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 Southeast Quartz Products Co., Ltd., established in 2015, is strategically located in Donghai County, Lianyungang City, Jiangsu Province—a globally recognized national base for the silicon material industry. As a pioneer in high-purity quartz engineering, we integrate advanced research and development, custom engineering, precision manufacturing, and comprehensive import/export services under one roof.
By leveraging the superior raw quartz ore reserves of Donghai County, we specialize in the deep processing of high-purity quartz glass. Today, we stand as a core supplier of critical quartz consumables for the semiconductor fabrication, photovoltaic (PV) solar cell production, laboratory research, chemical processing, and specialty lighting industries. Our mature manufacturing technologies, ultra-strict quality control systems, and flexible customization services ensure your processes operate without interruption.
High-Purity Process Components & Engineering
Semiconductor manufacturing demands ultra-clean environments and components that can withstand extreme thermal and chemical stress. Our high-purity fused quartz products are designed to deliver exceptional performance across demanding thermal and plasma processing steps.
Extreme Temperature Resistance
Our products are manufactured from premium fused quartz, allowing them to withstand continuous operating temperatures up to 1200°C, and short-term exposure up to 1450°C. Perfect for diffusion and LPCVD processes.
Thermal Shock Stability
Featuring an extremely low coefficient of thermal expansion, our quartz bell jars and furnace tubes exhibit superior resistance to rapid temperature fluctuations, minimizing thermal stress fractures.
Corrosion & Chemical Inertness
Excellent chemical resistance against acids, halogens, and organic solvents. Fused quartz remains highly stable under aggressive chemical environments, preventing batch contamination.
Featured Semiconductor Quartz Products
Explore our comprehensive range of high-purity quartz consumables engineered to meet the strict tolerances of modern wafer fabrication processes.
Quartz Bell Jar with Excellent Thermal Stability
Designed for high-vacuum, high-temperature deposition and etching processes, providing a secure, contamination-free processing chamber.
Plasma-Fused Quartz Ingots
Premium raw material blocks processed via plasma fusion, guaranteeing ultra-low bubble content and extreme homogeneity.
Oversized Fused Quartz Tube for High Temp Applications
Large-diameter quartz tubing engineered for vertical furnace processes, offering uniform wall thickness and thermal resilience.
Custom Size Quartz Furnace Tube
Tailored to exact lab or industrial furnace specifications, featuring precision ground joints and gas inlet/outlet ports.
Premium Quartz Boat for High Temp Processes
Precision-slotted quartz boats designed to securely hold silicon wafers during high-temperature diffusion and oxidation runs.
Fused Silica Quartz Plate – Heat Resistant
High-transmission quartz plates designed for optical windows, semiconductor substrates, and thermal shields.
High Purity Quartz Rod / Fused Silica Rod
Durable, high-purity rods ideal for structural supports, fiber preforms, and custom semiconductor furnace internal components.
Custom Transparent Quartz Glass Ring
High-temperature insulation rings engineered to withstand aggressive plasma etching and CVD thermal gradients.
Customized Quartz Instruments & Labware
Tailor-made quartz beakers, flasks, and complex multi-acid purification systems built precisely to your CAD blueprints.
Why Semiconductor Processes Require Fused Quartz Bell Jars
In wafer fabrication, processes like Chemical Vapor Deposition (CVD), Epitaxy, and plasma etching occur under extreme environments. The selection of chamber materials directly impacts wafer yield and device performance. High-purity fused quartz bell jars serve as the primary containment vessel, shielding the wafer from external contaminants while maintaining a stable vacuum environment.
Our quartz bell jars are manufactured using high-purity natural silica sand sourced from Donghai County. The raw material undergoes strict sorting and chemical purification to reduce total metallic impurities to less than 10 ppm. This extremely low level of trace metal contamination (such as Sodium, Potassium, Iron, and Copper) is essential to prevent mobile ion contamination in silicon wafers, which can lead to device failure.
