Essential details
MOQ:10
Shipping:Air freight, Land transport, Sea freight
Product Code:CRY-04
Product Introduction
Product name: Lithium Aluminate (LiAlO2) Substrate
Lithium aluminate is a tetragonal oxide substrate with an unusual property for this price bracket: its lattice mismatch to GaN is small, about 1.4% along the c axis, which makes it a candidate for growing III-nitride films without the defect density that comes with sapphire.
Key properties:
The lattice match to YBaCuO and other high-temperature superconductors is good, with a low dielectric constant and low microwave loss. Against GaN the mismatch is small and the crystal is chemically stable at the temperatures used for growth, which is what makes it a III-V nitride substrate. Compared with ZnO and sapphire it is also a cost-effective optical substrate. The material belongs to the tetragonal system, space group P41212, with oxygen ions in a hexagonal close packing, lithium in tetrahedral and aluminium in octahedral sites.
The lattice match to YBaCuO and other high-temperature superconductors is good, with a low dielectric constant and low microwave loss. Against GaN the mismatch is small and the crystal is chemically stable at the temperatures used for growth, which is what makes it a III-V nitride substrate. Compared with ZnO and sapphire it is also a cost-effective optical substrate. The material belongs to the tetragonal system, space group P41212, with oxygen ions in a hexagonal close packing, lithium in tetrahedral and aluminium in octahedral sites.
Reported results:
published work around 2020 reports GaN devices on LiAlO2 reaching an output power density of 8.5 W/mm at 40 GHz, and epitaxial layers with a lower defect density than on sapphire. These are figures from the literature, not from our own device measurements.
Typical use:
epitaxial growth of III-V nitride semiconductors, GaN-based high electron mobility transistors, blue LED devices, microwave RF power devices and deep ultraviolet optoelectronic devices.
Fabrication and options:
Standard sizes 10×3 to 20×20 mm and Ø15 to Ø2.6", thickness 0.5 mm and 1.0 mm, orientation <100> or <001>, single or double side polished to Ra ≤ 5 Å, orientation accuracy ±0.5°. Slanted wafers with 1° to 45° inclination on request. Packed in a Class 100 clean bag inside a Class 1000 clean room.
Standard sizes 10×3 to 20×20 mm and Ø15 to Ø2.6", thickness 0.5 mm and 1.0 mm, orientation <100> or <001>, single or double side polished to Ra ≤ 5 Å, orientation accuracy ±0.5°. Slanted wafers with 1° to 45° inclination on request. Packed in a Class 100 clean bag inside a Class 1000 clean room.
Ordering:
Minimum order 10 pcs. Send the orientation, size and thickness; slanted wafers are quoted from the drawing.
Minimum order 10 pcs. Send the orientation, size and thickness; slanted wafers are quoted from the drawing.
Product Parameter：
Material | Lithium aluminate, LiAlO2 single crystal
Crystal structure | Tetragonal, space group P41212
Lattice constant | a = 5.17 Å, c = 6.26 Å
Melting point | 1900 °C
Density | 2.62 g/cm3
Mohs hardness | 7.5
Misfit with GaN | 1.4% along <001>
Size | 10×3, 10×5, 10×10, 15×15, 20×15, 20×20 mm; Ø15, Ø20, Ø1", Ø2", Ø2.6"
Thickness | 0.5 mm, 1.0 mm
Polishing | Single side or double side
Orientation | <100>, <001>
Orientation accuracy | ±0.5°; edge orientation 2°, or 1° on special requirement
Slanted wafer | 1° to 45° inclination on request
Surface roughness | Ra ≤ 5 Å over 5×5 µm
Packing | Class 100 clean bag, Class 1000 clean room
Minimum order | 10 pcs
Crystal structure | Tetragonal, space group P41212
Lattice constant | a = 5.17 Å, c = 6.26 Å
Melting point | 1900 °C
Density | 2.62 g/cm3
Mohs hardness | 7.5
Misfit with GaN | 1.4% along <001>
Size | 10×3, 10×5, 10×10, 15×15, 20×15, 20×20 mm; Ø15, Ø20, Ø1", Ø2", Ø2.6"
Thickness | 0.5 mm, 1.0 mm
Polishing | Single side or double side
Orientation | <100>, <001>
Orientation accuracy | ±0.5°; edge orientation 2°, or 1° on special requirement
Slanted wafer | 1° to 45° inclination on request
Surface roughness | Ra ≤ 5 Å over 5×5 µm
Packing | Class 100 clean bag, Class 1000 clean room
Minimum order | 10 pcs
