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<\/a><\/figure>\n<\/div>\n\n\n\nannouncements<\/p>\n\n\n\n
Precision Ultrasound, Ready to Deploy: High-Performance PMUTs by 25FAB GmbH
25FAB GmbH is bridging the gap between advanced MEMS research and industrial-scale reality. We provide a full spectrum of Piezoelectric Micromachined Ultrasonic Transducers (PMUTs) ranging from 500 kHz to 60 MHz, engineered for medical imaging, aesthetic devices, and wearable diagnostics.<\/p>\n\n\n\n
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- In-Stock & Evaluation-Ready: 1024-element PMUT arrays available for immediate shipping.<\/li>\n\n\n\n
- Wafer-Level Customization: Tailored PMUT wafer design and fabrication to meet your specific frequency and sensitivity requirements.<\/li>\n\n\n\n
- Integrated Receiver Modules: Bespoke PMUT + ASIC + Flexible-Electrode solutions for seamless system integration.<\/li>\n\n\n\n
- Mass Production Scalability: Robust supply chain optimized for large-scale volume orders with guaranteed consistency.<\/li>\n\n\n\n
- The 25FAB Speed: Complete system-level co-design and delivery in under 4 months.<\/li>\n<\/ul>\n<\/div>\n\n\n\n\n
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\n\n\n\n\n\nmulti project runs<\/p>\n\n\n\n
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- mpw run – SIC 130 nm<\/a><\/li>\n\n\n\n
- Get Your Piezoelectric MEMS Chips in 3 Months<\/a><\/li>\n<\/ul>\n\n\n\n
mass production<\/p>\n\n\n\n
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- ultra-low R SiC 130 nm<\/a><\/li>\n\n\n\n
- Piezoelectric MEMS Chips – 8″ Wafers<\/a><\/li>\n<\/ul>\n<\/div>\n\n\n\n
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\n\n\n\nwafer process technology consulting<\/p>\n\n\n\n
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<\/figure>\n<\/div>\n<\/div>\n\n\n\n\nWe help semiconductor companies, research labs, and startups unlock the full potential of their fabrication processes. With deep expertise in photolithography, etching, deposition, and process integration, our consulting services are designed to improve yield, reduce costs, and accelerate innovation.<\/p>\n\n\n\n
From cleanroom workflow design and equipment selection to troubleshooting and technology transfer, we provide tailored guidance that meets your unique challenges. Our goal is to simplify the complexity of wafer fabrication, giving you the confidence to scale production and stay ahead in a rapidly evolving industry.<\/p>\n\n\n\n
Partner with us to transform your ideas into reliable, scalable technologies \u2014 and gain a competitive edge in the global semiconductor market.<\/p>\n<\/div>\n<\/div>\n\n\n\n
\n\n\n\nwafer fabrication<\/p>\n\n\n\n
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<\/figure>\n<\/div>\n\n\n\n\n25FAB Foundry: Advanced Piezoelectric MEMS & Hybrid MEMS-PIC Integration Capabilities<\/h2>\n\n\n\n
At 25FAB, we deliver world-class open-foundry services for piezoelectric micromachined ultrasonic transducers (PMUTs) and hybrid MEMS-Photonics integration. Our proven processes enable cutting-edge devices from research prototypes to volume production.
