the application of pure water.
The ultimate goal for quality control in industries is to produce a product water which cotains nothing but water. we use resistivity to determine the quality of the product water. pure water is not a good conductor of electricity.
for expmale:
In Semiconductors the chip have to be rinsed to remove any particulates and also remove the last traces of the acid used for etching. and the electrode patterns have a width of approximately 0.1 micron. if the rinse water contains any particulates or dissolved substances they would on evaporation of the water leave such substances to alter the desired behavior of the device.
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