Description of High Purity Tungsten Boat For Evaporation
Tungsten boats are preferred for evaporation processes because tungsten has a very high melting point (over 3400°C), allowing it to withstand the high temperatures required for vaporizing many materials. Additionally, tungsten is relatively inert, meaning it won't react with most materials, being evaporated, ensuring purity in the thin film deposition process.
A tungsten boat is a common tool used in thin film deposition processes, particularly in physical vapor deposition (PVD) techniques such as thermal evaporation. It's essentially a boat-shaped container made of tungsten, a metal known for its high melting point and resistance to heat and corrosion.
Material purity and performance correlation of High Purity Tungsten Boat for Evaporation
Purity level and impurity control
Semiconductor grade (99.999%):
Key impurity limits: O < 5ppm, C < 3ppm, Fe < 1ppm (avoid film contamination).
Detection method: GDMS (glow discharge mass spectrometry) full element analysis.
Industrial grade (99.95%):
Allow trace Si (< 50ppm), suitable for non-precision coating.
Grain structure design
Large grains (> 100μm):
Excellent high temperature creep resistance (deformation rate < 0.1%/h at 1600℃), but high brittleness.
Fine grains (10-50μm):
Improved thermal shock resistance (thermal cycle number > 500 times, ΔT = 1000℃ → room temperature).
The whole process of manufacturing High Purity Tungsten Boat for Evaporation
high-purity tungsten boat for evaporation
Key steps of powder metallurgy
Raw material processing:
Tungsten powder reduction: H₂ reduction of WO₃ (two-stage: 600℃→900℃), control particle size 3-5μm.
Isostatic pressing:
200-300MPa molding, green density of 60-65%, boat wall thickness tolerance ±0.1mm.
High temperature sintering:
Vertical melting sintering (2200-2400℃), density＞19.0g/cm³ (theoretical value 99%).
Features of High Purity Tungsten Boat for Evaporation
Defect-free materials: Contamination during evaporation is minimized using high-purity tungsten.
Individual tailoring: Certain applications can be fitted to meet specified dimensions.
Uniform temperature distribution: The substrate is evenly heated, facilitating uniform deposition.
Permanent construction: Maintains integrity while enduring elevated temperatures and repeated cycles of thermal stress.
Reliable efficacy: Consistent output in both research and development, or more publicly available products usage.
Excellent corrosion resistance: Most acids and alkalis are effectively neutralized.
High evaporation efficiency: Material evaporation is made constant with junk-free heating.
Thermal stability: Endures constitutive alterations of volatile environments.
Long serviceable life: Exceptional resistance to wear extends equipment life.
Applications of High Purity Tungsten Boat For Evaporation
Thin Film Deposition: Used for depositing thin films in semiconductor manufacturing.
Optical Coatings: Ensures high optical transmittance.
R&D: Supports advancements in materials science.
Solar Cells: Help improve energy conversion efficiency.
Vacuum Evaporation: Used to heat and evaporate materials in a vacuum environment.
Metallurgical Processes: Applied in refining metals and materials requiring high-temperature treatment.
Electronics Manufacturing: Used in producing electronic components like solar cells, LEDs, and flat-panel displays.
Aerospace & Defense: Applied in high-performance optical and thermal barrier coating technologies.
Specifications of High Purity Tungsten Boat For Evaporation
|
Symbol of products |
Size(mm) |
Trough Length (mm) |
Trough Depth (mm) |
|
210 |
0.2*10*100 |
50 |
2 |
|
215 |
0.2*15*100 |
50 |
7 |
|
216 |
0.2*25*118 |
80 |
10 |
|
308 |
0.3*8*100 |
50 |
2 |
|
310 |
0.3*10*100 |
50 |
2 |
|
310 |
0.3*10*70 |
40 |
1.8 |
|
312 |
0.3*12*100 |
50 |
2 |
|
313 |
0.3*13*49 |
33 |
3.3 |
|
315 |
0.3*15*100 |
50 |
7 |
|
316 |
0.3*16*100 |
50 |
4 |
|
318 |
0.3*18*100 |
40 |
3.5 |
|
514 |
0.5*14*100 |
50 |
2.6 |
|
515 |
0.5*15*100 |
50 |
2.6 |
Quality Control Testing Of The Material
FAQ for High Purity Tungsten Boat For Evaporation
Are you a factory or a manufacturer?
A: Yes, we are a factory, but we generally use our trading company to handle the business abroad. It will be more convenient to receive the remittance and arrange the shipment.
What is the delivery method?
A: Generally, we send cargo by UPS, DHL, or FedEx. Also, we can send by sea to a seaport or by air to the closest airport.
Why is your product so cost-effective?
A: We cut out the middlemen in the end-to-end manufacturing process, and we obtain raw material directly from its source.
Do you do spot quality inspection or full inspection?
A: 100% full inspection for sure. All unqualified products are discarded.
How do you ensure your lead time?
A: From material preparation to machining and finally to a full inspection. Every stage of production is strictly monitored and controlled to give you an accurate delivery time.
What is the MOQ of High Purity Tungsten Boat For Evaporation?
A: Depends on quantity; generally, no MOQ limit.
How to pay for it?
A: A bank transfer (T/T) will be acceptable.
What is the delivery time?
A: around 7-20 days, which depends on the quantity and production.
What kind of package is it?
A: Generally, we use a carton case or a plywood case with protective material inside to ensure the safety of the cargo.
What is the lead time?
A: From the order placed to cargo receiving will take around 10-25 days.
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