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Ultra-flat glass substrates coated with a 20 nm layer of synthetic quartz. Small squares of ITO (indium tin oxide) in the corners help identify the SiO2 coated side.
For many applications standard glass is simply not good enough due to either surface roughness or wettability. These synthetic quartz covered substrates are useful for a variety of activities such as absorption/PL measurements, OFET fabrication, and surface profilometry.
Specifications
Substrate Sizes
20 mm x 15 mm 25 mm x 25 mm 25 mm x 75 mm (Microscope slide)
Thickness
1.1 mm
Glass Type
Polished soda lime, float glass
Substrate Coating
20 nm SiO2
Refractive Index
1.5
Flatness
50 nm per 20 mm (typical)
Glass Roughness
1 nm RMS (by AFM)
Transmission
Comparison between the optical transmission of a quartz-coated substrate (grey line) and a sapphire substrate (blue line).
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