Semiconductor Chip Thermal Control for Portable Nucleic Acid Amplification
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Solution Overview
Problem
Conventional real-time PCR instruments are bulky, costly, and lack portability due to complex thermal management and optical detection systems, which complicates disease diagnosis and increases costs, especially in resource-limited settings where portable and disposable diagnostic tools are needed.
Innovation Solution
A semiconductor chip-based apparatus with integrated temperature and light sensors, a biocompatible coating, and a microprocessor for automated real-time PCR, housed in a portable cartridge, enables precise temperature control and optical sensing, allowing for efficient nucleic acid amplification and detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If conventional thermal management systems with large thermal capacity structures are used, then precise temperature control is achieved, but device size and portability are compromised
Solution Approach 1:
The patent replaces conventional mechanical thermal management systems (large heating blocks, cooling reservoirs) with integrated semiconductor-based thermal control components. The semiconductor chip incorporates embedded heating elements and temperature sensors that directly contact the reaction chamber, enabling precise temperature cycling without requiring bulky external thermal management hardware.
Solution Approach 2:
The patent merges multiple functions into a single integrated semiconductor chip: temperature control (heating and cooling), temperature sensing, and optical detection are all integrated into one compact device. This consolidation eliminates the need for separate conventional thermal cyclers and optical systems, achieving both precise temperature control and small device footprint.
2Measurement precision
If discrete optical components are used for real-time monitoring, then detection capability is achieved, but device complexity and size increase
Solution Approach 1:
The patent replaces discrete optical components (photo multipliers, discrete photodiodes, CCD sensors, lenses, filters) with an integrated optical detection system built into the semiconductor chip. The chip includes photodetectors and associated signal processing circuitry that directly monitor PCR product accumulation in real-time, eliminating complex external optical pathways and mechanical scanning systems.
Solution Approach 2:
The patent combines optical detection functionality with the semiconductor substrate, merging the detector, signal processing electronics, and data analysis capabilities into a single integrated unit. This integration achieves real-time monitoring capability while dramatically reducing device complexity compared to conventional systems that require separate optical modules and motion control systems.
3Productivity
If motion control systems are used to position multiple samples, then multi-sample processing is achieved, but device size and cost increase
Solution Approach 1:
The patent segments the semiconductor chip into multiple independent reaction chambers, each capable of simultaneous PCR processing. The chip surface is divided into discrete zones with individual temperature control and optical detection for each chamber, enabling parallel processing of multiple samples without requiring mechanical positioning systems.
Solution Approach 2:
The patent transitions from sequential sample processing (requiring motion control in one dimension) to parallel processing by utilizing the two-dimensional surface of the semiconductor chip. Multiple reaction chambers are arranged spatially on the chip surface, allowing simultaneous processing of multiple samples in different locations, effectively adding a spatial dimension to productivity.
4Adaptability or versatility
If conventional bulky instruments are used, then comprehensive PCR functionality is achieved, but portability and ease of use are compromised
Solution Approach 1:
The patent merges thermal management, optical detection, sample processing, and data analysis functions into a single portable semiconductor chip device. This integration maintains comprehensive PCR functionality while reducing the system to a handheld or benchtop size, enabling portability for point-of-care diagnostics and field applications.
Solution Approach 2:
The semiconductor chip is designed as a universal platform that can perform multiple PCR-related functions: thermal cycling for DNA amplification, real-time optical monitoring of reaction progress, multi-sample parallel processing, and integrated data analysis. This multi-functionality is achieved in a single compact device, providing the versatility of conventional instruments with the portability needed for diverse application settings.
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 solution provides a cost-effective, portable, and disposable diagnostic tool for nucleic acid amplification, enhancing sample-to-sample reproducibility and sensitivity while reducing the complexity and size of PCR systems, making it suitable for point-of-care diagnostics.
Implementation Method 1
a heating element, where the heating element is configured to heat the sample responsive to instructions provided by the processor
Implementation Method 2
a temperature sensor is formed on the substrate, where the temperature sensor is configured to detect the sample's temperature
Implementation Method 3
the substrate comprises a light sensor configured to measure light emission from the sample
Data Source
AI summary
Described herein is a chip-based apparatus for amplifying nucleic acids, a cartridge housing the apparatus, and methods of using the apparatus for amplification of nucleic acids. More specifically, this invention provides integrated semiconductor chip, manufactured with standard semiconductor manufacturing process, with on-chip circuitry to perform thermal management and optical sensing necessary for amplification of nucleic acids. The apparatus and methods embodied in this invention makes it possible to build a disease diagnosis and prognosis tool that is easy to use, portable and disposable.