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Company Profile

Selling Leads

Shanghai LaserMa Crystals Inc.
[China]

Address:
No.518, Shengwang Road, Xinzhuang, Minhang district Shanghai Shanghai China

Phone:
86-21-69982303

Contact name:
Hellen

Shanghai LaserMa Crystals Inc.

Products

	LIALO2

Click to enlarge image

The lattice parameter of Lithium Aluminium Oxide (γ) (LiAlO2) crystal can match with the Gallium Nitride film very well. The mismatch coefficients are 0.2% and 1.4% only for LiAlO2, much smaller than that of the common used substrates such as <0001> sapphire (14%), <100>
MgO (3%), <0001> SiC (3.5%). The Gallium Nitride film is a very
important material for blue, violet, UV and white LED. A substrate material that matches the film to be grown well is very important to get a nice GaN epitaxial film.
1.Crystal Property
Substrate
LiAlO2

Crystal structure
422 tetragonal

Cell parameter
a=5.1687 ? c=6.2676 ?

Melting point（°K）
1973

Density （g/cm3）
2.615

Thermal expansion（x10-6k-1）
αa=7.1

αc=15

(393-973°K)

Hardness（Mohs）
6.5

Growth Method
Czockralski

2. Main Specifications:
Orientation：
＜100＞, ＜110＞,＜111＞

Orientation accuracy:
±0.5°

Edge Orientation accuracy:
2°（or 1°for special order）

Thickness tolerance:
±0.02mm Or ±0.005mm

Cut with special tilt angle：
available(tilt angle:1°-45°)

Standard Size:
Ф20, 20x20,10x10,10x5,10x3mm

Thickness:
0.5mm 1.0mm.

Dimension Tolerance
+/-0.05mm

Faltness:
λ/4@633nm

Micro roughness

（5μm?μm）
Ra:≤5?

Parallelism
< 30 arc Sec.

AR coatinfg
R<0.2% at centret wavlength