LiAlO2 Substrate

LiAlO2 (Lithium Aluminate) crystal is the most important substrate for the high-temperature superconducting thin film. It matches very well with high temperatures superconducting materials such as YBaCuO and has the characteristics of low dielectric constant and low microwave loss. LiAlO2 is a potential substrate for III-V nitride thin films due to its excellent lattice match to GaN, chemical stability at high temperature and cost effective than ZnO. LiAlO2 crystal can replace ZnO and sapphire as optical substrate. Lithium Aluminate (LiAlO2 ) single crystal has a lower lattice mismatch with GaN crystal to be an excellent substrate for GaN film.

OST Photonics offers high quality LiAlO2 substrates for researchers and industries. Crystal orientation, size and thickness can be customized according to your requirements.

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Features

  • Good lattice matching with YBaCuO

  • Low dielectric constant

  • Low microwave loss

Applications

  • Substrate for high-temperature superconducting thin film

  • Substrate for III-V nitride thin films

  • Optical substrate

Processing Capability

  • Orientation:<100>,<001>, etc.

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

  • Thickness: 0.5mm, 1.0mm, etc.

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

Specification and properties of LiAlO2 Substrates

Crystal Structure

Tetragonal

Lattice Constant

a=5.17 Å    c=6.26 Å

Melting Point

1900 ℃

Density

2.62 g/cm3

Hardness

7.5 Mohs

Mismatch Rate with GaN<001>

1.4%

Orientation

<100>,<001>, etc.

Orientation Tolerance

±0.5° or better

Dimension

1”, 2”, 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