SAW grade LN wafer
|
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 |
aa = 16 ac = 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 |
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.
|
Cutting Angle |
Deg. |
X/Y/Z/Y36/Y42/Y48/X112 etc |
|
|
Diameter/size |
mm |
3 "/76.2 |
4 "/100 |
|
Tol(±) |
mm |
0.25 |
0.5 |
|
Thickness |
mm |
0.10mm or more |
0.18mm or more |
|
Primary reference flat |
mm |
22mm or customized |
32.5mm or customized |
|
LTV (5mmx5mm) |
µm |
< 2 |
< 2 |
|
TTV |
µm |
< 8 |
< 10 |
|
Bow |
µm |
± 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 |
µm |
General is 0.2-0.5 or as customized |
|
|
Edge Rounding |
mm |
Compliant with SEMI M1.2 Standard/refer to IEC62276 |
|
Customization acceptable
Typical Specifications
Lithium Niobate LiNbO3 crystal wafer
