Prometrix SpectraMap SM30

Listing description

The Prometrix SpectraMap is a spectrophotometer. The basic operating principle is that the intensity of monochromatic reflected light depends strongly on film thickness because of interference.
•Model SM300
•The film thicknesses are comparable to the wavelength of the incident light.
•The machine uses a computer-controlled grating monochromator and a photomultiplier tube detector to measure the reflected optical spectrum over the 350 to 800 nm wavelength band) from a bare silicon reference wafer and from the wafer under test.
•Given an index of refraction for a thin film and the two measured spectrums, the computer will analyze the interference pattern to determine film thickness

This equipment is located in US