customized size diameter φ350mm dia300mm A-axis C-axis round shape double side poilished Al2O3 sapphire optical glass lens window
1. what is sapphire ?
Sapphire is a material of a unique combination of physical, chemical and optical properties,
which make it resistant to high temperature, thermal shock, water and sand erosion, and scratching.
It is a superior window material for many IR applications from 3µm to 5µm.
C-plane sapphire substrates are widely used to grow III-V and II-VI compounds such as GaN for
blue LED and laser diodes, while R-plane sapphire substrates are used for the hetero-epitaxial
deposition of silicon for microelectronic IC applications.
2. specification for optical lens
Diameter 0.2-350mm or customization for round
Diameter tolerance +/-0.1mm or +/-0.02mm
Thickness tolerance ± 0.1mm or +/-0.02mm
Surface quality (scratch & dig) 60/40, 40/20 or better
Surface accuracy λ/10, λ/2, λ
Clear Aperture >85%, >90%
Parallelism +/-3' ,+/-30''
Bevel 0.1~0.3mm×45 degree
coating AR, BBAR or upon customer request( UV, VIS, IR)
specification for led
|Orientation||R-plane, C-plane, A-plane, M-plane or a specified orientation|
|Orientation Tolerance||± 0.1°|
|Diameter||2 inches, 3 inches, 4 inches, 5inch,6 inches, 8 inches or others|
|Diameter Tolerance||0.1mm for 2 inches, 0.2mm for 3 inches, 0.3mm for 4 inches, 0.5mm for 6 inches|
|Thickness||0.08mm,0.1mm,0.175mm,0.25mm, 0.33mm, 0.43mm, 0.65mm, 1mm or others;|
|Primary Flat Length||16.0±1.0mm for 2 inches, 22.0±1.0mm for 3 inches, 30.0±1.5mm for 4 inches, 47.5/50.0±2.0mm for 6 inches|
|Primary Flat Orientation||A-plane (1 1-2 0 ) ± 0.2°; C-plane (0 0-0 1 ) ± 0.2°, Projected C-Axis 45 +/- 2°|
|TTV||≤7µm for 2 inches, ≤10µm for 3 inches, ≤15µm for 4 inches, ≤25µm for 6 inches|
|BOW||≤7µm for 2 inches, ≤10µm for 3 inches, ≤15µm for 4 inches, ≤25µm for 6 inches|
|Front Surface||Epi-Polished (Ra< 0.3nm for C-plane, 0.5nm for other orientations)|
|Back Surface||Fine ground (Ra=0.6μm~1.4μm) or Epi-polished|
|Packaging||Packaged in a class 100 clean room environment|
--For LED substrate application
--Sapphire wafer and substrate applications include:
--Microelectronic IC applications - SOS Silicon-on-Sapphire
--Growth of superconducting compounds / Gallium Nitride - Infrared detectors
-- Hybrid microelectronics - Polishing carriers
--Optical transmission from ultraviolet to near infrared
4 Our products
1. Q: Are you a factory or trading company?
A: ZMKJ is trading company but we have a sapphire factory for wafer process in wuxi city
2. Q: Where is your factory located?
A: Our factory located in wuxi city of jiangsu province nearby shanghai city about 1hour driving distance.
3. Q: What's your MOQ?
A: MOQ is 3 pcs
4. Q: Can you accept customization?
A: Yes, of course
5. Q: If I place an order now, how long would it be before I got delivery?
A: It would largely depend on the size of the order and the items you want.
6. Q: What’s the quality assurance we provided and how do we control quality?
A: Established a procedure to check products at all stages of the manufacturing process -
raw materials, in process materials, validated or tested materials, finished goods, etc.
Besides, we have also developed a procedure which identifies the inspection and test
status of all items at all stages of the manufacturing process.