DAVID PARKER / SEAGATE MICROELECTRONICS LTD / SCIENCE PHOTO LIBRARY DAVID PARKER / SEAGATE MICROELECTRONICS LTD / SCIENCE PHOTO LIBRARY
Technician wearing clean room clothing making visual inspection of silicon wafers for possible defects using a black ray lamp. Numerous rectangular integrated circuits (silicon chips) are constructed from a wafer of crystalline silicon; the chips will ultimately be diced from the completed wafers. Each chip will comprise a complicated pattern of embedded zones created by successive imaging, etching and deposition or growth processes. Absolute cleanliness is vital throughout the manufacturing process; one source of contamination might ruin an entire batch of almost finished wafers.
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