Patent ID: 9170496
Filing Date: 2015-10-27
Classification: B08B,G03F

Abstract:
1. A method for pre-treating a wafer surface, the method comprising: positioning a wafer on a rotating apparatus; rotating the wafer at a first rotational speed between about 50 revolutions per minute (rpm) and about 300 rpm and for a period of about 1 second to about 10 seconds while simultaneously dispensing a cleaning solvent at or near a center of a top surface of the wafer for spreading the cleaning solvent thereon; rotating the wafer at a second rotational speed between about 500 rpm and about 1,500 rpm and for a period of about 1 second to about 10 seconds; and rotating the wafer at a third rotational speed between about 50 rpm and about 300 rpm and for a period of about 1 second to about 5 seconds such that the cleaning solvent has conformal coverage on the surface of the wafer.