Nonlinear Generalized Predictive Control of the Crystal Diameter in CZ-Si Crystal Growth Process Based on Stacked Sparse Autoencoder

2020 ◽  
Vol 28 (3) ◽  
pp. 1132-1139 ◽  
Author(s):  
Ding Liu ◽  
Ni Zhang ◽  
Lei Jiang ◽  
Xiao-Guo Zhao ◽  
Wei-Feng Duan
Keyword(s):  
Crystal Growth ◽  
Predictive Control ◽  
Growth Process ◽  
Generalized Predictive Control ◽  
Crystal Growth Process ◽  
Crystal Diameter ◽  
Sparse Autoencoder ◽  
Stacked Sparse Autoencoder ◽  
Nonlinear Generalized Predictive Control

Control and System Design for the Czochralski Crystal Growth Process

1993 ◽  
Vol 115 (1) ◽  
pp. 115-121 ◽  
Author(s):  
M. A. Gevelber ◽  
G. Stephanopoulos
Keyword(s):  
Crystal Growth ◽  
Growth Process ◽  
Operating Regime ◽  
Growth Cycle ◽  
Lumped Parameter Model ◽  
Interface Shape ◽  
Control Structures ◽  
Czochralski Crystal Growth ◽  
Crystal Growth Process ◽  
Crystal Diameter

An expanded set of control objectives is proposed for the Czochralski crystal growth process. Consideration of the thermal stress near the interface yields an operating regime specification in terms of interface shape. A lumped parameter model is used to determine the performance of alternate inputs and outputs. Based on these considerations, a new control structure is proposed to maintain crystal diameter, interface shape, and thermal gradients throughout the batch growth cycle. The performance of alternative control structures are evaluated.

scholarly journals Model Predictive Control of the Vertical Gradient Freeze Crystal Growth Process

2021 ◽  
Vol 54 (6) ◽  
pp. 218-225
Author(s):  
Stefan Ecklebe ◽  
Tom Buchwald ◽  
Patrick Rüdiger ◽  
Jan Winkler
Keyword(s):  
Crystal Growth ◽  
Model Predictive Control ◽  
Predictive Control ◽  
Growth Process ◽  
Vertical Gradient ◽  
Crystal Growth Process ◽  
Vertical Gradient Freeze

Experimental Verification of the Numerical Model for a CaF2 Crystal Growth Process

2002 ◽  
Vol 37 (1) ◽  
pp. 77-82 ◽  
Author(s):  
A. Molchanov ◽  
U. Hilburger ◽  
J. Friedrich ◽  
M. Finkbeiner ◽  
G. Wehrhan ◽  
...  
Keyword(s):  
Crystal Growth ◽  
Numerical Model ◽  
Experimental Verification ◽  
Growth Process ◽  
Caf2 Crystal ◽  
Crystal Growth Process

Purification of organic compounds in high-quality crystal growth process

2000 ◽  
Vol 66 (2-3) ◽  
pp. 303-308 ◽  
Author(s):  
C Salati ◽  
G Mignoni ◽  
M Zha ◽  
L Zanotti ◽  
C Mucchino ◽  
...  
Keyword(s):  
Crystal Growth ◽  
Organic Compounds ◽  
Growth Process ◽  
High Quality ◽  
Crystal Growth Process
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