TY - GEN
T1 - A multi-step supervisory control strategy for semiconductor device manufacturing
AU - HARRISON, Christopher A.
AU - GOOD, Richard
AU - KADOSH, Daniel
AU - QIN, S. Joe
PY - 2004/12
Y1 - 2004/12
N2 - The goal of this paper is to develop a multi-step optimization framework for a semiconductor manufacturing process. A simple physics model of a flash memory cell is presented to demonstrate the idea, and a multi-step supervisory control strategy is simulated on a flash memory cell manufacturing process based on this model. The multi-step supervisory control strategy performs multiple optimizations of target inputs for a lot with newly available metrology after each step in the course of its processing. The proposed strategy is shown to confer a significant improvement in the control of product quality over a supervisory control strategy which uses a one-time optimization and an open loop implementation. This improvement is primarily due to the ability of the multi-step optimizer to compensate for the effect of error introduced at earlier steps using end-of-step metrology.
AB - The goal of this paper is to develop a multi-step optimization framework for a semiconductor manufacturing process. A simple physics model of a flash memory cell is presented to demonstrate the idea, and a multi-step supervisory control strategy is simulated on a flash memory cell manufacturing process based on this model. The multi-step supervisory control strategy performs multiple optimizations of target inputs for a lot with newly available metrology after each step in the course of its processing. The proposed strategy is shown to confer a significant improvement in the control of product quality over a supervisory control strategy which uses a one-time optimization and an open loop implementation. This improvement is primarily due to the ability of the multi-step optimizer to compensate for the effect of error introduced at earlier steps using end-of-step metrology.
UR - http://www.scopus.com/inward/record.url?scp=14244260332&partnerID=8YFLogxK
U2 - 10.1109/cdc.2004.1429417
DO - 10.1109/cdc.2004.1429417
M3 - Conference paper (refereed)
SN - 0780386825
T3 - Proceedings of the IEEE Conference on Decision and Control
SP - 4237
EP - 4242
BT - 2004 43rd IEEE Conference on Decision and Control (CDC)
PB - Institute of Electrical and Electronics Engineers
T2 - 43rd IEEE Conference on Decision and Control (CDC)
Y2 - 14 December 2004 through 17 December 2004
ER -