Hangzhou Freqcontrol Electronic Technology Ltd.

Optical Grade Lithium Tantalate Wafers
Our abundance experience at growing and mass production for Optical grade Lithium Tantalate. We are equipped with advanced facilities at Crystal growing, wafer lapping, polishing and checking, all finished products are passed at Testing of curie Temp and QC inspection.
 We supply lithium tantanlate wafer, which include fe doped lt wafers, saw grade lithium tantalate wafers and optical grade lithium tantalate wafers.
Our R&D is active at developing and researching from new material to finished products at all kinds of optical dopped wafers & electronic components.
Product Parameters

Material LiTaO3 wafers（White or Black）
Curie Temp 603±2℃
Cutting Angle X/Y/Z etc
Diameter/size 2”/3”/4” LT wafer
Tol(±) <0.20 mm
Thickness 0.18 ~ 0.5mm or more
Primary Flat 16mm/22mm /32mm
TTV  <3µm
Warp <40µm
Surface Type Single Side Polished /Double Sides Polished
Polished side Ra <0.5nm
Back Side Criteria General is 0.2-0.5µm or as customized
Edge Criteria R=0.2mm or Bullnose
Optical doped Zn/MgO etc
Wafer Surface Criteria Contamination, None
Particles ￠>0.3 µ  m <= 30
Scratch , Chipping None
Defect No edge cracks, scratches, saw marks, stains
Packaging Qty/Wafer box 25pcs per box 
CQT dedicated to produce series glass wafers, fused silica wafers, SAW grade lithium tantalate wafers, optical grade lithium tantalate wafers, SAW grade lithium niobate wafers, optical grade lithium niobate wafers. CQT is a leading Chinese manufacturer who involves in piezoelectric crystals, surface acoustic wave filters and the single crystal growth.

for Optical grade application 
1. Low pass filters of Digital Camera in high end models/ holographic components for DVD pick up
2. Optical communications; optical switches and modulators/ Gyro sensors
3. Laser wavelength converter, generating Blue and Green lasers/By using SHG techniques (Displays, medical, and environmental purposes)