Patent ID: 8218145
Filing Date: 2012-07-10
Classification: G01N

Abstract:
1. A particle monitor system that detects particles in an exhaust pipe of a substrate processing apparatus having a housing chamber in which a substrate is housed and subjected to processing, an exhausting device that exhausts gas out of the housing chamber, and the exhaust pipe that communicates the housing chamber and the exhausting device together, the particle monitor system comprising: a laser light irradiating device that is disposed on the exhaust pipe and irradiates laser light toward a space in the exhaust pipe into which the particles flow; and a laser light measurement device that is disposed on an optical path of the laser light having passed through the space in the exhaust pipe and measures energy of the laser light, wherein the particle monitor system detects particles that flow into the space based on a difference between an energy of the laser light irradiated from the laser light irradiating device and an energy of the laser light measured by the laser light measurement device.