Vanadium (V) is a refractory metal with excellent physical properties and chemical stability, possessing a high melting point, good electrical conductivity, a low coefficient of thermal expansion, and good corrosion resistance. With the development of vacuum coating technology, physical vapor deposition (PVD) technology, and continuous coating equipment, vanadium tubes have gradually become one of the important materials in rotary tube targets.
Vanadium tube targets are mainly used in magnetron sputtering, achieving continuous and uniform coating through high-speed rotation, making them particularly suitable for large-area, high-efficiency industrial thin film production. Vanadium tube targets are tubular sputtering targets manufactured from high-purity vanadium metal and are typically used in rotating cathode magnetron sputtering systems. Compared to traditional planar targets, tube targets offer higher material utilization and a longer service life. During magnetron sputtering: high-energy ions (usually Ar⁺) bombard the vanadium target surface, causing vanadium atoms to sputter from the target surface and deposit onto the substrate surface, forming a vanadium thin film with special properties. Vanadium targets typically require: high purity; low gas content; uniform grain structure; good machinability; and stable sputtering performance.
Excellent Sputtering Performance: Vanadium, being a body-centered cubic metal, possesses excellent sputtering characteristics. During magnetron sputtering, vanadium can create: a stable plasma environment; uniform atom release; and a stable deposition rate. Compared to some materials prone to particulate contamination, high-purity vanadium targets provide more stable film quality.
Good Electrical Conductivity: Magnetron sputtering requires targets with good electrical conductivity. Vanadium has low resistivity, which can effectively conduct current during sputtering. Good conductivity helps to: improve discharge stability; reduce abnormal discharge; and improve coating efficiency. Therefore, vanadium is suitable for DC magnetron sputtering and pulsed DC sputtering. High Melting Point and Good Thermal Stability: Vanadium's melting point is approximately 1910℃. During high-speed sputtering, the target surface is subjected to: high-energy ion bombardment; localized high temperatures; and thermal cycling. Vanadium possesses good heat resistance, maintaining structural stability and reducing: target deformation, hot cracking, and reduced service life.
Vanadium exhibits excellent chemical stability and corrosion resistance. In vacuum coating environments, it can resist: plasma environments, inert gas impacts, and high-energy particle effects. Therefore, it can ensure long-term stable sputtering.
The advantages of vanadium tube targets in magnetron sputtering include: higher material utilization. Traditional planar targets typically have an effective utilization rate of only about 30%. Rotating tube targets, due to their cylindrical structure and 360° rotating sputtering, result in more uniform material consumption. Vanadium tube target material utilization can be significantly improved, typically reaching over 80% (depending on equipment design and target structure). This is crucial for expensive high-purity metal materials.
Longer continuous operating time. Rotating tube targets offer a larger effective sputtering area. In continuous production processes: fewer target changes are needed; downtime is reduced; and production efficiency is increased. Particularly suitable for: large-size glass coating; solar cell production; and industrial decorative coating.
