Patent ID: 7354524
Filing Date: 2008-04-08
Classification: H01J,H01L

Abstract:
1. A method of manufacturing a microelectronic device having at least a first and second layer, the method comprising the steps of: providing a substrate; storing a first target thickness for a first layer and a second target thickness for a second layer; determining a first rate for processing said first layer and identifying a first optical characteristic of said first layer by interferometry; processing said first layer based on said first rate for processing; calculating in real time a dynamic film thickness of said first layer as the processing progresses, and determining if the calculated dynamic film thickness is the same as said first target thickness; repeating said processing and said calculating step until said first target thickness and said calculated dynamic film thickness are the same; determining a second processing rate for said second layer and identifying a second optical characteristic of said second layer by interferometry; and processing said second layer to said second target thickness based on said second processing rate.