CTIA's Tungsten Heater in Thermal Evaporation
Tungsten heater is a resistive tungsten heating element designed for vacuum thermal evaporation processes to heat and vaporize coating materials such as aluminum, chromium, gold, and silver, forming thin films on substrate surfaces. The tungsten heating element is made of high-purity tungsten wire or doped tungsten wire through precision stranding, winding, pressing forming, and surface treatment processes.
High-vacuum evaporation conditions place strict demands on material performance, requiring tungsten heater to maintain stable operation during continuous thermal loading. CTIA’s tungsten heater has the following characteristics:
(1) High Temperature Resistance: With a melting point of about 3410℃, tungsten heater withstands the high temperatures required for material vaporization without melting or deformation.
(2) Low Contamination: Extremely low vapor pressure under high temperature and high vacuum conditions minimizes material evaporation from the heater, ensuring high film purity and optical performance.
(3) Good Wettability: Tungsten heater shows excellent wetting behavior with various metal materials, enabling uniform spreading of molten metals and stable evaporation rate with consistent film thickness.
(4) Structural Stability: Special annealing treatment improves creep resistance, maintaining structural integrity under repeated thermal shock and extending service life.
CTIA GROUP provides diverse specifications of tungsten heaters according to different vacuum deposition equipment structures and process requirements:
(1) Material: Pure tungsten wire, doped tungsten wire.
(2) Stranding Method: Single strand, 2-strand, 3-strand, 4-strand, or 6-strand structures.
(3) Wire Diameter: 0.2~1.2mm.
(4) Geometry: Hump (single peak, double peak), funnel (tungsten basket), coil, straight bar, U-frame, hook, and customized shapes.
Tungsten heater is widely used in metal thin film deposition, optical coating, semiconductor coating, and functional coating processes, enabling stable evaporation of aluminum, gold, and silver in vacuum environments.
CTIA GROUP has over 30 years of experience in tungsten heater manufacturing and provides system-level optimization design based on vacuum deposition equipment structure, evaporation material characteristics, and thermal field distribution requirements. Design parameters include tungsten wire diameter, doping type and content, structural configuration, effective heating length, and lead wire structure. Surface treatments such as electrolytic polishing and alkali cleaning are available to improve surface quality and operational stability, enabling full-process customization from material selection and structural design to precision manufacturing.
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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1.Tungsten heater quotation table
2. Catalog of tungsten heater
3. Tungsten heater models
4. Stranded tungsten wire for making tungsten heater