High Purity Quartz Glass Products & Custom Fused Silica
FGQuartz manufactures a comprehensive portfolio of high-purity fused silica products for semiconductor, solar photovoltaic, optical, fiber-optic, laboratory and high-temperature applications. Our core product lines include quartz glass tubes, quartz rods, quartz plates, semiconductor wafer boats, crucibles for crystal growth, and fully custom fused silica components.
Whether you require standard material dimensions or highly complex geometries featuring CNC-machined grooves, threaded ports, precision bends, multi-section vacuum welds, or integrated multi-part assemblies, we execute every fabrication step under one roof — from initial prototype to scalable volume production. Explore our industry applications or review detailed technical specifications.
Complete Quartz Glass Product Portfolio
FGQuartz supplies a full spectrum of industrial and semiconductor-grade quartz glass products. All materials are engineered with high SiO₂ purity (≥ 99.99%), controlled dimensional tolerances, and high thermal resilience. Below is the complete product range with typical applications and customization options.
What they are: High-purity fused silica tubes used as process chambers, furnace tubes, diffusion tubes, CVD liners, substrate tubes and high-temperature conduits. Available from OD 5 mm to 1000 mm.
We manufacture:
• Standard & large-diameter quartz tubes
• Thick-wall and thin-wall tubing
• Flanged and threaded quartz tubes
• Tubes with side ports / gas manifolds
• Precision bent tubes
• Multi-section welded assemblies
• Tubes with domed or flat sealed ends
• Fully custom tube structures to CAD drawings
Primary applications: Semiconductor diffusion & LPCVD, solar diffusion, fiber-optic MCVD/OVD/VAD, laboratory reaction tubes, high-temperature furnace systems.
Key specifications: Outer diameter, inner diameter, wall thickness, length, concentricity, end configuration, surface finish.
Customization: Cutting, drilling, slotting, flange welding, bending, sealing, fire polishing, multi-section assembly.
Ideal for semiconductor, fiber optic and high-temperature applications.
What they are: Solid fused silica rods used for structural support, fiber preform starting material, laboratory stirring and precision fixtures. Diameters typically range from 3 mm to 300 mm.
We manufacture:
• Standard solid quartz rods
• Precision centerless-ground rods
• Custom diameter and length dimensions
• Rods integrated with CNC holes, grooves, or threads
• Special end-machining (chamfers, optical polish)
• Fully custom rod assemblies
Primary applications: Fiber-optic preform manufacturing, laboratory equipment, high-temperature structural supports, optical rod components.
Key specifications: Diameter, length, straightness, surface finish, end configuration.
Customization: Precision grinding, CNC features, end polishing, custom lengths.
Commonly used in fiber optics and laboratory environments.
What they are: Process-grade and optical-grade polished quartz plates and windows offering exceptional flatness and broad spectral transmission (JGS1 / JGS2 / JGS3). Ideal for vacuum viewports, optical substrates, and high-temperature observation.
We manufacture:
• Standard quartz plates and discs
• Precision optical windows
• Plates with CNC-drilled holes and slots
• Precision-machined stepped plates
• Custom geometric shapes
• Fully custom plate structures
Primary applications: Optical systems, laser windows, semiconductor process monitoring, laboratory spectroscopy, high-temperature viewports.
Key specifications: Length × width × thickness, flatness, parallelism, surface quality, optical grade.
Customization: Precision cutting, grinding, optical polishing, CNC machining of complex features.
Widely applied in optical and semiconductor systems.
What they are: High-precision quartz wafer boats for semiconductor oxidation, diffusion, and LPCVD furnaces. Engineered for 2–12 inch wafers with ultra-low particle generation, strict slot spacing, and uniform thermal dynamics.
We manufacture:
• Standard semiconductor wafer boats
• Photovoltaic (Solar PV) quartz boats
• Specialized wafer carriers
• Custom CNC slot profile designs
• Multi-piece complex boat structures
• Fully custom boat designs to OEM print
Primary applications: Semiconductor diffusion, oxidation, LPCVD; solar diffusion and annealing.
Key specifications: Wafer size, slot count and pitch, overall length/width/height, surface condition.
Customization: CNC slotting, custom geometry, multi-piece assemblies to OEM drawings.
Essential for semiconductor and solar PV diffusion processes.
What they are: Thermal-shock resistant quartz crucibles designed for CZ/MCZ silicon crystal pulling, demanding chemical analysis, and high-temperature powder calcination. Available across a range of capacities with extremely low elemental contamination.
We manufacture:
• Standard CZ / DS crystal pulling crucibles
• Custom capacity laboratory crucibles
• Specialized heavy-wall configurations
• Custom-shaped reaction crucibles
• Lidded and spouted crucible designs
Primary applications: Semiconductor and solar silicon crystal growth, laboratory calcination and chemical processing.
