Its photomasks are a key element in the manufacture of semiconductors and flat panel displays and are used as masters to transfer circuit patterns onto semiconductor wafers and flat panel substrates during the fabrication of integrated circuits and a variety of flat panel displays and to a lesser extent other types of electrical and optical components. (borntosell.com)
The most likely cause of the added risk is exposure to ethylene glycol ethers, solvents used in etching circuit patterns on silicon wafers. (newscientist.com)
The technique is also similar to that used in the semiconductor industry to create circuit patterns on a chip by exposing selected sections to ultraviolet light. (scientificamerican.com)