In the face of increasing difficulties in supplying quartz crystals for strategic applications such as space, defense and medical, Cristal Innov has resumed European production of very high-quality quartz and wafers.
Bars
Bars are from pure Z-zone, with or without seed, Y0, or pre-oriented for a specified cut (AT, SC…)
Blanks or wafers
- Cuts (AT, SC, Z, X…)
- Lapped, single side or double side polished
- 5 mm to 150 mm
Customized products
Very high-quality quartz
Quality criteria according to IEC 60758 standard
Right-handed quartz only | ||
Infrared extinction coefficient: by Fourier Transform Infrared (FTIR) spectrometry | α3500cm-1 < 0,026 Equivalent à un α3585cm-1 < 0,015 ou α3410cm-1 < 0,075 | |
Inclusion density: by visual inspection under high intensity light with index liquid | 10 – 30 µm : N < 2 30 - 70 µm : N <1 70 - 100 µm : N <0 > 100 µm : N < 0 | |
Etch channel density by channels counting in an etched AT-cut slice | < 5/cm2
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Impurity level: By mass ICP-MS | Al, Fe, Na, K, Mg, Ca < 1 ppm | |
Dislocation density by X-ray topography | < 30/cm2
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Pure Premium Quartz
Very high quality, radiation hardened quartz for high performance devices
General
Chemical formula | SiO2 Quartz‐α |
Handedness | Right
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Density | 𝜌=2.65 𝑔/𝑐𝑚^3 |
Crystal System | Trigonal -Hexagonal a=4.91 Å - α=90° b=4.91 Å - β=90° c=5.41 Å - γ=120° |
Mohs Hardness | 7 |
𝑇 Quartz-‐α > β | 573.3°𝐶
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Applications
Product | Device/applications
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Quartz crystal unit | High precision oscillators
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IMU (Inertial Measurement Unit) | PNT (Position, Navigation, Time)
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SAW resonators | Sensors and filters
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Optical quartz plates | lenses, prisms… |
Hydrothermal synthesis
Cristal Innov has specialized in the crystallization of very high-quality quartz, by mastering the material, the specific cuts, and their characterization.
Both very slow growth rates – inhibiting the formation of defects –, and reproducibility make it possible to produce high-performance crystals for piezoelectric applications:
- ultra-stable, low-noise resonators/oscillators
- SAW sensors, inertial navigation system (accelerometers, gyroscopes…)