Tungsten metal

Tungsten sputtering target is a kind of tungsten metal, in a high vacuum environment by the ion beam stream bombardment, the surface atoms will be sputtered out and deposited on the surface of the substrate, so as to form a thin film of the key materials, widely used in semiconductors, solar energy, flat-panel displays, and so on many high-tech fields.

VIMATERIAL offers high-purity tungsten sputtering targets, and can customize different sizes to meet your needs. Contact us for more information.

Characteristics

Appearance and colour: Grey

Atomic weight: 183.85.

Melting point: 3410℃ (6192℉).

Thermal Conductivity: 174W/m·K

Coefficient of thermal expansion: 4.5×10-⁶/K.

Theoretical density: 19.25g/cm³.

Purity: Usually 99.95% and above.

Key Advantages of Tungsten Sputtering Targets

Excellent high-temperature stability: Tungsten remains structurally stable at high temperatures and is suitable for demanding sputtering environments.

Good thermal conductivity: It efficiently transfers heat, helping maintain temperature uniformity and process stability during sputtering.

Low thermal expansion: Tungsten shows minimal dimensional change under temperature variation, ensuring high precision and coating consistency.

Stable electrical conductivity: Its low resistance supports smooth current flow and stable plasma formation, improving sputtering efficiency.

High purity benefits film quality; High-purity tungsten reduces impurity effects, resulting in more stable deposition and better film uniformity and performance.

Strong mechanical properties； It has high hardness and strength with good wear and deformation resistance, enabling long service life.

Good sputtering performance and film quality： Tungsten provides stable sputtering behavior, producing dense, uniform films with good adhesion and overall properties.

Applications of Tungsten Sputtering Targets

Semiconductor Field

Tungsten sputtering targets are used to form electrodes and interconnects in chips due to their good conductivity and high thermal stability. They also serve as diffusion barrier layers, preventing material intermixing and improving device reliability. In addition, tungsten is widely used for tungsten plug (W-plug) filling to achieve vertical electrical connections in highly integrated circuits.

Flat Panel Display Field

Tungsten is used in thin-film transistor (TFT) electrodes, helping improve display performance, stability, and response speed. It can also be used to form functional oxide films for transparent conductive layers in display and touch panel applications.

Solar Energy Field

Tungsten is applied in solar cell electrodes to improve conductivity, stability, and overall efficiency. It can also be used in anti-reflective coatings to enhance light absorption and reduce optical losses.

Optical Field

Tungsten thin films are used in optical coatings such as reflective, filtering, and protective layers. It is also applied in infrared optical components like windows and lenses due to its favorable infrared optical properties.

Aerospace Field

Tungsten coatings are used on high-temperature components such as engine parts to improve heat, wear, and corrosion resistance. It is also used in satellite components for wiring, electrodes, and thermal control coatings to ensure reliability in space environments.

Other Fields

In medical applications, tungsten is used in X-ray and CT equipment due to its strong radiation absorption. In machining, tungsten coatings enhance tool hardness, wear resistance, and service life.

Packaging and Storage conditions

Tungsten sputtering targets are typically packaged in clean, dry, and sealed vacuum or moisture-proof materials to prevent contamination and oxidation. Protective cushioning is used to avoid mechanical damage such as scratches, dents, or edge chipping during transportation and handling.

They should be stored in a dry, clean, and well-ventilated environment, away from humidity, corrosive substances, and direct contact with reactive chemicals.

FAQs

Q1: What is a tungsten target material?

A: A tungsten target material is a high-purity tungsten solid used as a source material in sputtering processes. Under ion bombardment, atoms from the tungsten target are ejected and deposited onto a substrate to form thin films. It is widely used in semiconductor, display, solar, optical, and aerospace applications due to its excellent thermal, electrical, and mechanical properties.

Q2: Can you sputter tungsten?

A: Yes, tungsten can be sputtered using physical vapor deposition (PVD) techniques such as magnetron sputtering. Although tungsten has a high melting point and strong atomic bonding, it can still be effectively deposited into thin films under appropriate sputtering power and process conditions.

Q3: What is the sputtering yield of tungsten?

A: The sputtering yield of tungsten is relatively low compared to many other metals. This means fewer tungsten atoms are ejected per incoming ion, which is mainly due to its high atomic mass and strong atomic bonding. The exact yield depends on process parameters such as ion energy, working gas, pressure, and target conditions.