Because ESD control is an ongoing program, we established operating procedures and regular audits. Permanent conductivity is built into the vinyl tile, so the floor never needs waxing for ESD control or brightness. When the tile becomes soiled, the facilities manager cleans and buffs it to its original whiteness and sheen. Training in the basics of static control is given to new employees and repeated for all employees on an annual basis. All employees test their foot straps twice a day in the morning upon entering the plant and after lunch and sign a log-in sheet.
Continuous monitoring makes wrist-strap testing unnecessary.
If the wrist skin becomes dry, the worker applies a lotion that does not contain silicon or oil, potential circuit-board contaminants. The company prequalifies suppliers of ESD handling and packaging, and a receiving clerk inspects materials as they arrive. Finished products are packaged in ESD bags and secured with ESD tape for shipping. Along with ISO 9000 registration, the ESD control program is used as a sales and marketing tool, particularly when customers tour the factory. Employees understand the program s importance and appreciate the results.