Atomic Layer Deposition.ppt

Atomic Layer Deposition (ALD) Presented by Myo Min Thein EE 518 Class Presentation, Penn State Spring 2006 Instructor: Dr. J. Ruzyllo Presentation Overview Definition of ALD Brief history of ALD ALD process and equipments ALD applications Summary Definition of ALD ALD is a method of applying thin films to various substrates with atomic scale precision. Similar in chemistry to chemical vapor deposition (CVD), except that the ALD reaction breaks the CVD reaction into two half-reactions, keeping the precursor materials separate during the reaction. ALD film growth is self-limited and based on surface reactions, which makes achieving atomic scale deposition control possible. By keeping the precursors separate throughout the coating process, atomic layer thickness control of film grown can be obtained as fine as atomic/molecular scale per monolayer. Definition of ALD ALD is a method of applying thin films to various substrates with atomic scale precision. Similar in chemistry to CVD, except that the ALD reaction breaks the CVD reaction into two half-reactions, keeping the precursor materials separate during the reaction. ALD film growth is self-limited and based on surface reactions, which makes achieving atomic scale deposition control possible. By keeping the precursors separate throughout the coating process, atomic layer thickness control of film grown can be obtained as fine as atomic/molecular scale per monolayer. Definition of ALD ALD is a method of applying thin films to various substrates with atomic scale precision. Similar in chemistry to chemical vapor deposition (CVD), except that the ALD reaction breaks the CVD reaction into two half-reactions, keeping the precursor materials separate during the reaction. ALD film growth is self-limited and based on surface reactions, which makes achieving atomic scale deposition control possible. By keeping the precursors separate throughout the coating process, atomic layer thickness control of film grown can be obtained