Essential details
MOQ:10
Shipping:Air freight, land freight, sea freight
Product Code:CRY-07
Product Introduction
Product name: LSAT (La,Sr)(Al,Ta)O3 Substrate
LSAT is a mixed perovskite oxide: lanthanum, strontium, aluminium and tantalum share one lattice in a way that keeps the structure tetragonal from the melting point down to low temperature. That is what makes it the substrate most often chosen when LaAlO3 or SrTiO3 would work but their twinning or phase transition does not.
Key properties:
There is no twinning and no phase transition anywhere between the melting point and low temperature, so the surface orientation you order is the orientation you get at the deposition temperature. The structure matches the high-temperature superconductor YBCO, with a moderate lattice mismatch about the <001> plane, and the thermal expansion coefficient is low, which lets films be deposited at lower temperature with less stress and better lattice matching. It is a mature twin-free tetragonal perovskite crystal that also matches a range of other oxide materials.
There is no twinning and no phase transition anywhere between the melting point and low temperature, so the surface orientation you order is the orientation you get at the deposition temperature. The structure matches the high-temperature superconductor YBCO, with a moderate lattice mismatch about the <001> plane, and the thermal expansion coefficient is low, which lets films be deposited at lower temperature with less stress and better lattice matching. It is a mature twin-free tetragonal perovskite crystal that also matches a range of other oxide materials.
Typical use:
substrates for YBCO and other high-temperature superconducting films; perovskite and oxide films that need a twin-free surface; devices that would otherwise use LaAlO3 or SrTiO3 but cannot tolerate twinning.
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 <001>, single or double side polished to Ra ≤ 5 Å, orientation deviation ±0.5°, edge positioning 2° or better on request. Sloping wafers are customised to requirement. 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 <001>, single or double side polished to Ra ≤ 5 Å, orientation deviation ±0.5°, edge positioning 2° or better on request. Sloping wafers are customised to requirement. Packed in a Class 100 clean bag inside a Class 1000 clean room.
Ordering:
Minimum order 10 pcs. Send the film material, the required orientation and the size; sloping and off-axis wafers are quoted from the drawing.
Minimum order 10 pcs. Send the film material, the required orientation and the size; sloping and off-axis wafers are quoted from the drawing.
Product Parameter:
Material | LSAT, (La,Sr)(Al,Ta)O3 single crystal
Crystal structure | Tetragonal perovskite
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
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>
Orientation deviation | ±0.5°
Edge positioning accuracy | 2°, or 1° or better on special requirement
Sloping wafer | Customised to requirement
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 perovskite
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
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>
Orientation deviation | ±0.5°
Edge positioning accuracy | 2°, or 1° or better on special requirement
Sloping wafer | Customised to requirement
Surface roughness | Ra ≤ 5 Å over 5×5 µm
Packing | Class 100 clean bag, Class 1000 clean room
Minimum order | 10 pcs
