What is electron beam evaporation method?
E-Beam evaporation is a physical vapor deposition (PVD) technique whereby an intense, electron beam is generated from a filament and steered via electric and magnetic fields to strike source material (e.g. pellets of Au) and vaporize it within a vacuum environment.
Table of Contents
What is electron beam evaporation method?
E-Beam evaporation is a physical vapor deposition (PVD) technique whereby an intense, electron beam is generated from a filament and steered via electric and magnetic fields to strike source material (e.g. pellets of Au) and vaporize it within a vacuum environment.
What is crucible evaporation?
The material to be evaporated (the evaporant) is placed in a crucible within the hearth where it is heated to vaporization which then deposits on the substrate to form the required thin film.
How the electron beam evaporator is working in physical vapor deposition process?
Electron beam deposition uses a magnet to focus electrons to form a beam, which is then directed towards a crucible that contains the material of interest. The energy of the electron beam is transferred to the material, which causes it to start evaporating.
What is the advantage of electron beam evaporation?
One of the advantages of E-Beam Evaporation is the ability to rotate several source materials into the path of the electron so that multiple thin films can be deposited sequentially without breaking vacuum.
What is the source of the electron beam?
Thermionic emission of electron Thermionic sources rely on heat to generate electrons, similar to how light is produced by incandescent lightbulbs. As a current is applied to the filament (or crystal), it is progressively heated until its electrons have enough energy to escape the solid surface.
Is evaporating dish a crucible?
The shape of the evaporating dish encourages evaporation in two ways: The shell is relatively flat. A relatively large liquid surface promotes evaporation….Evaporating dish.
| Three evaporation dishes in various sizes | |
|---|---|
| Other names | Evaporating basin |
| Related items | Crucible |
What’s the difference between crucible and evaporating dish?
The key difference between crucible and evaporating dish is that crucible is a container used for the melting of metals or subjecting substances to high temperatures, whereas evaporating dish is a container used for the evaporation of solutions and supernatant liquids.
How does electron beam deposition work?
Electron beam deposition is a method of using electron beams generated from an electron source in a vacuum to irradiate an evaporant material, and heating and evaporating it so that the evaporated material forms a thin film on a substance, such as a substrate or a lens.
Which is disadvantage of electron beam evaporation?
The translational and rotational motion of the shaft helps for coating the outer surface of complex geometries, but this process cannot be used to coat the inner surface of complex geometries. Another potential problem is that filament degradation in the electron gun results in a non-uniform evaporation rate.
How hot is an electron beam?
The kinetic energy is transformed into thermal energy at or near the surface of the material. The resulting heating causes the material to melt and then evaporate. Temperatures in excess of 3500 degrees Celsius can be reached.
What materials can be used in electron beam source crucibles?
Specific grades of high purity materials for use in electron beam sources can be recommended. Testboume provides electron beam source crucibles and formed evaporant material cones which fit directly into the electron beam source crucible. Both the crucibles and cones are available in a variety of materials.
What is the volume of the fabmate e-beam crucibles?
FABMATE E-Beam Crucibles Description Pocket Volume Liner Volume (cc) Part Number Price In Stock Add To Cart Description Pocket Volume Liner Volume (cc) Part Number Price In Stock Add To Cart FABMATE 12 7.4
What type of crucibles does testboume provide?
Testboume provides electron beam source crucibles and formed evaporant material cones which fit directly into the electron beam source crucible. Both the crucibles and cones are available in a variety of materials. Please use this Crucible Selection Table to choose required crucibles for specific materials.
What is the electron beam evaporation technique?
The electron beam evaporation technique enables very high temperatures to be obtained, allowing fast deposition rates and a wide range of materials to be evaporated. The technique is controllable, repeatable and compatible with the use of an ion source to enhance the resultant thin film performance characteristics.
