Patent ID: 7279400
Filing Date: 2007-10-09
Classification: H01L,Y10S

Abstract:
1. A method of fabricating a silicon-on-plastic layer via layer transfer comprising: seriatim preparing a silicon substrate; depositing a layer of SiGe on the silicon substrate; depositing a layer of strained silicon on the SiGe layer; depositing a layer of insulator on the silicon layer; implanting splitting hydrogen ions into the silicon substrate; preparing a glass substrate; bonding the glass substrate to the silicon layer to form a composite wafer; splitting the composite wafer to provide a split wafer having, in seriatim, a glass substrate, a layer of strained silicon; a layer of SiGe; and silicon layer split from the silicon substrate; dry etching the split wafer to remove the silicon layer split from the silicon substrate and a portion of the SiGe layer; annealing the split wafer to increase the bond between the silicon and the glass substrate; selectively etching the split wafer to remove any remaining SiGe, thereby forming a silicon-on-glass wafer having a glass side and a silicon side; depositing a dielectric on the silicon side of the silicon-on-glass wafer; preparing a plastic substrate; applying adhesive and bonding the plastic to the silicon side of the silicon-on-glass wafer; removing the glass from the glass side of the bonded, silicon-on-glass wafer to form a silicon-on-plastic wafer; and completing a desired IC device on the silicon-on-plastic.