Difference between revisions of "Deposition"
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Revision as of 11:48, 28 December 2015
Deposition is any process that grows, coats, or otherwise transfers a material onto the substrate.
- 1 Technologies
- 2 Figures of merit
Typical technologies include atomic layer deposition (ALD), chemical vapor deposition (CVD), electrodeposition/ electroplating or electrochemical deposition (ECD), and physical vapor deposition (PVD).
Atomic layer deposition (ALD)
Atomic Layer Deposition (ALD) at the LNF is performed on the Oxford OpAL ALD system that currently offers three films Alumina/Aluminum Oxide (Al2O3), Hafnia/Hafnium Oxide (HfO2), and Zinc Oxide (ZnO).
Chemical vapor deposition (CVD)
Chemical vapor deposition (CVD) consists of the substrate being exposed to one or more volatile precursors, which react and/or decompose on the substrate surface to produce the desired deposit. There are many methods for enhancing the chemical reaction rates of the precursors. The LNF has fourteen Low Pressure CVD (LPCVD) furnace tubes and five Plasma Enhanced CVD (PECVD) chambers.
Electrodeposition/ Electroplating/ Electrochemical deposition (ECD)
Physical vapor deposition (PVD)
Physical vapor deposition (PVD) describes a variety of vacuum deposition methods used to deposit thin films by the condensation of a vaporized form of the desired film material onto various substrates.
Figures of merit
The amount of material deposited in units of time, typically expressed in angstroms per second or minute.
Defines optical properties of a given material for a specific frequency or wavelength of light. Also known as index of refraction n.
The elastic mismatch between the thin film deposited and the substrate that results in a change in substrate curvature. Residual stress is typically defined by a unit of measurement (MPa) across a given area.