Highlight: Dual-Frequency Piezoelectric PMUT for Fundamental & Harmonic Imaging<\/p>\n\n\n\n(Published in IEEE MEMS 2023 \u2013 Top Conference in the Field)<\/p>\n\n\n\n
Gen 1 represents prior research conducted at Silicon Austria Labs (SAL), while Gen 2 features 25FAB\u2019s AlSc40%N technology operating at 1\u201350 MHz.<\/p>\n<\/div>\n<\/div>\n\n\n\n
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<\/figure>\n<\/div>\n\n\n\n\nWorld-Class 6-Inch SiCOI Substrates & Full Turnkey Fabrication Service (From Prototype to Volume Production \u2013 We Fab)<\/h2>\n\n\n\n
25FAB has successfully fabricated high-performance 6-inch high-purity semi-insulating SiCOI substrates that rival and exceed current industry benchmarks.<\/p>\n\n\n\n
Our SiCOI features 150 mm diameter, 522 nm uniform device layer, Ra 0.11 nm atomic smoothness, and sub-3 \u00b5m warp for unparalleled flatness and defect-free performance, already proven in real photonic and RF systems.<\/p>\n\n\n\n
All IP remains fully owned by the customer.<\/p>\n\n\n\n
Applications We Serve Integrated Photonics & Silicon Photonics (ultra-low-loss waveguides, high-Q microresonators, frequency combs)<\/p>\n\n\n\n
Next-Generation RF & mmWave (5G\/6G front-ends, phased arrays, satellite comms)<\/p>\n\n\n\n
Quantum Technologies (long-coherence color centers, scalable quantum photonic circuits) Harsh-Environment MEMS & Sensors (high-temperature, high-pressure, chemically robust platforms)<\/p>\n\n\n\n
We handle everything from your design to delivered wafers:
layout \u2192 MPW proof-of-concept \u2192 design freeze \u2192 dedicated volume runs.<\/p>\n<\/div>\n<\/div>\n\n\n\n\n\n![\"\"](\"https:\/\/25fab.ch\/wp-content\/uploads\/2026\/03\/fabrication1-1024x714.jpg\")
<\/figure>\n<\/div>\n\n\n\n\n25FAB \u2013 Your Single-Chip Solution for Piezoelectric-Tuned Photonics<\/h2>\n\n\n\n
Target Applications<\/p>\n\n\n\n
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- Tunable narrow-linewidth lasers & microwave photonic oscillators<\/li>\n\n\n\n
- Reconfigurable photonic integrated circuits (ROADMs, optical switches)<\/li>\n\n\n\n
- Ultra-linear phase modulators for coherent communication and RF photonics<\/li>\n\n\n\n
- Chip-scale LiDAR beam steering with piezo + photonics<\/li>\n\n\n\n
- Quantum photonics with fast piezo-tuned cavities<\/li>\n<\/ul>\n\n\n\n
One Partner, One Process, 200 mm wafers, MPW shuttles, dedicated runs
You bring the idea \u2013 we deliver the fully integrated, piezo-electrically tuned photonic chip with world-class optical and actuation performance.<\/p>\n<\/div>\n<\/div>\n\n\n\n\n\n![\"\"](\"https:\/\/25fab.ch\/wp-content\/uploads\/2026\/04\/111micromirror-add.jpg\")
<\/figure>\n<\/div>\n\n\n\n\nSingle-Crystal PZT Thin-Film MEMS Mirror<\/h2>\n\n\n\n
25FAB offers next-generation piezoelectric MEMS mirrors based on proprietary single-crystal PZT (PMN-PT) thin-film technology on 200 mm silicon wafers.
By achieving significantly higher piezoelectric performance than conventional polycrystalline PZT, our solution delivers clear system-level advantages:<\/p>\n\n\n\nWider optical field of view (up to 45\u00b0 \u00d7 35\u00b0)
Substantially lower power consumption (\u2264 55 mW)
Lower driving voltage (< 8 V AC)
Superior mirror flatness and optical quality<\/p>\n\n\n\nThese improvements make 25FAB\u2019s MEMS mirrors ideal for power-sensitive and high-performance applications such as AR\/XR smart glasses, automotive AR-HUD, pico-projectors, and solid-state LiDAR.
We provide engineering samples and actively seek joint development partnerships with leading technology companies.<\/p>\n<\/div>\n<\/div>\n\n\n\n\n\n
- Piezoelectric MEMS Chips – 8″ Wafers<\/a><\/li>\n<\/ul>\n<\/div>\n\n\n\n
- Get Your Piezoelectric MEMS Chips in 3 Months<\/a><\/li>\n<\/ul>\n\n\n\n
- mpw run – SIC 130 nm<\/a><\/li>\n\n\n\n