LayTec Flames - Multi-Head Optical Metrology System
LayTec Flames is a multi-head optical metrology system for monitoring multi-layer thin-film structures in large area processes. It measures multi-traces of layer thickness, reflectance, and transmittance uniformity directly after the deposition in in-line processes with thickness resolutions down to less than 1 nm.
Typical applications are functional layers in display industries, foil coating (roll-to-roll), and glass coatings. Flames is suitable for nearly any thin-film production line. With its contact-free optical approach it measures close to the process and allows closed-loop control of layer deposition and etching. With LayTec Flames you get homogeneity information of layers at the tact rate of your line, directly after processing, complete with statistical analysis. You can apply quality thresholds and alarms for fast reaction of operators.
Antireflective coatings on solar glass
In order to minimize efficiency losses due to reflection of sun light on the front glass of PV modules, high-end solar glass is often equipped with an antireflective coating. The coating is deposited as a liquid by spray-coating or by printing techniques. Thereafter it is dried and annealed in consecutive production steps. The properties of the coating must be optimized in a way that the minimum of the reflectance matches the spectral absorption and conversion efficiency of the solar cells. Hence, spectral reflectance measurements directly deliver the most relevant information to characterize the coating in the production line. Fig. 1 shows the reflectance of uncoated glass and of glass coated by two different ARCs.
- Reflectance
- Transmittance
- Layer thickness
In thin-film PV display and glass coating processes!