heating electrode on the first substrate and closer to the first substrate than the micro-cavity definition layer, configured to release heat after being energized
Data Source
AI summary
A detection chip, a method for manufacturing a detection chip, and a method for operating a detection chip are disclosed. The detection chip includes a first substrate, a micro-cavity definition layer, and a heating electrode. The micro-cavity definition layer defines a plurality of micro-reaction chambers, adjacent micro-reaction chambers are at least partially spaced apart from each other, and each of the plurality of micro-reaction chambers comprises a sidewall and a bottom, the sidewall and the bottom of each of the plurality of micro-reaction chambers is covered with a hydrophilic layer, and a spacing region between the plurality of micro-reaction chambers is covered with a hydrophobic layer. The heating electrode is configured to release heat after being energized. The heating electrode includes a first electrode portion and at least one second electrode portion electrically connected to the first electrode portion and located at a periphery of the first electrode portion.