Semiconductor

Semiconductor

Frequency of light replacement is significantly reduced with long life lighting

Yearly downtime caused by short life of fluorescent lights

Silicon wafer is a thin disc of semiconductor material with only a thickness of a few millimeters. The wafer is coated with photoresist and the circuit pattern is transferred to the wafer by light exposure. Therefore, in a semiconductor manufacturing process, yellow fluorescent lights with long wavelength have been used so that it does not interfere with the photoresist process before light exposure. However, fluorescent lights last for only about a year, so they need to be replaced every year. As a result, semiconductor manufacturing factories must stop production in order to replace fluorescent lights. Furthermore, fluorescent lights contain a small amount of mercury, and there is a possibility that they will not be able to be used in the future. In October 2013, 92 countries signed the Minamata Convention on Mercury, to regulate activities including mining, usage, and disposal of mercury. When this treaty goes into effect, production will decrease and it would become difficult to secure supplies of fluorescent lights globally.

Long life illumination reduces light replacement frequency to approximately 1/5 using IDEC LED Lights

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