Patent ID: 7526948
Filing Date: 2009-05-05
Classification: G01N,H01L

Abstract:
1. A detection method for detecting a foreign material on a surface of a plasma processing apparatus, the method comprising steps of: using a gauge head having a gas blow out opening, arranged at a central portion of a surface of the gauge head, for intermittently blowing a gas of a predetermined pressure from the gas blow out opening to a measurement portion of the surface of the plasma processing apparatus, and a gas suction opening, arranged outside of the central portion of the surface of the gauge head, for sucking the foreign material discharged by the gas blown out from the gas blow out opening; intermittently supplying gas of a predetermined pressure through the gas blow out opening to the measurement portion of the surface opposing the gauge head; and sucking a predetermined amount of gas through the gas suction opening from a proximity of the measurement portion of the surface of the plasma processing apparatus, and counting the number of foreign material particles contained in the sucked amount of gas.