Patent ID: 7648576

Claim:
A method for producing an epitaxial wafer by depositing a film of epitaxial layer through an epitaxial growth over a top surface of a silicon wafer, said method comprising: cleaning a top surface and a back surface of a silicon wafer with a SC-1 liquid and a SC-2 liquid; a hydrophobicating cleaning, after said SC-1 and SC-2 liquid cleaning, for cleaning said back surface of said silicon wafer to be a water repellent surface; and a hydrophilicating cleaning for cleaning said top surface of said silicon wafer to be a hydrophilic surface, wherein after said SC-1 and SC-2 liquid cleaning, said hydrophobicating cleaning, and said hydrophilicating cleaning are finished, a film of epitaxial layer is deposited through an epitaxial growth over said top surface of said silicon wafer, and wherein said hydrophobicating cleaning and said hydrophilicating cleaning are simultaneously performed.