CORNING ULE ZERO EXPANSION GLASS from Bes Optics, Inc. - Corning ULE glass is an Ultra Low Expansion titanium silicate glass manufactured by flame hydrolysis.


		Corning ULE-Zero Expansion Glass


	ULE is an Ultra Low Expansion titanium silicate glass from Corning, manufactured by flame hydrolysis. This glass is formed as large boules, typically 1.5 meters in diameter by 15 cm thick, from which virtually any size product can be made.


		Coefficient of Thermal Expansion

	Radial CTE Range (ppb/degree C)	Axial CTE Range (ppb/degree C)	Optical Retardation (nm/cm)
PREMIUM GRADE	10	10	10
MIRROR GRADE	15	15	20
STANDARD GRADE	15	15	20

TOOLING GRADE

Variation of CTE and optical retardation are not specified for tooling grade. CTE data on actual parts is not available for tooling grade.

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ULE^â, Corning Code 7972 Ultra Low Expansion glassPRIVATE is a titanium silicate glass with unique characteristics that has made it the material of choice in applications ranging from machine tool reference blocks to solid and lightweight mirror blanks for large astronomical telescopes and space satellite applications.

Leading industry experts in the semiconductor integrated circuits manufacturing industry have identified ULE as a "material of choice" for EUV applications.

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