Humidity accuracy and constant control in the production of hi-tech microchip is essential to avoid dimensional changes and prevent the build-up of static electricity. Hygroscopic materials, used in the production process, are more susceptible to dimensional changes due to humidity rather than temperature.

Chips are becoming increasingly smaller, and the distances are now measured in Angstroms. Even a slight variation in the dimensions of a silicon wafer during the photographic masking process causes unacceptable misalignments and the consequent malfunction of the components.

Additionally, many devices used in electronics are extremely sensitive to the presence of static electricity and can be damaged by a static discharge.

Humidifiers are used to keep the environment typically between 50 to 60%rh depending on the process, preventing the static build-up created during manufacturing.