Example Wafer Used for MEMS Research:
Item #3330
50.8mm P/B <100>, 1-10 ohm-cm, 270µm SSP Prime Grade silicon wafer with 300nm thermal oxide.
Silicon Microstructures for MEMS Sensors
Piezoelectric MEMS sensors and acoustic emission (AE) sensors typically combine a precisely fabricated silicon microstructure with a thin piezoelectric film deposited on the substrate. These miniature resonant structures convert mechanical vibrations into electrical signals, enabling highly sensitive detection in industrial, automotive, aerospace, and biomedical applications.
The performance of MEMS resonators depends on several factors, including the substrate material, crystal orientation, wafer thickness, piezoelectric coefficient, electromechanical coupling coefficient, and mechanical quality factor (Q). These parameters determine resonance frequency, sensitivity, power consumption, and long-term device stability.
UniversityWafer supplies prime-grade silicon wafers, SOI wafers, thermal oxide wafers, and silicon nitride substrates for MEMS fabrication, thin-film deposition, and acoustic resonator research.
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Learn About Wideband Spectrum Sensing
Watch the video below to learn how MEMS acoustic resonators and piezoelectric devices are being developed for efficient wideband spectrum sensing and next-generation wireless communication systems.
What Are MEMS-Based Acoustic Resonators?
MEMS-based acoustic resonators are microfabricated devices that use mechanical vibration to filter, sense, or generate signals at specific frequencies. These devices are often built on silicon wafers because silicon offers excellent mechanical stability, precise microfabrication compatibility, and well-controlled electrical properties.
In many MEMS resonator designs, a silicon microstructure is combined with insulating layers, electrodes, and sometimes a piezoelectric film. The resonator vibrates at a target frequency determined by the device geometry, wafer thickness, material properties, and deposited thin films.
Silicon and Oxide Wafers for MEMS Resonator Research
Researchers have purchased thermal oxide coated silicon wafers for MEMS acoustic resonator fabrication and process development.
Why Wafer Properties Matter
For MEMS acoustic resonators, substrate specifications directly affect resonance behavior, fabrication yield, and device performance. Important wafer factors include crystal orientation, resistivity, thickness, flatness, surface roughness, oxide thickness, and compatibility with thin-film deposition or etching processes.
Silicon is commonly selected because it can be etched into precise resonant structures using MEMS fabrication methods. A thermal oxide layer can provide electrical insulation, masking, or surface passivation during device processing.
Common Applications
MEMS acoustic resonators are used in RF filters, timing references, sensors, acoustic wave devices, spectrum sensing, pressure sensing, biomedical devices, and low-power electronic systems. Their small size and wafer-level manufacturability make them useful for research in wireless communication, signal processing, and advanced sensor platforms.
Popular Substrates for MEMS Acoustic Devices
- Silicon wafers for resonant microstructures and MEMS process development
- Thermal oxide wafers for insulation, masking, and passivation
- SOI wafers for suspended structures and thickness-controlled device layers
- Silicon nitride coated wafers for membranes, masking, and mechanical support layers
- Sapphire substrates for high-frequency acoustic and RF applications
Choosing the right substrate helps researchers control resonance frequency, acoustic loss, electrical isolation, and device reliability during MEMS acoustic resonator fabrication.