U Frame Tungsten Heater
1. What Is a U Frame Tungsten Heater?
A U frame tungsten heater is a metal evaporation source designed for vacuum evaporation coating processes. It is precision formed from high-purity tungsten wire into a structure resembling the door or the Greek letter “Π”.
2. Working Principle of U Frame Tungsten Heater
The working principle of a U frame tungsten heater is based on resistance heating and thermal conduction. In a vacuum environment, electric current passes through the tungsten wire, generating heat through electrical resistance. The operating temperature typically exceeds 2000°C. The generated heat is transferred by contact conduction to evaporation materials placed on the horizontal beam of the frame structure, such as aluminum wire or chromium wire, causing them to melt and further vaporize into metal vapor. These vapors travel in an approximately linear path under vacuum conditions and deposit onto the substrate surface to form metal thin films.
3. Advantages of U Frame Tungsten Heater
Compared with spiral tungsten heaters or wave type tungsten heaters, the U frame structure offers the following advantages:
(1) Stable Material Support: The heated crossbeam provides a support area that holds metal wires and reduces dripping after melting.
(2) Uniform Film Formation: Stable thermal field distribution and even vapor flow assist in maintaining consistent coating thickness.
(3) Long Service Life: Optimized stress distribution improves resistance to high-temperature creep and thermal shock, resulting in operational durability.
4. Applications of CTIA’s U Frame Tungsten Heater
U frame tungsten heaters are utilized in manufacturing sectors requiring large-area stable thermal fields within vacuum coating processes. U frame tungsten heaters have wide applications in:
(1) Automotive Component Manufacturing: Used for aluminum coating of automotive mirrors, lamp reflectors, and interior trim parts to provide reflectivity and uniform coatings.
(2) Display Panels and Optical Coating: Used for Liquid Crystal Display (LCD) and Organic Light-Emitting Diode (OLED) substrate heating and optical thin-film deposition.
(3) Precision Optical Components: Used for coating lenses, optical components, and backlight systems where film uniformity is required.
(4) Electron Beam Evaporation and Vacuum Evaporation Sources: Used as a heating element with electron beam evaporation or resistance evaporation systems to manage evaporation efficiency.
(5) Decorative and Functional Coating: Used for decorative coating and functional thin-film deposition on plastic and metal parts.
With over 30 years of expertise in tungsten heater manufacturing, CTIA delivers advanced engineering design and precision manufacturing solutions by systematically optimizing key structural parameters including tungsten wire diameter, strand count, frame height, leg spacing, frame width, overall length, and bending angle based on customer application scenarios, thermal zone requirements, and power specifications, while integrating surface treatments such as electrolytic polishing and chemical cleaning to provide end-to-end customized solutions that precisely align with actual operating conditions.
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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