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CONTROL-ORIENTED MODELING AND FEEDBACK CONTROL OF REACTIVE SPUTTERING

PRESENTED BY THE RUNNING EXAMPLE OF DEPOSITING ALUMINUM OXIDE BY MEANS OF AN RF

Autor: WÖLFEL, CHRISTIAN

Sección: TECNOLOGÍA - Mecánica

CONTROL-ORIENTED MODELING AND FEEDBACK CONTROL OF REACTIVE SPUTTERING

CONTROL-ORIENTED MODELING AND FEEDBACK CONTROL OF REACTIVE SPUTTERING

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Publicación:
03/03/2021
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Sinopsis

This thesis investigates the nonlinear reactive sputter process in a novel way: both from the control-theoretical side and from the plasma-physical side. The plasma behavior is explicitly considered for the process modeling and for the design of the control system to establish steady-state plasma conditions. By use of one of the presented control systems an unstable operation point of the …

This thesis investigates the nonlinear reactive sputter process in a novel way: both from the control-theoretical side and from the plasma-physical side. The plasma behavior is explicitly considered for the process modeling and for the design of the control system to establish steady-state plasma conditions. By use of one of the presented control systems an unstable operation point of the process can be stabilized, which enables high deposition speed and a stoichiometric thin film subject to steady-state plasma conditions. In this framework, the plasma state is either defined by the self-bias voltage or the electron density. The application of the Multipole Resonance Probe allows to control the electron density as a quantity that directly characterizes the plasma state. Experimental results validate the applicability of the developed models and of the developed control systems for various process conditions. Algorithms summarize the steps for the model identification as well as for the control system design. In addition, the technical components of the experimental set-up and dominant process drifts that occur are described in detail.
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CONTROL-ORIENTED MODELING AND FEEDBACK CONTROL OF REACTIVE SPUTTERING

Editorial:
-
Fecha Publicación:
Formato:
Normal tapa dura (libros)
ISBN:
978-3-7526-7105-6
EAN:
9783752671056
Nº páginas:
0
Colección:
Lengua:
INGLES
Alto:
276 mm
Ancho:
195 mm
Sección:
TECNOLOGÍA
Sub-Sección:
Mecánica
Christian Woelfel is postdoctoral researcher at Ruhr University Bochum, Germany. In his work, he combines the fields of control engineering and plasma science to develop an advanced plasma-oriented control strategy for vacuum processes. His research interests are focused on the modeling and control of physical systems against the background of interdisciplinary research themes that include plasma-based processes, process instrumentation and control theory.

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