Patent ID: 6930017
Filing Date: 2005-08-16
Classification: H01L,Y10S

Abstract:
1. A method of cleaning a semiconductor wafer including at least one registration mark, comprising: providing a semiconductor wafer comprising at least one registration mark, the at least one registration mark comprising at least one trench having a trench width from approximately 1.0 μm to approximately 3.0 μm; exposing the semiconductor wafer to a cleaning solution comprising tetramethylammonium hydroxide and at least one surfactant, the at least one surfactant comprising α-(nonylphenyl)-omega-hydroxy-branched poly (oxy-1,2-ethanediyl) and 2,4,7,9-tetramethyl-5-decyne-4,7-diol-ethoxylate; and exposing the semiconductor wafer to ultrasonic or megasonic vibrational energy.