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EAGLE XG®

Alkali-free alkaline earth boro-alumino-silicate glass

Special Properties

  • Very low micro-roughness
  • Almost the same expansion coefficient as silicon
  • High strain point for increased processing temperatures
  • Contains no heavy metals
  • Very good surface quality
  • High dimensional stability
  • Excellent clarity
  • Increased chemical durability
  • Low specific weight
  • Interesting electrical properties
  • Can be processed by cutting, grinding, and polishing

Typical Applications

  • Modern LCD technology
  • Glass wafers for the semiconductor industry
  • Thin glass windows
  • High-resolution displays
  • Electronic packaging

Related glass types

  • EAGLE2000
    Alkali-free boro-aluminosilicate glass from CORNING®
  • 1737F
    Alkali-free aluminosilicate glass from CORNING®
  • AS 87 eco
    Ultra-thin aluminosilicate glass from SCHOTT
  • AF 32® eco
    Alkali-free alumina-borosilicate thin glass from SCHOTT

 

Request for Quotation

48h-Express Service Available in 48 h Express-Service

EAGLE XG® is an alkali-free* alkaline earth boro-alumino-silicate glass made by CORNING®. It is a perfect material for the fabrication of wafer-level optics. The high-quality glass is manufactured by a unique fusion draw process resulting in excellent flatness, smoothness, surface quality, and low nominal thickness tolerance. EAGLE XG® is considered eco-friendly as the glass contains no heavy metals like arsenic, barium, or antimony.

EAGLE XG® glass offers excellent dimensional stability, high chemical durability, and outstanding clarity. It provides all features required for modern LCD-Displays. The thermal coefficient of expansion (CTE) of EAGLE XG® glass closely aligns with silicon, enabling many advanced applications in semiconductor technology. Furthermore, the glass has been optimized for an increased strain point, allowing improved fabrication processes at higher temperatures.

Also, EAGLE XG® is an exciting material for scientific applications. Especially the very low micro-roughness of the glass surfaces allows special research projects impossible with most other glass materials.

To request a quote for custom-sized EAGLE XG® substrates or windows, please use the button below, or select a thickness from the table.

 

Request for Quotation

 

*The total alkali content is approximately 0,1 weight %.
(Typical < 0,05 weigth%)

 

Specifications


Transmission at 0,7 mm thickness EAGLE XG® transmission at 0,7 mm thickness
Click to view the enlarged curve for more details


Standard Glass Thicknesses

(Please click on glass thickness to request a quote)

Thickness (mm)

Tolerance

 48h-Express Service
0,30 ±0,02 ✔
0,70 ±0,02 ✔
1,10 ±0,02 ✔
The thicknesses marked with "✔" are also available within 48–h Express Service.
Additional glass thicknesses (0,2 mm, 0,21 mm, 0,25 mm, 0,4 mm, and 0,5 mm) are available on request if sufficient quantities are purchased. Please send us your inquiry in case of need.

Optical Specifications

  • Abbe constant: 62,7
  • Birefringence constant: 331 (nm/cm)/(kg/mm2)

Refractive index numbers

Designation

Wavelength (nm)

Refractive Index
nF'
480
1,5159
nF
486,1
1,5154
ne
546,1
1,5119
nd
587,6
1,5099
nD
589,3
1,5097
632,8
1,5082
nC'
643,8
1,5077
nC
656,3
1,5073
850
1,5028
940
1,5013
 
980
1,5007
1000
1,5004

Mechanical Specifications

  • Density: 2,38 g/cm3
  • Young's modulus: 73,6 GPa
  • Poisson's ratio: 0,23
  • Shear modulus: 30,1 GPa
  • Vickers hardness (200 g load): 640 kgf/mm2
  • Fracture toughness 0,89 MPa × m0,5

Thermal Properties

  • Coefficient of expansion (CTE) as-formed (ppm/°C):
    • 3,4 (0 – 300 °C)
    • 3,4 (20 – 260 °C)
  • Viscosities:
    • Softening Point (107,6 dPa): 971 °C
    • Annealing Point (1013 dPa): 722 °C
    • Strain Point (1014,5 dPa): 669 °C

Thermal Conductivity

(specific heat × therm. diffusivity × glass density)
Temperature
(°C)
Specific heat
(J/kg×K)
Diffusivity
(cm2/sec)
Conductivity
(W/m×K)
25
768
0,0060
1,10
100
896
0,0057
1,22
200
998
0,0055
1,30
300
1067
0,0053
1,35
400
1110
0,0052
1,38
500
1154
0,0052
1,42

 

Chemical Capabilities

  • Weathering: Class 1
    Weathering is defined by atmospheric-borne gases and vapor such as water and carbon dioxide. A glass rated 1 will almost never show weathering effects. Those rated 2 will occasionally be troublesome, particularly if weathering products cannot be removed. Glass types rated 3 require most careful consideration.

Chemical Durability

Solution

Reaction time/
Temperature

Weight loss
(mg/cm2)
HCl – 5 %
24 h at 95 °C
0,79
HNO3 – 1M
24 h at 95 °C
0,49
HF – 10 %
20 min. at 20 °C
5,18
NH4F:HF – 10 %
20 min. at 20 °C
0,84
1HF:10HNO3
3 min. at 20 °C
1,48
1HF:100HNO3
3 min. at 20 °C
0,16
DI H2O
24 h at 95 °C
0,00
Na2CO3 - 0,02N
6 h at 95 °C
0,16
NaOH - 5 %
6 h at 95 °C
1,83

 

Electrical Properties

Dielectric Constant & Dissipation Factor
Frequency
(GHz)
Dielectric
Constant
Loss
Tangent
0,1
5,28
0,002
1
5,30
0,002
2,5
5,18
0,004
10
5,14
0,008
15
5,14
0,008
24
5,14
0,009
60
5,11
0,011
70
5,11
0,013

Volume Resistivity (25 – 500°C)
Temperature
(°C)
Log10 Volume Resistivity
(Ω-cm)
25
22,92
250
12,98
350
10,87
500
8,72

Other Specifications (0,5 mm thickness)

  • Dielectric strength: 217 kV/mm
  • Breakdown voltage: 107 kV

EAGLE is an acronym for "Enhanced Attribute Glass for Large-Area Electronics". The XG in the product name stands for "extra green".

 

Other CORNING® materials in our extensive delivery program are EAGLE2000, 1737F, 7059, PYREX®, MACOR®, and ULE®. For further technical details, please feel free to send an information inquiry.


All given details and specifications are mean reference values and are not guaranteed. Also, please consider our "Notes on technical specifications".

© 1994 – 2023 Präzisions Glas & Optik GmbH

Last update 31.05.2023