Optical Grade Quartz Single Crystal Wafer
OST Photonics offer a variety of sizes and thicknesses of optical grade quartz single crystal wafers, with wafer diameters ranging from 1 inch to 4 inch,...
Optical Grade Quartz Single Crystal Wafer
OST Photonics offer a variety of sizes and thicknesses of optical grade quartz single crystal wafers, with wafer diameters ranging from 1 inch to 4 inch, the thickness can be customized according to your requirements (generally above 0.05 mm). The orientations can be X/Y/Z-cut etc. In addition, high quality quartz blanks (including left handed quartz) are also available.
- ManufacturerOST Photonics
- CategoryCrystal Wafer and Substrate
- Lead TimeQuoted per order
- CustomizationSize, orientation and surface finish to drawing
Specifications of Optical Grade Quartz Single Crystal Wafers
| Material | Quartz Crystal | |
| Cutting Angle | X/Y/Z-cut etc | |
| Diameter | 1”(25.4mm)~4”(100mm) | |
| Diameter Tolerance(±) | ≤0.20 mm | |
| Thickness | 0.05mm or more | |
| LTV (5mmx5mm) | <1µm | |
| TTV | <3µm | |
| Bow | -30<bow<30 | |
| Warp | <40µm | |
| Surface Type | Single side polished(SSP)/double sides polished(DSP) | |
| Polished side Ra | <0.5nm | |
| Back Side Criteria | General is 0.2-0.5µm or as customized | |
| Scratch/Dig | Bette than 40/20 | |
| Edge Criteria | Compliant with SEMI M1.2 Standard/refer to IEC62276 | |
| Material Property | ECD | Better than grade 4 |
| Inclusion | Better than grade I | |
| Q-Value | Better than grade C | |
| Wafer Surface Criteria | Particles φ>0.3 µm | <= 30 |
| Scratch , Chipping | None | |
| Defect | No edge cracks, scratches, saw marks, stains | |
| Packaging | Qty/Wafer box | 25pcs per box |
Parameters of Optical Grade Quartz Single Crystal Blanks
| Material | Grade | Dimension | Inclusion | Q-value | Optical homogeneity |
| Quartz | Optical | Z: 135mmX: 150mmY: 240-280mm | IEC Class I | >2.40 million | 1*10^-5 |
| Quartz | Laser | Z<40mmX<110mmY< 200mm | Better than IEC Claas IA | >2.40 million | 5*10^-6 |
Properties of Optical Grade Quartz Single Crystal Wafers
| Density, g/cm3 | 2.65 |
| Melting point, °C | 1467 |
| Thermal conductivity, W/(m x K) (T = 25°C) | 10.7 (parallel to axis Z) 6.2 (perpendicular to axis Z) |
| Thermal coefficient of linear expansion at temperature range 0-25°Ñ, °C^-1 | 7.1 õ 10^-6 (parallel to axis Z) |
| 13.2 õ 10^-6 (perpendicular to axis Z) | |
| Hardness (Mohs) | 7 |
| Specific heat capacity, J/(kg x K) (T = 25°C) | 710 |
| Dielectric constant at 30 MHz | 4.34 (parallel to axis Z) 4.27 (perpendicular to axis Z) |
| Young’s modulus (E), GPa | 97.2 (parallel to axis Z) 76.5 (perpendicular to axis Z) |
| Shear modulus (G), GPa | 31.14 |
| Bulk modulus (K), GPa | 36.4 |
| Chemical stability | insoluble in water |
| Elastic coefficients | C11=87 C12=7 C44=58 C13=13 C14=18 C33=106 |
Synthetic Crystal Quartz Refractive Index VS Wavelength
| l, mm | n0 | ne | l, mm | n0 | ne | l, mm | n0 | ne |
| 0.185 | 1.676 | 1.69 | 0.243 | 1.605 | 1.617 | 0.589 | 1.544 | 1.553 |
| 0.194 | 1.66 | 1.673 | 0.263 | 1.593 | 1.604 | 1.083 | 1.534 | 1.543 |
| 0.204 | 1.643 | 1.656 | 0.291 | 1.581 | 1.591 | 1.8 | 1.524 | 1.532 |
| 0.219 | 1.625 | 1.637 | 0.34 | 1.567 | 1.577 | 2.5 | 1.512 | 1.52 |
| 0.231 | 1.614 | 1.626 | 0.405 | 1.557 | 1.567 | 3 | 1.5 | 1.507 |
Quality Evaluation of Synthetic Quartz Crystal
a) The amount of crystal defect and impurity in synthetic quartz crystal depends on growth rate, mineralizer and raw material. The growth rate affects greatly to the important properties such as infra-red absorption coefficient α, which correlates to Q value, and frequency –temperature characteristics. The larger growth rate causes increase in α, decrease in Q value, and dispersion in frequency-temperature characteristics.
