Schott AF 32® eco Ultra-Thin Glass

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Schott AF 32® eco Ultra-Thin Glass
Categories:	Ceramic; Glass; Optical
Material Notes:	AF 32® eco is an alkali-free flat glass produced by a SCHOTT specific down-draw technology, enabling production in a thickness range from 0.03 mm to 1.1 mm. Its fire-polished surface results in a low roughness value. The coefficient of thermal expansion of AF 32® eco matches silicon, therefore it is the perfect choice as optical packaging material in semiconductor related applications. Due to its high transformation temperature it can be used for high temperature applications up to approx. 600 °C. AF 32® eco is available in wafer format and is manufactured with eco-friendly refining agents. Applications: Wafer Level Chip Size Packaging Coefficient of thermal expansion match to silicon High transmittance Large sheet format suitable for 12-inch wafers Information provided by SCHOTT.
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Physical Properties	Original Value	Comments

Density	2.43 g/cc
Thickness	30.0 - 110 microns

Mechanical Properties	Original Value	Comments
Hardness, Knoop	580	0.1/20
Modulus of Elasticity	74.8 GPa

Electrical Properties	Original Value	Comments
Dielectric Constant	5.1 @Frequency 1e+6 Hz
	5.1 @Frequency 1e+9 Hz
	5.1 @Frequency 5.00e+9 Hz
Dissipation Factor	0.0030 @Frequency 1e+6 Hz
	0.0040 @Frequency 1e+9 Hz
	0.0050 @Frequency 5.00e+9 Hz

Thermal Properties	Original Value	Comments
CTE, linear	3.20 µm/m-°C @Temperature 20.0 - 300 °C
Thermal Conductivity	1.16 W/m-K @Temperature 90.0 °C
Transformation Temperature, Tg	717 °C

Optical Properties	Original Value	Comments
Refractive Index	1.509
Transmission, Visible	91.9 %	D65

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CSGT9946 / 183199

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