Class 100 / Level 5 Clean Room

Cokeva operates a 3,000 square foot, class 100, level 5 clean room within its Roseville repair facility. The clean room gives Cokeva the capability to perform sensitive repairs and perform controlled environment build/assembly work.

Cokeva is also able to offer screening and packaging services on photographic, optical/mechanical and semiconductor equipment. The clean room will also enable Cokeva to provide services for storage and LCD technologies.

The clean room is designed in accordance with laminar flow principles with unidirectional filtered airflow flowing at a uniform velocity range with minimal turbulence. The principle is based on removing any dust in the airflow via the shortest route. The greater rate that this airstream is renewed, the lower any contamination build up and a higher rate impurity dilution. Cokeva uses a vertical down-flow of filtered air while vents in the base of the walls provide an exit. The room features positive-pressure where the air pressure inside is greater than the outside, preventing contaminants from entering the room.

The classification refers to the maximum number and size of particles (in microns) permitted per volume of air. In the Class 100 clean room, only 100 particles measuring about 0.5 micron are allowed per cubic feet of air. A micron is a millionth of a meter — for a sense of how small it is, the human hair measures about 100 microns wide.

A clean room is an environment, typically used in manufacturing or scientific research that has a low level of environmental pollutants such as dust, airborne microbes, aerosol particles and chemical vapors. The temperature and humidity is controlled to protect sensitive equipment from contamination. Cokeva’s clean room is certified annually. Tests are performed on filters, airflow velocity, airborne particle count and classification, room pressures and temperature/humidity.