can't read?
Silicon wafers or a “slice” of substrate find applications in the fabrication of integrated circuits, solar cells etc. They serve as a substrate for various microelectronic devices.
SW 207 (OTTO) Silicon wafer, <111>, dia x thickness 25.4 mm x 0.5 mm - used in electronics for the fabrication of integrated circuits and in photovoltaics for conventional, wafer-based solar cells.