High Purity Tungsten Boats

Overview

High Purity Tungsten Boats, with their high melting point, exceptional purity, outstanding electrical and thermal conductivity, and resistance to high temperatures and corrosion, have become indispensable components in vacuum coating and high-temperature processes. They find extensive application across multiple industries, including electronics, defence, decorative finishes, semiconductors, and materials preparation.

Pure Tungsten Boats Specification

Properties of Tungsten

1. High melting point (3410°C), resistant to high-temperature oxidation;

2. High density, with a dense structure;

3. Strong chemical stability, resistant to strong acids and alkalis (except hydrofluoric acid); 4. Excellent thermal and electrical conductivity, with a low coefficient of thermal expansion;

5. Compared to tantalum boats, tungsten boats offer lower cost and higher mechanical strength, representing a balanced choice between cost-effectiveness and performance;

6. High purity (typically 99.95%-99.99%), with extremely low impurity content, suitable for high-end applications such as semiconductors and aerospace.

1. High evaporation efficiency: Suitable for vacuum evaporation coating of metal/alloy materials;

2. Excellent formability: Customisable to various dimensions, thicknesses, and shapes;

3. Extended service life: Reusable hundreds of times under normal operating conditions;

4. Strong compatibility: Compatible with mainstream industrial equipment, including vacuum coating machines and electron beam evaporation systems;

5. Environmentally friendly and non-toxic: Contains no volatile harmful substances and complies with industrial environmental standards.

Tungsten Boat Video

High Purity Tungsten Boats Application

1. Vacuum Deposition

• Within a vacuum environment, an electric current passes through a tungsten boat for evaporation, heating it to below 2000°C. This process heats and evaporates low-melting-point metals (such as aluminium, gold, or silver) placed within a recess. The resulting metal vapour condenses onto the substrate surface, forming a uniform thin film.
• Tungsten boats are employed for display coatings, reflective layers on precision optical lenses, ultra-wear-resistant decorative films on ornaments, vacuum-deposited packaging materials, and metallisation coatings for capacitors.

2. High-Temperature Processing

• Tungsten boat thermal evaporation facilitates the sintering and high-temperature annealing of refractory metals, as well as the fabrication of high-temperature components such as rocket engines, nozzles, and spacecraft radiators.

3. Semiconductor Industry

• Tungsten boats for evaporation are employed in semiconductor wafer manufacturing processes, including chemical vapour deposition (CVD) and physical vapour deposition (PVD). This prevents impurity contamination of silicon wafers, ensuring stable electrical performance of semiconductor devices.

4. Scientific Research

• Employed as sample boats in atomic absorption spectrometers and for thermal evaporation preparation of novel laboratory materials (e.g., superconducting films), ensuring reproducibility and accuracy in research experimental data.

Type of Tungsten Evaporation Boat

I. By Shape and Structure

• V-shaped: Features a V-shaped cross-section with a narrow base, offering excellent flow guidance and uniform evaporation. This is the standard model for vacuum coating, suitable for small to medium-sized evaporation materials.
• U-Shaped (Round-Bottom): Features a curved base for increased volume and enhanced stability, suitable for batch evaporation of larger quantities of material or high-melting-point metals.
• Butterfly-Shaped (Wing-Shaped): Features upward-curving sides forming a 'wing-like' profile, providing a larger evaporation area and superior coating uniformity, ideal for coating large-area substrates.
• Flat-bottomed: Features a level base for optimal placement stability, primarily used for large substrates or processes demanding high positioning accuracy.
• Stepped: Incorporates a stepped structure between the clamping area and main body, with folded edges providing secure equipment fixation while preventing material spillage and enhancing structural rigidity.
• Custom Shapes: Designed according to client equipment and process requirements (e.g., grooves, protrusions, special dimensions), suitable for niche or precision applications.

II. By Manufacturing Process

• Stamped Type: Formed via high-temperature stamping, offering high production efficiency and low cost, suitable for standardised batch supply.
• Folded Type: Manufactured by bending tungsten sheets, providing flexible structures that can rapidly adapt to specialised dimensional requirements.
• Welded/Riveted Type: Constructed by assembling multiple tungsten sheets through welding or riveting, enabling complex shapes but involving higher process costs.

High Purity Tungsten Boats Pictures

Other Evaporation Sources

Evaporation sources are containers or structures (e.g., boats, filaments, crucibles, baskets) that hold materials (metals, ceramics, organics) for thermal evaporation in thin-film deposition. Heated, the solid material turns to vapour, coating a substrate. Common materials include tungsten, tantalum, and graphite, chosen for their high purity and suitable vapour pressure to create uniform films for electronics and optics.

Tungsten Boat Crucible

Titanium Crucible

Tungsten Filaments

Related News

High Purity Tungsten Boats, Tungsten Boats For Evaporation To Spain

We have completed an order for Tungsten Boats with our Spanish client, providing a bespoke solution tailored to their specifications regarding dimensions and form. Throughout production, we rigorously adhered to international quality management system standards, meticulously overseeing every stage from raw material selection to each manufacturing process, culminating in stringent testing of the finished products. This ensures each item delivers exceptional quality and reliable performance. This collaboration not only fulfilled their current project requirements but also laid a solid foundation for further cooperation between our two parties in the future.

Product Qualification

Hot Tags: high purity tungsten boats, suppliers, manufacturers, factory, customized, wholesale, price, quotation, for sale, Cobalt Alloy 6K Rayon Fiber Cutter Blade, Tungsten Stud Kits, Tungsten TIG Welding Rods, Zirconium Metal Sputter Target, Zirconium Z702 Sputter Target, Zr Sputtering Target