Patent ID: 6573126
Filing Date: 2003-06-03
Classification: H01L,Y10S

Abstract:
A method for forming a semiconductor structure, the method comprising:forming a first heterostructure by: depositing a graded Si1âˆ’xGex buffer layer on a first substrate, the graded Si1âˆ’xGex buffer layer having a Ge concentration x increasing from zero to a value y; depositing a relaxed Si1âˆ’yGey layer on the graded Si1âˆ’xGex buffer layer; and introducing ions into said relaxed Si1âˆ’yGey layer to form a buried layer; bonding said first heterostructure to a second substrate to form a second heterostructure; and splitting said second heterostructure at the buried layer, wherein a top portion of said relaxed Si1âˆ’yGey layer remains on said second substrate after the second heterostructure is split.