Patent ID: 7931755
Filing Date: 2011-04-26
Classification: B08B,F26B

Abstract:
1. A method for removing deposit from a substrate comprising: removing deposit that has attached to a main surface of a substrate from the main surface of the substrate using a number of air knife assemblies in which a slit portion is formed at the rear of the bottom surface so that a fluid can be discharged in band form when each air knife assembly is positioned so that the bottom surface thereof faces the main surface of a substrate and is moved relative to the substrate while a fluid is discharged from the slit portion; forming a fluid introduction path having such a clearance as to make it possible for the fluid discharged from the slit portion to pass through in a condensed state between the main surface of the substrate and the bottom surface of each of the air knife assemblies so as to have an approximately uniform form in the direction perpendicular to the direction in which the air knife assemblies move; discharging a fluid from the slit portion so that the fluid passes through the fluid introduction path in a condensed state, and then the condensed fluid that passes through the fluid introduction path is led to a wall surface that is formed so as to face the front portion of the air knife assemblies or is led to collide with the fluid from an adjacent air knife assembly that operates as a wall surface, and; leading the deposit that has deposited on the substrate away from the main surface of the substrate, together with the fluid, via a fluid lead-out path which is formed between each air knife assembly and the wall surface or fluid from the adjacent air knife so that the cross section of the flow path is greater than that of the fluid introduction path, and allows the condensed fluid discharged from the fluid introduction path to disperse.