Electrostatic protection work area EPA control
The division of the anti-static area is based on the possibility of static-sensitive objects in the area. As long as static-sensitive items may appear, it should be defined as an anti-static area, otherwise it can be defined as a non-anti-static area. The boundary range of the anti-static area is determined by the process department and the regional anti-static person.
Conductive containers with shielding properties provide the necessary protection during storage and transfer of static sensitive devices. However, there are also operations outside the shielding container for electrostatically sensitive devices. In this case, the electrostatic sensitive device is very susceptible to damage, so it is necessary to provide a safe working area. The Antistatic Work Area (EPA) is designed for this purpose. In order to ensure the anti-static safety of the workbench, it must meet the following requirements:
(1) All electronic components in the anti-static area should be treated as static sensitive devices.
(2) Operation of any static sensitive device outside the protected state (outside the Faraday cage) must be performed in an antistatic work area.
(3) Electrostatic sensitive devices that are transported in non-antistatic areas between the antistatic work areas must be in a safe state of protection.
(4) The anti-static work area should be designed to ensure that the electrostatically sensitive components are not easily accessible to the metal grounded enclosure of the instrument.
(5) It is forbidden to place static electricity-generating materials that are not necessary for work in the anti-static work area, such as plastic bags, boxes, foams, tapes, notebooks, paper sheets, personal items, etc. that are not treated with anti-static treatment. These materials must be separated from static sensitive devices. More than a centimeter.
(6) All auxiliary materials such as detergents, solvents, coating materials, aerosols, etc. used on the workbench must be approved by the person responsible for static electricity control.