Key specifications: Diameter, height, wall thickness, shape, capacity, surface condition.
Customization: Custom dimensions and geometries to match specific pullers or experimental setups.
Critical for solar PV and semiconductor crystal growth, as well as laboratory use.
What they are: Custom quartz tanks and baths designed for high-temperature wet processing, semiconductor wet benches, and critical chemical laboratory equipment. Manufactured from premium fused silica for chemical inertness and leak-proof integrity.
We manufacture:
• Standard rectangular and cylindrical quartz tanks
• Custom volumetric tanks according to drawings
• Tanks with heavy-duty flanges, drains, and covers
• Overflow, cascade, and multi-chamber tank structures
• Fully integrated quartz tank assemblies
Primary applications: Semiconductor wet benches, laboratory chemical processing.
Key specifications: Internal dimensions, wall thickness, port locations, sealing method.
Customization: Custom volumes, port configurations, integrated assemblies to drawing.
Designed for semiconductor wet processes and laboratory applications.
Beyond standard dimensions, FGQuartz specializes in fully customized fused silica components engineered to your precise CAD drawings. We combine advanced hot processing (welding, flame forming) with high-precision cold machining (CNC grooving, optical polishing) to create complex, application-ready parts.
Advanced Quartz Glass Fabrication Capabilities
FGQuartz bridges the gap between raw quartz materials and finished process-ready components. Our manufacturing capabilities encompass both thermal processing and cold machining techniques:
- CNC Grooving & Slotting — Multi-axis precision slotting for wafer boats, carriers, and specialized process fixtures.
- Precision Drilling — Accurate hole placement and diameter control for gas injectors, custom flanges, and fluid ports.
- Thread Machining — Engineered internal and external threads for secure mechanical connections and modular assembly.
- Cutting & Slicing — High-tolerance length and profile cutting of quartz tubes, rods, and solid blocks.
- Grinding & Polishing — Superior dimensional finishing, edge chamfering, and optical surface quality (controlled Ra values).
- Dimensional Machining — Micro-tolerance control over OD/ID, wall thickness, overall flatness, and concentricity.
- Thermal Tube Bending — Stress-relieved, controlled bends for specialized gas delivery and process routing.
- Thermal Forming — Advanced shaping, expanding, and slumping of quartz glass profiles.
- High-Purity Welding — Clean, high-strength seam and butt welds for multi-section tubes, maintaining vacuum integrity.
- Flange & Port Welding — Robust integration of flanges, ball joints, and side-arms onto process chambers.
- Complex Multi-part Assemblies — Combining all above capabilities to produce intricate, fully integrated process equipment components.
- Build-to-Print OEM — We manufacture strictly to your exact CAD specifications (DXF / STEP / PDF formats).
The goal is clear: if your process demands a specific quartz structure, FGQuartz possesses the technology to manufacture it. Learn more about our custom quartz fabrication capabilities.
How to Choose the Right Quartz Glass Product
A practical sequence used by process engineers and procurement teams:
- Define the process — temperature range, chemical environment, optical requirements.
- Identify the required function — containment, wafer support, optical access, structural support.
- Select the product family — tube, rod, plate, boat, crucible, tank or custom component.
- Specify critical dimensions and features.
- Determine standard vs custom — if catalogue sizes do not match, prepare drawing or sample.
- State quantity and surface-finish / tolerance requirements.
- Submit for engineering review.
Providing the application context allows more accurate material and process recommendations.
What Information to Provide for a Quote
To receive an accurate quotation, please supply as much of the following as available:
- Drawing (DXF, STEP, IGES, PDF) or clear dimensioned sketch
- Product type and critical dimensions
- Application / process description
- Operating temperature and chemical environment (if known)
- Required surface finish or optical grade
- Quantity (prototype and/or production)
- Any special features (ports, slots, flanges, bends, threads)
If a complete drawing is not available, a photograph of an existing part plus key dimensions and intended use is often sufficient for an initial assessment.
JGS1 (deep-UV), JGS2 (UV–visible) and JGS3 (infrared), with optional AR coating.
Yes. Every product line is available in custom dimensions and geometries, machined to your drawing.
Quartz tubes, rods, plates and windows, crucibles, semiconductor wafer boats, and custom fabricated components.
Request a Fabrication Quote
Ready to start your next project? Send us your technical specifications, 3D/2D CAD drawings, or application requirements. Whether you need standard stock products or highly complex custom structures featuring grooves, tapped holes, precision flanges, or multi-part weldments, our engineering team will provide a comprehensive and competitive quotation — typically within 24 business hours.