b) The quality index of synthetic quartz crystal was originally a Q value, and a 5 MHz quartz crystal unit operated in 5th overtone mode was used to obtain the Q value. But it required laborious work to fabricate the 5 MHz crystal unit, so the index had been changed to the coefficient α instead of the Q value.
Quality Evaluation of Synthetic Quartz Crystal
a) Twinning: There shall be no electrical or optical twinning in the usable region.
b) Strain: There shall be no strain contained both inside and surface of seed crystal as well as in a grown quartz crystal.
c) Cracks and fractures: There shall be no cracks, chippings or fractures in the usable region.
d) Inclusion density: The specification is in accordance with the IEC 60758.
| Size range | Qty per cm^3 | |||
| Grade (µm) | 10 to 30 | 30 to 70 | 70 to 100 | >100 |
| Ia | 2 | 1 | 0 | 0 |
| Ib | 3 | 2 | 1 | 1 |
| I | 6 | 4 | 2 | 2 |
| II | 9 | 5 | 4 | 3 |
| III | 12 | 8 | 6 | 4 |
e) Infra-red quality indication: The specification is in accordance with the IEC 60758.
| Grade | Max. α3585 | Estimated Q values (x 10^6) |
| A | 0.015 | 3.8 |
| A | 0.024 | 3 |
| B | 0.05 | 2.4 |
| C | 0.069 | 1.8 |
| D | 0.1 | 1.4 |
f) Etch channel density: The specification is in accordance with the IEC 60758.
| Grade | Max. number per cm^3 |
| 1 | 10 |
| 2 | 30 |
| 3 | 100 |
| 4 | 300 |
| 5 | 600 |
Specification for Lumbered Quartz Crystal
a) Angles:
i. Rotation angle of X-surface around Y-axis: 00°00’±15’
ii. Rotation angle of X-surface around Z-axis: 00°00’±15’
b) Dimensional tolerance:
i. Along X or Z axis:±0.1 mm
ii. Along Y axis:±10 mm
c) Surface roughness: as customized, lapped and polished are both available.
Other Crystal Wafer and Substrate Materials
Request A Quote For Optical Grade Quartz Single Crystal Wafer
Send us your dimensions, orientation, surface finish and quantity. Our engineers reply with a technical proposal and price.
Buyer Questions
What is the material of the Optical Grade Quartz Single Crystal Wafer?
What is the cutting angle of the Optical Grade Quartz Single Crystal Wafer?
What is the diameter of the Optical Grade Quartz Single Crystal Wafer?
What is the diameter tolerance of the Optical Grade Quartz Single Crystal Wafer?
How do I get a quotation for the Optical Grade Quartz Single Crystal Wafer?
Can the Optical Grade Quartz Single Crystal Wafer be made to a custom specification?
Who manufactures the Optical Grade Quartz Single Crystal Wafer?
Tell Us What You Need
Send your specification, quantity and destination port. Our engineers reply with a technical proposal and a confirmed lead time.