VY Optics Photoelectric Technology Co., Ltd.

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    Saw Grade LN Wafer

    Typical Specifications of Saw Grade LN Wafer 


    Cutting AngleDeg.  X/Y/Z/Y36/Y42/Y48/X112 etc
    Diameter/sizemm

    3”/76.2

    4”/100
    Tol(±)mm0.250.5
    Thicknessmm0.10mm or more0.18mm or more
    Primary reference flatmm22mm or customized22mm or customized
    LTV (5mmx5mm)µm< 2< 2

    TTV

    µm< 8< 10
    Bowµm

    ±20   

    ±25

    Warp

    µm≤ 30≤ 40
    PLTV%

    ≥95%(5mm*5mm)

    ≥95%(5mm*5mm)

    Orientation Flat


    All available

    Surface Type


    Single Side Polished /Double Sides Polished

    Polished side Ra

    nm≤1

    Back Side Criteria

    µmGeneral is 0.2-0.5 or as customized

    Edge Rounding

    mmCompliant with SEMI M1.2 Standard/refer to IEC62276

    Customization acceptable


    Basic materials characteristics


    Crystal symmetry

    Trigonal, 3m

    Lattice   constant, A

    a =5.154   c = 13.783

    Density, g/cm3

    7.45

    Melting point  °C 

    1650

    Curie point , °C

    605

    Mohs hardness

    6

    Thermal expansion coefficient, 10-6/ °C

    a= 16   a= 4

    Thermal conductivity , mW/cm °C

    46

    Dielectric Constant (@ 100 KHz)  

    ea = 54    ec = 43

    Refractive indices @ 633 nm

    no = 2.175   ne = 2.180

    Pyroelectric Coefficient

    -2.3 10-4 C/°C/m2


    The possible applications

    1.        Lithium niobate is used extensively in the telecoms market.
    a)        In mobile telephones and optical modulators,it is the material of choice for the manufacture of surface acoustic wave devices. 
    b)        In laser frequency doubling, nonlinear optics, Pockels cells, optical parametric oscillators, Q-switching devices for lasers, other acousto-optic devices, optical switches for gigahertz frequencies
    c)        It is an excellent material for manufacture of optical waveguides.

    2.        It's also used in the making of optical spatial low-pass (anti-aliasing) filters.