LaAlO3 substrate

LaAlO3 Substrate

Lanthanum aluminate (LaAlO3) single crystal is currently the most important industrialized, large-size single crystal material for high-temperature superconducting thin film substrates. It is grown by the Czochralski method, and single crystals and substrates with a diameter of 2 inches and larger can be obtained. It matches well with high-temperature superconducting materials and lattices such as YBaCuO, has low dielectric constant and low microwave loss, so it is suitable for making high-temperature superconducting microwave electronic devices (such as high-temperature superconducting microwave filters in telecommunication). There are huge reality and potential application prospects.

OST Photonics offers high quality LaAlO3 substrates for researchers and industries. Crystal orientation, size and thickness can be customized according to your requirements.

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Features

Good lattice match to most materials with Perovskite structure

Low dielectric constant

Low microwave loss

Applications

  • High-temperature superconducting microwave filters in telecommunication

  • Advantages

  • Good lattice matching with YBaCuO

  • Low dielectric constant

  • Low microwave loss

Processing Capability

  • Orientation:<100>,<110>,<111>, etc.

  • Dimension: 1”, 2”, 2.6”, 10x5mm, 10x10mm, 15x15mm, 20x15mm, 20x20mm, etc.

  • Thickness: 0.5mm, 1.0mm, etc.

  • Available items: wafers, substrates, blanks and customized optics

Specification and Properties of LaAlO3 Substrate

Crystal Structure

M6 (normal temperature)

M3 (>435℃)

Lattice Constant

M6 a=5.357A  c=13.22 Å

M3 a=3.821 Å

Melting Point

2080 ℃

Density

6.52 g/cm3

Hardness

6-6.5 Mohs

Thermal Expansion Coefficient

9.4×10-6 /℃

Dielectric Constants

ε=21

Secant Loss (10ghz)

~3×10-4@300K, ~0.6×10-4@77K

Color and appearance

Tan to Brown based on annealing condition
Visible twins on the polished substrate

Chemical Stability

Insoluble in mineral acids at 25 ℃ and soluble in H3PO3 at >150 ℃

Growth Method

Czochralski

Orientation

<100>,<110>,<111>, etc.

Orientation Tolerance

±0.5° or better

Dimension

1”, 2”, 2.6”, 10x5mm, 10x10mm, 15x15mm, 20x15mm, 20x20mm, etc.

Dimension Tolerance

±0.1 mm or better

Thickness

0.5mm, 1.0mm, etc.

Thickness Tolerance

±0.05 mm or better

Surface Finish

Single-side polished (SSP)/Double sides polished (DSP)

Roughness

Ra≤5Å

Package

Class 100 clean bag, Class 1000 super clean room