Patent ID: 7969572
Filing Date: 2011-06-28
Classification: G01N

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