Essential details
MOQ:10
Shipping:Air freight, land freight, sea freight
Product Code:CRY-12
Product Introduction
Product name: Strontium Lanthanum Aluminate (SrLaAlO4) Substrate
Strontium lanthanum aluminate is a tetragonal perovskite-related substrate with no twinning and no phase transition between the melting point and low temperature. Its thermal expansion is lower than the other perovskites in this group, which is the reason it is chosen when film stress has to be kept down.
Key properties:
The <001> plane shows a moderate lattice mismatch with YBCO, in the range of 2.5% to 3.5%, which is the working window most films want. Because the thermal expansion coefficient is lower than that of other perovskite crystals, films can be deposited at lower temperature, the lattice mismatch improves as a result and the stress in the film is reduced. There is no twinning or phase transition on cooling, so the surface stays as polished.
The <001> plane shows a moderate lattice mismatch with YBCO, in the range of 2.5% to 3.5%, which is the working window most films want. Because the thermal expansion coefficient is lower than that of other perovskite crystals, films can be deposited at lower temperature, the lattice mismatch improves as a result and the stress in the film is reduced. There is no twinning or phase transition on cooling, so the surface stays as polished.
Typical use:
substrates for YBCO and other high-temperature superconducting films, and for perovskite oxide films where thermal expansion and film stress have to be controlled.
Fabrication and options:
Standard sizes 10×3 to 20×20 mm and Ø15, Ø20, Ø1", Ø2" and Ø2.6", thickness 0.5 mm and 1.0 mm, orientation <001>, single or double side polished to Ra ≤ 5 Å, orientation accuracy ±0.5°, edge orientation 2° or better. Bevelled 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, Ø20, Ø1", Ø2" and Ø2.6", thickness 0.5 mm and 1.0 mm, orientation <001>, single or double side polished to Ra ≤ 5 Å, orientation accuracy ±0.5°, edge orientation 2° or better. Bevelled 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 film material, the orientation and the size; bevelled wafers are quoted from the drawing.
Minimum order 10 pcs. Send the film material, the orientation and the size; bevelled wafers are quoted from the drawing.
Product Parameter：
Material | Strontium lanthanum aluminate, SrLaAlO4 single crystal
Crystal structure | Tetragonal
Growth method | Czochralski
Lattice constant | a = 3.756 Å, c = 12.63 Å
Melting point | 1650 °C
Density | 5.92 g/cm3
Mohs hardness | 6-6.5
Dielectric constant | 16.8
Misfit with YBCO | 2.5%-3.5% about the <001> plane
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 | <001>
Crystal plane orientation accuracy | ±0.5°; edge orientation 2°, or 1° on special requirement
Bevelled 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
Growth method | Czochralski
Lattice constant | a = 3.756 Å, c = 12.63 Å
Melting point | 1650 °C
Density | 5.92 g/cm3
Mohs hardness | 6-6.5
Dielectric constant | 16.8
Misfit with YBCO | 2.5%-3.5% about the <001> plane
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 | <001>
Crystal plane orientation accuracy | ±0.5°; edge orientation 2°, or 1° on special requirement
Bevelled 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