Comparison of Fused Quartz Properties
| Property | Fused Quartz (Southeast Quartz) | Standard Borosilicate Glass | Alumina Ceramic (Al2O3) |
|---|---|---|---|
| SiO2 Purity | > 99.99% | ~ 81% | N/A (Alumina) |
| Max Working Temp | Up to 1200℃ | ~ 500℃ | Up to 1600℃ |
| Thermal Expansion Coeff. | 5.5 x 10-7 / ℃ (Extremely Low) | 33 x 10-7 / ℃ | 80 x 10-7 / ℃ |
| Chemical Resistance | Excellent (Except HF & H3PO4 at high temp) | Moderate | Good |
| Thermal Shock Resistance | Excellent (Can be quenched from 1000℃ to water) | Poor | Moderate |
Custom Fabrication Capabilities
Every semiconductor fabrication line has distinct equipment configurations. Lianyungang Southeast Quartz Products Co., Ltd. offers comprehensive custom engineering services. We can produce quartz bell jars with customized heights, diameters, flange profiles, gas inlet nozzles, and optical windows. Using advanced CNC grinding machines and manual glassblowing by experienced technicians, we achieve dimensional tolerances within ±0.1mm.
State-of-the-Art Processing & Manufacturing
A visual walkthrough of our advanced quartz manufacturing facility. From raw material cutting to manual and automated glass refining, we ensure every piece meets global standards.
Product Processing Display
Factory Workshop & Equipment
Global Quartz Excellence
Quality is the foundation of our business. Our multi-tiered quality control structure guarantees defect-free quartz components ready for cleanroom deployment.
Customer Supreme
Adhering to the core philosophy of "Quality First, Customer Supreme, Innovation-Driven, and Integrity Management," we prioritize the unique specifications of each wafer fab and research facility we serve.
Quality Control
All products undergo multiple tests such as helium mass spectrometry leak detection, pressure resistance tests, and purity tests before leaving the factory to ensure stable performance, no impurities, and zero leakage.
Customized Services
We provide flexible customized services, tailoring product dimensions, flange types, and port configurations to match specific equipment parameters. Our engineering team quickly responds to complex, low-volume orders.
Production Facilities & Warehouse
Certificate Display
Our manufacturing processes are certified to meet international standards for quality management, environmental safety, and material purity.
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, and the Middle East. We have won wide recognition and trust from customers at home and abroad.
Innovation and Research
In the future, our 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.
Technical FAQ: Semiconductor Quartz Bell Jars
Get answers to common technical queries regarding the application, maintenance, and specification of quartz bell jars in high-purity processing environments.
Q1: Why is fused quartz preferred over standard glass in semiconductor manufacturing?
Fused quartz is composed of almost pure silica (SiO2 > 99.99%). Unlike borosilicate glass, it contains virtually no metallic impurities like boron, sodium, or calcium. In high-temperature semiconductor processing, standard glass would melt and release impurities that destroy the electrical properties of silicon wafers. Fused quartz maintains structural integrity up to 1200°C and provides an ultra-clean environment.
Q2: How do you ensure the vacuum integrity of your quartz bell jars?
All our quartz bell jars undergo rigorous helium mass spectrometry leak detection. Fused quartz is impermeable to most gases, but micro-fissures or weld defects can cause vacuum loss. By introducing helium under pressure and using high-sensitivity detectors, we verify that every bell jar maintains a leak-tight seal, ensuring stable vacuum environments down to high-vacuum ranges.
Q3: Can your quartz products be customized to fit existing OEM tools?
Yes. We specialize in custom fabrication. We can manufacture quartz bell jars, furnace tubes, and boats to fit tools from major OEMs. Customers only need to provide technical drawings, CAD files, or physical samples. We customize flanges, gas inlets, exhaust ports, and thermocouple wells to match your specific hardware configuration.
Q4: How should quartz bell jars be cleaned and maintained in a wafer fab?
Quartz components should be cleaned using diluted hydrofluoric acid (HF) or a mixture of HF and nitric acid (HNO3) to remove process deposits and metallic contaminants. After acid washing, they must be thoroughly rinsed with deionized (DI) water and dried in a clean, dust-free environment. Proper handling with cleanroom gloves is essential to prevent fingerprint contamination, which can cause devitrification at high temperatures.
Ready to Optimize Your Semiconductor Process?
Contact Lianyungang Southeast Quartz Products Co., Ltd. today to discuss your custom specifications, request drawings, or receive a competitive quote.