METHOD OF CREATING DEFECT FREE HIGH GE CONTENT (25%) SIGE-ON-INSULATOR (SGOI) SUBSTRATES USING WAFER BONDING TECHNIQUES

摘要

A method for achieving a substantially defect free SGOI substrate which includes a SiGe layer that has a high Ge content of greater than about 25% atomic using a low temperature wafer bonding technique is described. The wafer bonding process described in the present application includes an initial prebonding annealing step that is capable of forming a bonding interface comprising elements of Si, Ge and O, i.e., interfacial SiGeO layer, between a SiGe layer and a low temperature oxide layer. The present invention also provides the SGOI substrate and structure that contains the same