Overview
Titanium Tungsten (TiW) sputtering targets are specialized materials used in physical vapor deposition (PVD) processes to create thin, uniform coatings on substrates. These targets are composed of an alloy of titanium and tungsten, often in ratios such as 70:30 or 80:20, depending on the desired properties. The combination of titanium's lightweight and tungsten's high density and durability makes TiW targets ideal for applications requiring precise and durable thin films. TiW sputtering targets are widely used in the semiconductor industry, where they serve as barrier layers to prevent diffusion between copper interconnects and silicon substrates. Their excellent conductivity and resistance to electromigration make them indispensable in advanced electronic devices. Additionally, their thermal stability ensures consistent performance under high-temperature conditions.
Physical and Chemical Properties
Titanium Tungsten sputtering targets exhibit a unique blend of properties derived from their constituent metals. The density of TiW alloys typically ranges from 12 to 14 g/cm³, depending on the tungsten content. These targets are known for their high melting points, often exceeding 1600°C, which makes them suitable for high-temperature deposition processes. Chemically, TiW alloys are inert and resistant to oxidation, though they should still be stored in dry, inert environments to maintain purity. Their mechanical properties include high hardness and wear resistance, which contribute to their longevity in sputtering applications. The electrical conductivity of TiW is another critical property, as it ensures efficient electron flow in semiconductor devices.
Main Applications
The primary application of Titanium Tungsten sputtering targets is in the semiconductor industry, where they are used to deposit thin films as diffusion barriers in integrated circuits. These barriers prevent copper from migrating into silicon, which could degrade device performance. TiW films are also used in memory devices and microelectromechanical systems (MEMS). Beyond semiconductors, TiW targets are employed in the production of solar cells, where they enhance conductivity and durability. In the optical industry, they are used to create reflective and anti-reflective coatings. The versatility of TiW sputtering targets makes them valuable in any application requiring precise, high-performance thin films.
Safety and Storage
While Titanium Tungsten sputtering targets are generally safe to handle, proper precautions should be taken to avoid contamination and ensure worker safety. Always use gloves when handling targets to prevent oils or moisture from affecting their performance. Store targets in sealed containers with desiccants or under inert gas to minimize oxidation. During sputtering, ensure the deposition chamber is well-ventilated to avoid inhalation of fine particles. Although TiW alloys are not highly toxic, prolonged exposure to dust or fumes should be avoided. Regular maintenance of sputtering equipment is also recommended to prevent buildup of residual materials.
B2B Procurement Guide
When procuring Titanium Tungsten sputtering targets, it is essential to specify the alloy composition (e.g., Ti:W 70:30), purity level (typically 99.9% or higher), and target dimensions. Custom shapes and sizes are often available, so provide detailed technical drawings if required. Quality assurance is critical; request certificates of analysis (CoA) and material test reports (MTRs) to verify composition and purity. Lead times can vary, especially for custom orders, so plan procurement accordingly. For reference, prices range from $500 to $2000 per kg, depending on specifications. Consider suppliers with a proven track record in high-purity materials and ask for samples to evaluate performance before large-scale purchases.
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