BAW Resonator Structure for Label-Free Viral Detection
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Solution Overview
Problem
Current methods for detecting viral infections, such as COVID-19, are slow, expensive, and require centralized laboratories, making them impractical for rapid and accurate on-site diagnosis, especially due to the small size and low weight of viruses, which complicates detection and requires sensitive and portable diagnostic tools.
Innovation Solution
The development of bulk acoustic wave resonators that operate in a thickness extensional main resonant mode, utilizing multilayer metal acoustic reflector electrodes and harmonically tuned top sensor electrodes, coupled with piezoelectric layers, to sense analytes like viruses in a fluid, enabling label-free, real-time, and highly sensitive detection without the need for fluorescent tags or chemical labels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional laboratory-based assays are used for viral detection, then detection accuracy can be maintained, but detection speed and accessibility deteriorate due to centralized processing requirements
Solution Approach 1:
The patent divides the centralized laboratory detection system into distributed micro-resonator units that can operate independently at point-of-care locations. Each micro-resonator is a self-contained detection unit with piezoelectric layers and acoustic reflectors, enabling localized viral particle detection without requiring centralized laboratory processing.
Solution Approach 2:
The patent replaces traditional mechanical/chemical laboratory assays with acoustic wave-based detection using piezoelectric micro-resonators. The system uses thickness extensional acoustic waves generated by piezoelectric layers to detect viral particles through mass loading effects, eliminating the need for complex mechanical laboratory equipment and chemical reagents.
2Measurement precision
If sensitive detection methods are developed to detect small viral particles, then detection capability improves, but device complexity and cost increase
Solution Approach 1:
The patent employs thickness extensional acoustic wave resonance in piezoelectric layers to detect viral particles. The micro-resonators operate at specific resonant frequencies, and viral particle binding causes measurable frequency shifts. This vibration-based detection method provides high sensitivity for small mass changes while maintaining relatively simple device architecture compared to other ultra-sensitive detection techniques.
Solution Approach 2:
The patent detects viral particles by monitoring changes in resonant frequency parameters of the piezoelectric micro-resonators. As viral particles bind to the resonator surface, they add mass that shifts the resonant frequency, providing a direct and sensitive measurement method. The system also monitors quality factor changes to enhance detection capability.
3Reliability
If centralized laboratory processing is used, then comprehensive analysis can be performed, but accessibility and speed for on-site diagnosis deteriorate
Solution Approach 1:
The patent designs universal piezoelectric micro-resonator platforms that can detect multiple types of viral particles and potentially other biomolecules using the same basic device architecture. The resonators can be functionalized with different receptor molecules to target specific viruses, providing a versatile point-of-care diagnostic solution that maintains reliability across different pathogens while enabling widespread accessibility.
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 allows for rapid, accurate, and cost-effective detection of viral pathogens like COVID-19 at the point of need, offering higher sensitivity and mass detection capabilities within the Super High Frequency band, facilitating quick and reliable on-site diagnosis.
Implementation Method 1
coupled with piezoelectric layers, to sense analytes like viruses in a fluid
Implementation Method 2
utilizing multilayer metal acoustic reflector electrodes and harmonically tuned top sensor electrodes
Implementation Method 3
operate in a thickness extensional main resonant mode
Implementation Method 4
enabling label-free, real-time, and highly sensitive detection without the need for fluorescent tags or chemical labels
Data Source
AI summary
Techniques for improving Bulk Acoustic Wave (BAW) resonator structures are disclosed, including fluidic systems, oscillators and systems that may include such devices. A bulk acoustic wave (BAW) resonator may comprise a substrate and a first layer of piezoelectric material. The bulk acoustic wave (BAW) resonator may comprise a top electrode. A sensing region may be acoustically coupled with the top electrode of the bulk acoustic wave (BAW) resonator.