Patent ID: 7727867
Filing Date: 2010-06-01
Classification: H01L

Abstract:
1. A method for manufacturing a SIMOX wafer sequentially comprising: heating a wafer to a temperature in the range of 200 to 600° C. and implanting oxygen ions from a surface of a silicon wafer in an ion-implanting device and to form a first ion-implanted layer having a peak oxygen concentration at a depth d implanting the oxygen ions from the surface of the wafer having the first ion-implanted layer formed therein in the ion-implanting device to form a second ion-implanted layer that is in an amorphous state such that the second ion-implanted layer has a damage peak at a depth d subjecting the wafer to a high temperature heat treatment in a furnace in an atmosphere containing oxygen wherein the temperature is elevated to not lower than 1300° C. but lower than the melting point of silicon to change the first and the second ion-implanted layers into a BOX layer, wherein an oxygen ion dose amount for formation of the first ion-implanted layer is 1.25 to 1.5×10 elevating a temperature from 1320 to 1350° C. in an atmosphere containing an inert gas and oxygen of 0 to 5.0 volume %, holding the elevated temperature for 6 to 36 hours in an atmosphere containing a mixture of an inert as and oxygen of 10.0 to 50.0 volume %; and cooling the wafer to room temperature.