1.Abstract: Microcircuit speciments respectively made of 4 kinds of molded plastic and 2 kinds of coating material for chip have been stored at Xisha NaturalExposure Station for 22 months.
2.The natural precipitation method was performed for 10-minute exposure, and the impacting method was performed by FA-1 airborne bacteria sampler at flow rate of 28.3 L/min for 1 min, 10 min and 15 min.