Patent ID: 7435301
Filing Date: 2008-10-14
Classification: C11D,H01L,Y10S

Abstract:
1. A method for cleaning a semiconductor device comprising: preparing a cleaning solution comprising from about 0.01 to about 2.5 percent by weight of a non-ionic surfactant, from about 0.05 to about 5.0 percent by weight of an alkaline compound, from about 0.01 to about 2.5 percent by weight of a metal corrosion inhibitor and from about 90 to about 99.9 percent by weight of pure water with respect to the cleaning solution; and cleaning an MIS (Metal-Insulator-poly Silicon) capacitor in which an upper electrode of the MIS capacitor comprises a silicon germanium layer using the cleaning solution, while preventing damage to the silicon germanium layer and removing impurities present at a surface portion of the silicon germanium layer.