BAW Resonator Structure for Rapid Label-Free Virus Sensing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current methods for detecting viral infections, such as COVID-19, are slow, expensive, and require centralized laboratories, making them inadequate for rapid and accurate on-site diagnosis, especially due to the small size and low weight of viruses, which complicates detection in remote or field settings.
Innovation Solution
The development of bulk acoustic wave resonator structures 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 detection with high sensitivity by detecting resonance frequency shifts caused by biomolecule binding.
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 viral detection function into segmented structures including multiple piezoelectric layers, metal acoustic reflector electrodes, and sensing regions within the bulk acoustic wave resonator. This segmentation enables the device to be miniaturized and deployed as portable point-of-care devices rather than requiring centralized laboratory processing, thereby reducing detection time while maintaining accuracy through specialized functional zones.
Solution Approach 2:
The patent replaces traditional mechanical/chemical laboratory assay systems with an acoustic field-based detection system using bulk acoustic wave resonators. The resonators detect viral particles through acoustic wave interactions and resonance frequency shifts, eliminating the need for complex mechanical laboratory equipment and enabling rapid portable detection while maintaining measurement precision.
2Reliability
If traditional laboratory equipment is deployed for viral detection, then detection capability is sufficient, but device complexity and transport difficulty increase
Solution Approach 1:
The patent extracts the essential detection function from complex laboratory equipment and concentrates it into a single integrated bulk acoustic wave resonator device. By taking out only the core sensing capability and eliminating unnecessary laboratory infrastructure, the device achieves reliable viral detection with minimal complexity, making it suitable for portable deployment in field settings.
Solution Approach 2:
The patent designs the bulk acoustic wave resonator to perform multiple functions within a single device: generating acoustic waves, sensing viral particles, and providing electrical readout signals. This multi-functionality eliminates the need for separate laboratory equipment for each detection step, reducing overall device complexity while maintaining reliable detection capability across different viral targets.
3Ease of manufacture
If conventional detection methods are used, then infrastructure requirements are met, but cost and accessibility worsen due to centralized laboratory dependencies
Solution Approach 1:
The patent transitions the detection system from a centralized three-dimensional laboratory infrastructure to a two-dimensional integrated circuit-compatible resonator structure that can be manufactured using standard semiconductor fabrication processes. This dimensional change enables mass production and deployment across multiple locations, improving adaptability for on-site use while maintaining manufacturing feasibility through established industrial processes.
Solution Approach 2:
The patent utilizes changes in acoustic wave parameters (frequency, wavelength, resonance characteristics) to detect viral particles, replacing the need for complex reagent-based chemical parameters used in traditional assays. This parameter change enables the device to be manufactured with stable physical properties and deployed universally across different locations without requiring location-specific calibration or infrastructure adjustments.
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 highly sensitive and selective, real-time detection of viruses like COVID-19 without the need for fluorescent tags or chemical labels, facilitating rapid and accurate on-site diagnosis with improved mass sensitivity in the Super High Frequency band.
Implementation Method 1
stacks of piezoelectric material layers may respectively be sandwiched between respective multilayer metal acoustic reflector electrodes and respective harmonically tuned top electrode top sensor electrodes
Implementation Method 2
operate in a thickness extensional main resonant mode... to sense analytes like viruses in a fluid, enabling label-free, real-time detection with high sensitivity by detecting resonance frequency shifts caused by biomolecule binding
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.