Patent ID: 6491760
Filing Date: 2002-12-10
Classification: B08B,G05G,H01L,Y10S

Abstract:
A scrub washing method of scrubbing a substrate with a scrub member while a washing liquid is supplied to the substrate by transmitting a pressing force and a rotation driving force to the scrub member by means of an output shaft and a rotation drive shaft, the output shaft being engaged with the rotation drive shaft and arranged on an extension line of the rotation drive shaft, and having a portion that is located in an air cylinder, said portion being equipped with a stopper, said washing method comprising the steps of:(a) measuring a scrub contact pressure applied to a sensor from the scrub member by bringing the scrub member into contact with the sensor at a home position, obtaining data of electrical signal when the scrub contact pressure becomes equal to a desired pressure on the basis of the measuring results, and storing said data in a memory; (b) mounting the substrate on a mounting table; (c) moving the scrub member above the substrate mounted on the mounting table; (d) moving down the scrub member together with the output shaft by supplying air around the output shaft in the air cylinder; (e) transmitting a rotation drive force to the output shaft from the rotation drive shaft to rotate the scrub member; and (f) retrieving said data from the memory and adjusting the pressing force of the scrub member to the substrate such that the scrub member applies the desired pressure to the substrate based on the retrieved data by supplying air towards the stopper in the air cylinder and applying thrust upwardly to the output shaft.