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Jiaxing AOSITE Photonics Technology Co.,Ltd.
optical grade quartz wafers
optical grade quartz wafers
optical grade quartz crystal wafers
optical grade quartz

Optical Grade Quartz Single Crystal Wafers

OST Photonics offer a variety of sizes and thicknesses of SAW grade Quartz single crystal wafers, with wafer diameters ranging from 1 inch to 4 inch, the thickness can be customized according to your requirements (generally above 0.05 mm). The orientations can be X/Y/Z-cut etc. In addition, high quality quartz blanks (including left handed quartz) are also available.


Application of Optical Grade Quartz Single Crystal Wafers


  • Optical low-pass filters for digital cameras

  • Polarizers and polarifiers in optical instruments

  • Optical isolator and optical fiber coupler in optical fiber communication

  • Semiconductor and microelectronics


Advantages of Optical Grade Quartz Single Crystal Wafers


  • Wide light transmission range

  • Good optical uniformity

  • Corrosion resistance

  • Superior light transmission

  • Super high insulation

  • High-temperature resistance


Ability of Optical Grade Quartz Single Crystal Wafers


  • Orientations: X/Y/Z-cut etc.

  • Diameter: 1”, 2”, 3”, 4”

  • Thickness: 0.2 mm, 0.5 mm, 1.0 mm etc.

  • Available items: crystal wafers, blanks and customized optics


Product Parameters of Optical Grade Quartz Single Crystal Wafers


Material

Quartz Crystal

Cutting Angle

X/Y/Z-cut etc

Diameter

1”(25.4mm)~4”(100mm)

Diameter Tolerance(±)

≤0.20 mm

Thickness

0.05mm or more

LTV (5mmx5mm)

<1µm

TTV

<3µm

Bow

-30<bow<30

Warp

<40µm

Surface Type

Single side polished(SSP)/double sides polished(DSP)

Polished side Ra

<0.5nm

Back Side Criteria

General is 0.2-0.5µm or as customized

Scratch/Dig

Bette than 40/20

Edge Criteria

Compliant with SEMI M1.2 Standard/refer to IEC62276

Material Property

ECD

Better than grade 4

Inclusion

Better than grade I

Q-Value

Better than grade C

Wafer Surface Criteria

Particles φ>0.3 µm

<= 30

Scratch , Chipping

None

Defect

No edge cracks, scratches, saw marks, stains

Packaging

Qty/Wafer box

25pcs per box


Product Parameters of Optical Grade Quartz Single Crystal Blanks


Material

Grade

Dimension

Inclusion

Q-value

Optical homogeneity

Quartz

Optical

Z: 135mm

X: 150mm

Y: 240-280mm

IEC Class I

>2.40 million

1*10^-5

Quartz

Laser

Z<40mm

X<110mm

Y< 200mm

Better than IEC Claas IA

>2.40 million

5*10^-6


Properties of Optical Grade Quartz Single Crystal Wafers


Density, g/cm3

2.65

Melting point, °C

1467

Thermal conductivity, W/(m x K) (T = 25°C)

10.7 (parallel to axis Z)      6.2 (perpendicular to axis Z)

Thermal coefficient of linear expansion at temperature range 0-25°Ñ, °C-1

7.1 õ 10-6 (parallel to axis Z)

13.2 õ 10-6 (perpendicular to axis Z)

Hardness (Mohs)

7

Specific heat capacity, J/(kg x K) (T = 25°C)

710

Dielectric constant at 30 MHz

4.34 (parallel to axis Z)      4.27 (perpendicular to axis Z)

Young's modulus (E), GPa

97.2 (parallel to axis Z)      76.5 (perpendicular to axis Z)

Shear modulus (G), GPa

31.14

Bulk modulus (K), GPa

36.4

Chemical stability

insoluble in water

Elastic coefficients

C11=87 C12=7 C44=58 C13=13 C14=18 C33=106


Synthetic Crystal Quartz Refractive Index VS Wavelength


l, mm

n0

ne

l, mm

n0

ne

l, mm

n0

ne

0.185

1.676

1.69

0.243

1.605

1.617

0.589

1.544

1.553

0.194

1.66

1.673

0.263

1.593

1.604

1.083

1.534

1.543

0.204

1.643

1.656

0.291

1.581

1.591

1.8

1.524

1.532

0.219

1.625

1.637

0.34

1.567

1.577

2.5

1.512

1.52

0.231

1.614

1.626

0.405

1.557

1.567

3

1.5

1.507


Quality Evaluation of Synthetic Quartz Crystal


a) The amount of crystal defect and impurity in synthetic quartz crystal depends on growth rate, mineralizer and raw material. The growth rate affects greatly to the important properties such as infra-red absorption coefficient α, which correlates to Q value, and frequency –temperature characteristics. The larger growth rate causes increase in α, decrease in Q value, and dispersion in frequency-temperature characteristics.


b) The quality index of synthetic quartz crystal was originally a Q value, and a 5 MHz quartz crystal unit operated in 5th overtone mode was used to obtain the Q value. But it required laborious work to fabricate the 5 MHz crystal unit, so the index had been changed to the coefficient α instead of the Q value.


Standard Specification for Synthetic Quartz Crystal


a) Twinning: There shall be no electrical or optical twinning in the usable region.


b) Strain: There shall be no strain contained both inside and surface of seed crystal as well as in a grown quartz crystal.


c) Cracks and fractures: There shall be no cracks, chippings or fractures in the usable region.


d) Inclusion density: The specification is in accordance with the IEC 60758.


Size range

Qty per cm3

Grade (µm)

10 to 30

30 to 70

70 to 100

>100

Ia

2

1

0

0

Ib

3

2

1

1

I

6

4

2

2

II

9

5

4

3

III

12

8

6

4


e) Infra-red quality indication: The specification is in accordance with the IEC 60758.


Grade

Max. α3585

Estimated Q values (x 106)

A

0.015

3.8

A

0.024

3

B

0.05

2.4

C

0.069

1.8

D

0.1

1.4


f) Etch channel density: The specification is in accordance with the IEC 60758.


Grade

Max. number per cm3

1

10

2

30

3

100

4

300

5

600


Specification for Lumbered Quartz Crystal


a) Angles:


i. Rotation angle of X-surface around Y-axis: 00°00’±15’


ii. Rotation angle of X-surface around Z-axis: 00°00’±15’


b) Dimensional tolerance:


i. Along X or Z axis:±0.1 mm


ii. Along Y axis:±10 mm


c) Surface roughness: as customized, lapped and polished are both available.

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Related SAW & Optical Grade Quartz Single Crystal Wafers
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Head Office: No. 66, 8 Group, Chengbei Village, Yanguan Town, Jiaxing 314411, China;

Hangzhou Branch: Room 1012, Chunhua Bussiness Center, No. 159, Hangbo Street, Shangcheng District, Hangzhou 310009, Zhejiang, China
Head Office: No. 66, 8 Group, Chengbei Village, Yanguan Town, Jiaxing 314411, China;

Hangzhou Branch: Room 1012, Chunhua Bussiness Center, No. 159, Hangbo Street, Shangcheng District, Hangzhou 310009, Zhejiang, China
sales@ostphotonics.com; info@ostphotonics.com +86-0571-86780460