Quartz Furnace Tube
Oversized Quartz Tube
Quartz Boat
Quartz Plate
Quartz Lamp Holder
Quartz Rod
Quartz Ring
Customized Quartz Products
Plasma-Fused Quartz Ingots
Quartz Irregular Shaped Sheets
Quartz Crystal Singing Pyramid
Half-white Coated Short-wave Infrared Quartz Heating Lamp
Company Profile
Southeast Quartz (Lianyungang)
Established in 2015, Lianyungang Southeast Quartz Products Co., Ltd. is located in Donghai County, Lianyungang City, Jiangsu Province—celebrated globally as a national base for the silicon material industry. As a premier professional manufacturer integrating R&D, design, production, sales, and import & export trade, we rely on the superior, high-quality quartz ore resources in Donghai County to supply the global high-tech sectors.
We deeply engage in the deep processing of quartz glass, positioning ourselves as a core supplier of quartz consumables for photovoltaic (PV), semiconductor, laboratory, chemical, lighting, and other high-precision industries. With mature production technology, a strict quality control system, and complete customized services, we guarantee high-efficiency components that withstand the most rigorous industrial environments.
High-Purity Quartz Boats: The Semiconductor & PV Standard
High-purity quartz boats are crucial holding vessels used during high-temperature thermal processing, diffusion, and oxidation of silicon wafers in the semiconductor and solar cell manufacturing industries.
Semiconductor Wafer Processing
In semiconductor wafer fabrication, quartz boats support wafers during LPCVD, PECVD, and oxidation processes. High purity is essential to prevent heavy metal contamination that can degrade device performance and yield.
Solar & PV Cell Diffusion
Photovoltaic cells require consistent dopant diffusion (such as phosphorus or boron). Our quartz boats ensure uniform spacing and thermal consistency, promoting optimal light-to-electricity conversion efficiency.
Extreme Thermal Stability
Fused silica has a very low coefficient of thermal expansion, meaning quartz boats can withstand rapid temperature changes and continuous operating environments up to 1200°C without structural deformation.
Technical Performance & Specifications
Our quartz boats are manufactured using premium fused silica raw materials, offering outstanding chemical resistance, minimal trace impurities, and high dimensional accuracy.
| Property / Parameter | Fused Silica Quartz Value | Industrial Applications & Benefits |
|---|---|---|
| SiO2 Purity | ≥ 99.99% (High-Purity Grade) | Prevents metal ion diffusion into silicon wafers during high-temp runs. |
| Continuous Working Temp | Up to 1100°C - 1200°C | Ideal for oxidation, diffusion, annealing, and LPCVD processes. |
| Coefficient of Thermal Expansion | 5.5 × 10⁻⁷ / °C (20°C - 320°C) | Extremely low; prevents breakage during rapid heating or cooling cycles. |
| Chemical Resistance | Excellent against acids (except Hydrofluoric) | Allows standard acid-washing procedures for reuse without degradation. |
| Customization Capabilities | Horizontal, Vertical, Slotted, Ladder-type | Engineered to fit specific semiconductor furnaces and automatic loaders. |
High-Purity Quartz Consumables Showcase
We offer a comprehensive range of premium quartz products tailored for laboratory research and high-volume industrial manufacturing.
Premium Quartz Boat for High Temperature Processes
Specially designed for wafer carriers in diffusion furnaces. Features precise slotting and robust structural integrity.
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Custom Size Quartz Furnace Tube for Lab & Industry
High-purity fused silica furnace tubes with customization options for lengths, diameters, and flange configurations.
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Oversized Fused Quartz Tube for High Temp Applications
Large diameter tubes designed for heavy-duty industrial processing, featuring superior thermal shock resistance.
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Quartz Bell Jar with Excellent Thermal Stability
Designed for vacuum deposition chambers and high-temperature gas reactors. Excellent optical clarity and durability.
