EAGLE XG^®

Special Properties

• Alkali-free glass composition*
• Low micro-roughness
• Similar expansion coefficient to silicon
• A high strain point allows for increased process temperatures
• Contains no heavy metals
• Display-grade surface quality
• High dimensional stability
• Excellent clarity
• Increased chemical durability
• Low specific weight
• Outstanding electrical properties
• Can be processed by cutting, grinding, and polishing

Typical Applications

• Wafer-level optics
• Modern LCD technology
• Glass wafers for the semiconductor industry
• Thin glass windows
• High-resolution displays
• Electronic packaging
• Substrate for optical coatings

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

48-hour express service

EAGLE XG^® is an alkali-free alkaline earth boro-aluminosilicate glass made by CORNING^®. It is a perfect material for the fabrication of wafer-level optics. The high-quality glass is produced by a unique fusion draw process, resulting in excellent flatness, smoothness, surface quality, and low nominal thickness tolerance. Due to its high material quality, EAGLE XG^® is also ideal for the manufacturing of glass wafers and as a substrate for optical coatings.

EAGLE XG^® glass offers exceptional dimensional stability, high chemical durability, and outstanding clarity. It provides all the features required for modern LCDs and other advanced display technology. The thermal coefficient of expansion (CTE) of EAGLE XG^® glass closely aligns with silicon, enabling a wide range of sophisticated semiconductor applications. Moreover, glass has been optimized for an increased strain point, allowing improved fabrication processes at higher temperatures.

EAGLE XG^® is also an exciting material for scientific applications. The very low micro-roughness of the glass surfaces allows for special research projects that are impossible with most other glass materials.

EAGLE XG^® is considered environmentally friendly because the glass does not contain heavy metals such as arsenic, barium or antimony.

 

To request a quote for custom-sized EAGLE XG^® substrates or windows, please click 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 weight-%)

 

Specifications

EAGLE XG^® transmission at 0,7 mm
glass thickness



Enlarge the curve fto view more details

Additional Transmission Curves

0,30 mm glass thickness:

• 200–700 nm
• 700–1400 nm

0,70 mm glass thickness:

• 200–700 nm
• 700–1400 nm

1,10 mm glass thickness:

• 200–700 nm
• 700–1400 nm

 

EAGLE XG^® standard glass thicknesses

Please click on glass thickness to start a request:

Thickness (mm)	Tolerance
0,30	±0,02	✔
0,70	±0,02	✔
1,10	±0,02	✔
The thicknesses marked with "✔" are also available within our 48-hour express service.
More 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 × m^0,5

Thermal Properties

• Coefficient of expansion (CTE) as-formed (ppm/°C):
  • 3,4 (0–300 °C)
  • 3,4 (20–260 °C)
• Viscosities:
  • Softening Point (10^7,6 dPa): 971 °C
  • Annealing Point (10¹³ dPa): 722 °C
  • Strain Point (10^14,5 dPa): 669 °C

Thermal Conductivity (specific heat × thermal 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 vapors such as water and carbon dioxide. A glass rated 1 will rarely show weathering effects. Those rated 2 will occasionally be troublesome, particularly if weathering products cannot be removed. Glass types rated 3 require the 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: 31.10.2023