Patent ID: 9704728
Date: 2017-07-11
CPC Classifications: H01L

Claim:
1. A substrate cleaning apparatus for cleaning a substrate, comprising: a roll holder configured to support a horizontally elongated roll cleaning member and rotate said roll cleaning member; a vertical movement mechanism having an actuator and a regulating device configured to regulate output of the actuator, said vertical movement mechanism being configured to vertically move said roll holder so that said roll cleaning member applies a roll load to the substrate at the time of cleaning the substrate by actuation of said actuator; a load cell configured to measure said roll load; a controller configured to perform feedback control of said roll load through said regulating device based on the measured value of said load cell, wherein said feedback control is performed so that said controller outputs an operation amount to said regulating device depending on a difference between the measured value of said load cell and a preset roll load; and a monitor unit configured to monitor whether said operation amount outputted to said regulating device falls outside a preset allowable range of operation amount preset based on said preset roll load and configured to detect said operation amount falling outside said present allowable range, wherein said monitor unit outputs a signal when said operation amount outputted to said regulating device falls outside said preset allowable range of operation amount.