Thickness range of transparent films |
0 - 6000 nm |
Thickness range of absorptive films |
0 - 6000 nm |
Range of angle of incidence |
10 - 90° |
Reflection angle steps |
5° ± 0.01° |
Accuracy of refractive index measurement |
0.0001 |
Accuracy of film thickness measurement |
± 0.001 nm for SiO2 standard sample |
Stability |
Long term ( months ) ± 0.01° in D |
Measurement time |
less than 1 sec |
Sample stage |
Wafer chuck up to 200 mm diameter |
Sample stage adjustments |
Tilt and height |
Sample alignment |
Second laser alignment with automatic correction unit |
Standard wavelength |
632.8 nm |
Optional wavelength |
543 nm, 594 nm, 612 nm, 633 nm and 1150 nm or by request |