| | on front   Spectroscopic ellipsometry film thickness measurement | 
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        | Batch size | 1 | 
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            | Refractive index | 1 .. 4 | 
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            | Sides processed | either | 
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            | Thickness | 0.01 .. 5 µm | 
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            | Wafer size |  | 
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            | Equipment | Gaertner Ellipsometer | 
            
            
              | Equipment characteristics: | 
            | Wafer geometry Types of wafers this equipment can accept | 1-flat, 2-flat | 
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            | Wafer holder Device that holds the wafers during processing. | metal chuck | 
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            | Wafer materials List of wafer materials this tool can accept (not list of all materials, just the wafer itself). | silicon, silicon on insulator, Pyrex (Corning 7740), quartz (single crystal), sapphire | 
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            | Wafer thickness List or range of wafer thicknesses the tool can accept | 300 .. 800 µm | 
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