Fused Quartz Optical Properties

The type of manufacturing method and the raw materials used dictate the final properties of the fused quartz produced. The degree of transparency reflects the material purity. The UV cutoff ranges from about 155 to 175 nm for fused quartz, and is an indicator of material purity. In the IR range, the infrared transmission extends to approximately 4 micrometers with little absorption at 2.73 micrometers (the water band). This means that the quartz is electrically fused, rather than flame fused (or "wet" quartz).

GE Clear Fused Quartz

GE 124 clear fused quartz, for quartz wafers and substrates, is produced from silica sand by electric fusion and therefore has a UV cutoff for 1mm thickness at <160 nm, a slight absorption at 245 nm and no appreciable absorption at 2.73 micrometers due to hydroxyl ions.

Index of Refraction

IR Transmission

Transmission Calculator

Nominal Purity: 99.999 W% SiO2

Mechanical Properties

Electrical Properties

Fused Quartz Wafers and Substrates

Wafer and substrates can be processed as large as 12" square or 12" diameter with almost perfect surface finish of <10/5 or 5-10 Angstroms. Many sizes available from stock ranging from .133" (3.4mm) square to 7.87" (200mm) diameter. Thicknesses range from ultra-thin < 100um to 250um, 500um, 1mm, 1.5mm, 2mm and up. Custom thicknesses and sizes also available.

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Updated: 27 September 2008

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