(La,Sr)(Al,Ta)O3

The strontium lanthanum aluminate crystal has no twins and phase transitions from the melting point to the low temperature. It has the same structure as the high-temperature superconductor YBCO. Compared with other substrates, the<001>plane has a moderate lattice mismatch with YBCO<001>. (2.5~3.5%). At the same time, the thermal expansion coefficient of this crystal is lower than that of other perovskite crystals, which can deposit films at lower temperatures to improve lattice mismatch and reduce stress.

Uses/Applications

Suitable for deposit films at low temperatures to improve lattice mismatch and reduce stress.

Features/Benefits

No twins and phase transitions from the melting point to the low temperature. Has the same structure as the high-temperature superconductor YBCO.
Moderate lattice mismatch with YBCO<001>. (2.5~3.5%).
Thermal expansion coefficient of this crystal is low.

  • Crystal structure

    Quartet

    Crystal growth method

    Czochralski technology

    Lattice constant

    a=3.756Å   c=12.63 Å

    Melting point

    1650

    Density

    5.92g/cm3

    Hardness

    6-6.5mohs

    dielectric coefficient

    ε=16.8

    Size

     

    10x310x510x1015x15,,20x1520x20

    Ф15,Ф20Ф1″Ф2″,Ф2.6″

    Thickness

    0.5mm1.0mm

    Polishing

    Single-sided or double-sided

    Crystal orientation

    001  

    Crystal plane orientation accuracy

    ±0.5°

    Edge orientation accuracy

    Special requirements can reach within 1°

    Bevel wafer

    According to specific requirements, wafers with edge-oriented crystal planes inclined at a specific angle (inclination angle 1°-45°) can be processed

    Ra:

    ≤5Å5µm×5µm



    Package

    Class 100 clean bag, Class 1000 super clean room



  • Dimension

    10x3mm,10x5mm,10x10mm,15x15mm,20x15mm,20x20mm

    Ф15,Ф20,Ф1″,Ф2″,Ф2.6″


    Thickness

    0.5mm,1.0mm