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Introduction to Plasma-Fused Quartz Ingots
Raw material blocks processed through high-temperature plasma fusion, providing a highly dense and bubble-free structure.
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High Purity Quartz Rod / Fused Silica Rod
High-transmittance rods for semiconductor fiber guides, lab stirs, and structural components in heating chambers.
View Product DetailsPrecision Manufacturing & Quality Control
At Southeast Quartz, we combine raw material advantages with sophisticated engineering processes to deliver flawless quartz glass components.
Customer Supreme
Adhering to the philosophy of "Quality First, Customer Supreme, Innovation-Driven, Integrity Management", the company has established a complete quality inspection system.
Quality Control
All products undergo multiple tests such as helium mass spectrometry leak detection, pressure resistance test and purity test before leaving the factory to ensure stable performance, no impurities and no leakage.
Customized Services
Meanwhile, the company provides flexible customized services, and can customize product sizes, structures and specifications according to customers' equipment parameters and process requirements, quickly responding to personalized orders.
Factory Images & Processing Center
Take a virtual tour of Lianyungang Southeast Quartz's manufacturing facility. We maintain standardized production workshops and strict dust-free packaging setups.
Production & Processing Display
Factory & Facilities Display
General Factory & Team Environment
International Quality Certifications
Our commitment to manufacturing excellence is backed by global verification standards. Our quartz boats and materials comply with REACH, RoHS, and SGS standards to ensure they are safe for high-end semiconductor cleanrooms.
ISO 9001 Quality System
REACH Compliant
RoHS Certified
SGS Tested
Third-Party Test Report
Trusted by Customers Worldwide
Quality • Service • Global Presence
With reliable product quality, efficient delivery capacity, and thoughtful after-sales service, the products of Lianyungang Southeast Quartz Products Co., Ltd. not only cover all provinces and cities in China, but are also exported to many countries and regions in Europe, America, Southeast Asia, the Middle East, and beyond, winning wide recognition and trust from customers at home and abroad.
Innovation and Research
In the future, the company will continue to deeply cultivate the field of quartz products, continuously improve technological innovation and production technology levels, and strive to provide global customers with higher-quality and more professional quartz product solutions, contributing to the high-quality development of high-end manufacturing and scientific research fields.
Deep Dive: Fused Silica Quartz Boats in Thermal Processing
Modern industrial wafer processing demands exceptional material purity. In high-temperature furnaces, impurities like copper, sodium, and iron can easily migrate into the silicon substrate, ruining semiconductor device performance. This is why high-purity quartz boats from China have become the global standard. Fused silica boasts a purity level exceeding 99.99% SiO2, meaning it introduces virtually zero contaminants during diffusion, annealing, or LPCVD.
Types of Quartz Boats
Depending on the wafer loading orientation of your furnace, quartz boats are engineered in two main styles:
- Horizontal Quartz Boats: Typically used in traditional horizontal diffusion furnaces. Wafers stand vertically in horizontal slots, allowing uniform gas flow across the wafer surfaces.
- Vertical Quartz Boats: Designed for modern vertical furnaces. Wafers lie horizontally on slotted ladder rungs. This configuration is ideal for automated robotic loading systems and reduces footprint in cleanrooms.
Maintenance and Care
To extend the lifespan of high-purity quartz boats, proper cleaning and handling protocols must be observed:
- Acid Etching: Clean quartz boats periodically using a diluted Hydrofluoric (HF) acid solution to remove accumulated process films or contaminants, followed by rinsing with ultra-pure deionized water.
- Thermal Stress Management: Although quartz has excellent thermal shock resistance, limiting rapid thermal cycling from high temperatures (e.g., above 1000°C) to room temperature prevents micro-cracking and devitrification.
Contact Us & Stay Connected
Get in touch with China's leading high-purity quartz boat manufacturer today. Our engineering team is ready to assist with custom designs and material specifications.
Southeast Quartz Headquarters
+86 135-8528-6180
+86 138-5128-2778
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