Patent ID: 6293288
Filing Date: 2001-09-25
Classification: B08B,H01L

Abstract:
A cleaning apparatus comprising:a processing tank for accommodating an object to be processed;a rinse liquid supply pipeline connected to said processing tank to supply a rinse liquid into said processing tank;a chemical supply pipeline connected to said rinse liquid supply pipeline through a switching valve, to supply a chemical into said rinse liquid supply pipeline so that a mixture of said rinse liquid and said chemical is supplied into said processing tank to process the object within the processing tank;a temperature sensor for detecting a temperature of said rinse liquid or said mixture of the rinse liquid and the chemical, to output a temperature signal; andcontrol means for determining a length of a supply time in which said chemical is supplied into said rinse liquid;said control means being so configured that it compares said temperature signal with a reference temperature stored in the control means, rectifies said supply time to be longer than a previously stored reference supply time set for a reference temperature if the detected temperature is lower than said reference temperature, and rectifies said supply time to be shorter than said reference supply time if the detected temperature is higher than said reference temperature.