What's Tungsten Wire Evaporation Basket?
Tungsten wire evaporation basket, alternatively referred to as tungsten basket or basket-shaped tungsten heater, is a resistance-based vacuum evaporation heating element manufactured by winding high-purity tungsten wires into a basket-shaped heating zone. It is primarily used in vacuum evaporation coating equipment to heat, melt, and vaporize metal deposition materials.
Tungsten wire evaporation basket uses high-purity tungsten wire exceeding 99.95% purity or potassium-doped tungsten wire (to enhance non-sag performance and extend continuous service life) as raw materials. Multiple fine wires are stranded, and wound into conical, cylindrical, or basket-like structures. The unique geometric design provides a concentrated containment space for bulk deposition materials such as granules, chips, and pellets, overcoming the physical limitations of linear elements that cannot hold loose solid materials.
With a melting point of approximately 3,422°C, tungsten maintains exceptional structural stability and creep resistance at elevated temperatures. Its low vapor pressure properties minimize the risk of heat source volatilization contaminating the deposition layers, thereby improving film quality and process stability.
To match specific evaporation power and material loading demands, tungsten baskets utilize wire diameters from 0.2 mm to 1.5 mm in single-wire or stranded multi-wire configurations. Stranded multi-wire structures enhance overall mechanical strength while utilizing capillary action within wire gaps to retain molten metal. This minimizes liquid metal dripping during vaporization, improving deposition stability and material utilization.
Thermal fields, deposition rates, and coating uniformity are functions of basket sizing, winding density, and heating length. Deeper basket profiles are ideal for high-load continuous operations, while compact, fine-wire designs are tailored for precision, low-power film deposition systems.
Featuring rapid heating rates and low thermal inertia, tungsten wire evaporation basket delivers the highly stable thermal output required for precision coating processes. It is widely applied in lead electrode fabrication for semiconductor microelectronic devices, anti-reflective film deposition for precision optical lenses, aluminum vacuum deposition for automotive lamp reflectors, and surface metallization for plastic and hardware components.
Leveraging over three decades of precision manufacturing expertise in tungsten heater, CTIA GROUP delivers optimized, custom-engineered designs tailored to specific evaporation materials, equipment configurations, and thermal fields. Through the precise adjustment of wire specifications, basket geometries, winding methods, effective heating zones, and lead-out structures, integrated with advanced forming and surface treatment processes, the resulting tungsten wire evaporation basket solutions provide exceptional stability and reliability for premium vacuum coating systems.
For any inquiry, please contact tungsten heater manufacturer: CTIA GROUP
Email: sales@chinatungsten.com
Tel: 0086 592 5129696 / 0086 592 5129595
Website: www.tungsten.com.cn
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