Langasite (LGS) Crystals and Wafers
High Electromechanical Coupling Factor: LGS crystal has an electromechanical coupling factor of 15.8%, higher than that of quartz crystal. This indicates its high efficiency in converting electrical energy into mechanical energy.
Lower Propagation Velocities: The surface acoustic wave propagation velocity in LGS crystal is much lower compared to other materials. This allows for smaller geometrical dimensions of filters operating at the same center frequency, which aligns with the trend towards denser integration of modern electronics and reduces production costs.
High Thermal Stability: Devices made from langasite crystal can operate at high temperatures up to 900°C, making them suitable for high-temperature applications.
Applications: Surface Acoustic Wave (SAW) Devices, Bulk Acoustic Wave (BAW) Devices, High-Temperature Applications, etc.
Langasite crystal, also known as Lanthanum gallium silicate, belongs to the space group P321 and point group 32. It is a novel piezoelectric material with significant potential for the fabrication of Surface Acoustic Wave (SAW) and Bulk Acoustic Wave (BAW) devices.
Specifications：
| X Direction | 5~40mm |
| Y Direction | 5~40mm |
| Z Direction | ~80mm |
| Direction Precision | ±20’ |
| Diameter | 5~14mm |
| Frequency | 2.7~21MHz |
| Surface Roughness(Lapped) | Ra=0.3~0.5μm |
| Diameter | 6~76.2mm |
| Thickness | 0.13~0.5mm |
| Reference Flat | 2~15mm |
| Surface Roughness (CMP single or double sides) | Ra≤1nm |
Advantages:
- High Electromechanical Coupling Factor: LGS crystal has an electromechanical coupling factor of 15.8%, higher than that of quartz crystal. This indicates its high efficiency in converting electrical energy into mechanical energy.
- Lower Propagation Velocities: The surface acoustic wave propagation velocity in LGS crystal is much lower compared to other materials. This allows for smaller geometrical dimensions of filters operating at the same center frequency, which aligns with the trend towards denser integration of modern electronics and reduces production costs.
- High Thermal Stability: Devices made from langasite crystal can operate at high temperatures up to 900°C, making them suitable for high-temperature applications.
Applications:
- Surface Acoustic Wave (SAW) Devices: Used in filters, resonators, and sensors.
- Bulk Acoustic Wave (BAW) Devices: Employed in high-frequency applications such as oscillators and filters.
- High-Temperature Applications: Suitable for environments that require operation at elevated temperatures.
Kingwin Optics ensures the highest standards in crystal growth, wafer cutting, lapping, polishing, and quality checking to deliver products that meet the stringent requirements of industrial and research applications.
