Patent ID: 9719869
Date: 2017-08-01
CPC Classifications: B08B,G01L,H01L

Claim:
1. A load measuring apparatus that measures a load applied to a substrate from a roll cleaning tool of a substrate cleaning apparatus, the load measuring apparatus comprising: a waterproof load cell including an elongated load measuring surface having a length that is substantially equal to a diameter of the substrate to be cleaned on which the load is being applied by the roll cleaning tool of the substrate cleaning apparatus; and a base plate having a recess at a center thereof that accommodates the waterproof load cell, wherein the elongated load measuring surface of the waterproof load cell is configured to be pressed directly by the roll cleaning tool of the substrate cleaning apparatus to be used for cleaning the substrate while a cleaning liquid is supplied to the roll cleaning tool thereby measuring the load applied to the waterproof load cell by the roll cleaning tool.