| |   Spectroscopic Ellipsometric Single Point Film Thickness Measurement | 
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        | Materials | aluminum nitride, PZT, silicon dioxide on silicon, silicon nitride on silicon | 
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            | Refractive index | 1 .. 4 | 
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            | Thickness | 0.01 .. 2 µm | 
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            | Wafer size |  | 
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            | Equipment | Woollam Spectroscopic Ellipsometer | 
            
            
              | Equipment characteristics: | 
            | Batch sizes | 50 .. 150 mm: 1 | 
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            | Piece dimension Range of wafer piece dimensions the equipment can accept | 50 .. 150 mm | 
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            | Piece geometry Geometry of wafer pieces the equipment can accept | circular, irregular, other, rectangular | 
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            | Piece thickness Range of wafer piece thickness the equipment can accept | 200 .. 700 µm | 
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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 | 
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