What is sputtering and its types?
What is sputtering and its types?
Sputtering is a physical process in which atoms in a solid-state (target) are released and pass into the gas phase by bombardment with energetic ions (mainly noble gas ions). Sputtering is usually understood as the sputter deposition, a high vacuum-based coating technique belonging to the group of PVD processes.
What kind of coating is DC sputtering used for?
Traditional DC Sputtering is a cost effective way of applying metal target coatings that are electrical conductors like gold. However, DC Sputtering is limited when it comes to dielectric target materials – coatings which are non-conducting insulating materials that can take on a polarized charge.
What are the benefits of RF magnetron sputtering?
In this way, RF Magnetron Sputtering allows for higher current at lower gas pressure that achieves an even higher deposition rate. While RF Sputtering offers many very attractive benefits depending upon the type of material to be coated, there are several important costs involved that must be considered.
What causes the circular pattern in magnetron sputtering?
With Magnetron Sputtering, a circular pattern becomes etched into the surface of the target material as a result of the circular magnetic field of the magnetron focusing the charged plasma particles close to the surface of the sputter target. The diameter of the circular pattern is the result of the magnetic field.
What kind of magnetrons are used for sputter deposition?
Sputtering sources often employ magnetrons that utilize strong electric and magnetic fields to confine charged plasma particles close to the surface of the sputter target.
Sputtering sources often employ magnetrons that utilize strong electric and magnetic fields to confine charged plasma particles close to the surface of the sputter target.
How is the composition of a film controlled by sputtering?
The chemical reaction that the particles undergo is with a reactive gas introduced into the sputtering chamber such as oxygen or nitrogen; oxide and nitride films are often fabricated using reactive sputtering. The composition of the film can be controlled by varying the relative pressures of the inert and reactive gases.
Is the sputtering process performed top down or bottom down?
Sputtering sources contain no hot parts (to avoid heating they are typically water cooled) and are compatible with reactive gases such as oxygen. Sputtering can be performed top-down while evaporation must be performed bottom-up. Advanced processes such as epitaxial growth are possible.
How is sputter coating used in scanning electron microscopy?
Sputter coating in scanning electron microscopy is a sputter deposition process to cover a specimen with a thin layer of conducting material, typically a metal, such as a gold / palladium (Au/Pd) alloy. A conductive coating is needed to prevent charging of a specimen with an electron beam in conventional SEM mode (high vacuum,…
