Patent ID: 6521042
Filing Date: 2003-02-18
Classification: B82Y,C30B,H01L,Y10T

Abstract:
An apparatus for molecular beam epitaxy layer growth by using a process model of non-thickness data having model data relating to layer growth, comprising:a MBE growth chamber for directing a first beam of a first growth species at a wafer in a growth chamber to grow a first layer of said first growth species; a mass spectrometer for measuring the flux of the reflection of said first beam from said wafer to obtain a first thickness measurement of said first layer; a controller for comparing said first thickness measurement with said process model of non-thickness data based on said model data relating to said layer growth and to obtain second target thickness of a second layer to be grown; said MBE growth chamber directing a beam of a second growth species at said wafer in said growth chamber; and said MBE growth chamber terminating said second beam of said second growth species when said second target thickness has been reached in response to said controller.