Quartz Plates Manufacturer & Custom Fused Silica Windows
FGQuartz is a premier quartz plates manufacturer specializing in ultra-high-purity fused silica substrates and custom optical window fabrication. We produce both standard precision-ground blanks and fully customized quartz plate structures engineered to exact CAD drawings. Our capabilities encompass optical-grade polishing, large-format base plates, ultra-thin substrates, CNC-drilled flanges, and intricately milled quartz components.
Leveraging over 20 years of advanced cold-machining expertise, we support critical applications across semiconductor processing, high-power laser systems, UV curing equipment, and extreme-temperature laboratory environments. From rapid prototyping to scalable volume production, FGQuartz delivers flawless dimensional control, strict parallelism, and exceptional surface quality. Explore our full custom quartz fabrication capabilities.
Quartz Plates Overview
FGQuartz manufactures process-grade and optical-grade quartz plates designed to withstand extreme thermal shock, aggressive chemicals, and intense UV/IR radiation. From standard raw cut plates to lapped and double-sided polished (DSP) windows, we tailor our solutions to your specific optical and mechanical requirements.
We supply:
• Standard cut and centerless-ground quartz blanks
• Optical-grade fused silica windows (JGS1, JGS2, JGS3)
• Large-format plates for semiconductor base supports
• Fully customized shapes engineered to CAD drawings
Whether your process demands a simple high-temperature viewport or a complex substrate featuring blind holes, precision slots, and stepped edges, our multi-axis CNC centers guarantee perfect execution. For complementary high-purity components, view our quartz tubes, quartz rods and custom quartz assemblies.
Typical Specifications of Quartz Plates
The following tables reflect the baseline specifications for our high-purity quartz plates. Dimensions, surface roughness (Ra), and flatness are fully customizable based on your engineering drawings. For complete material data, refer to our Technical Specifications.
1. Dimensional & Machining Range
| Parameter | Typical Range | Notes |
|---|---|---|
| Thickness | 0.5 mm – 50 mm+ | Ultra-thin wafers and heavy-duty structural blocks available |
| Format Size | Up to 1200 mm × 1200 mm | Larger monolithic formats available upon review |
| Surface Finish | As-cut, Fine-ground, or DSP (Double-Sided Polished) | Scratch/Dig up to 20/10 for optical grade |
| Flatness & Parallelism | Down to λ/10 ; Parallelism < 30 arc seconds | Strictly controlled via advanced lapping metrology |
2. Material Purity (Fused Silica)
| Property | Typical Value |
|---|---|
| SiO₂ Purity | ≥ 99.99% – 99.999% |
| Metallic Impurities | Ultra-low (Semiconductor Grade) |
| Material Designations | Synthetic Fused Silica / Natural Fused Quartz |
| Available Optical Grades | JGS1 (Far UV), JGS2 (UV/Vis), JGS3 (Infrared), Opaque |
3. Thermal & Physical Performance
| Property | Typical Value |
|---|---|
| Continuous Operating Temp. | Up to 1200 °C |
| Short-term Maximum Temp. | Up to 1300 °C |
| Softening Point | Approx. 1680 °C |
| Coefficient of Thermal Expansion | 5.5 × 10⁻⁷ /°C (Near-zero expansion) |
| Thermal Shock Resistance | Outstanding |
Note: Specifications represent typical values. Custom dimensions and precision tolerances are verified against customer drawings during the engineering review.
Quartz Plate Types We Engineer
Below are the primary quartz plate components FGQuartz routinely fabricates. Whether you require a raw substrate or a complex machined interface, we deliver uncompromising precision.
Precision Quartz Blanks & Substrates
We manufacture a full range of standard fused quartz substrates with strictly controlled thickness and edge profiles.
Available options include:
• Fine-ground clear quartz plates
• Large-format base plates for thermal processing
• Ultra-thin quartz substrates
• Heavy-duty structural blocks
Widely utilized as furnace chamber bases, thermal shields, and general high-temperature mechanical supports in semiconductor and industrial processes.
Optical-Grade Quartz Windows
Double-sided polished (DSP) optical windows ensuring maximum light transmission and minimal waveform distortion.
Typical uses:
• High-vacuum viewports
• Laser system protective windows
• Broad spectrum (UV-Vis-IR) transmission lenses
Engineered from JGS1/JGS2/JGS3 materials to guarantee high clarity and strict surface scratch/dig criteria. Ideal for optical and laser applications.
CNC Drilled & Ported Plates
Quartz flanges and plates featuring precision-drilled arrays for mounting hardware, gas flow manifolds, or sensor insertion.
We accurately machine:
• High-tolerance through holes
• Stepped and blind holes
• Complex asymmetrical port layouts
Ideal for semiconductor vacuum chambers, custom reactor lids, and integrated equipment interfaces.
Milled & Grooved Quartz Plates
Substrates engineered with complex CNC-milled grooves, pockets, and tracks for alignment and structural interlocking.
We manufacture:
• V-groove and U-groove linear tracks
• Wafer positioning slots
• Proprietary surface geometries
Essential for building semiconductor wafer boats, carrier sleds, and specialized robotic handling fixtures.
Opaque Fused Silica Heat Shields
Opaque (milky) fused silica plates designed specifically for intense thermal insulation and infrared radiation blocking.
Typical uses:
• Furnace heat shields and baffles
• Thermal insulation barriers
• High-temperature furnace door assemblies
Opaque plates deliver superior thermal blocking performance where optical transparency is not required. Suitable for high-temperature industrial systems.
Complex Custom Machined Plates
Fully bespoke, multi-feature quartz plates manufactured seamlessly to OEM specifications.
We provide:
• Precision edge chamfering and bevelling
• Hybrid plates (drilled + grooved + DSP polished)
• Non-standard geometric profiles (octagonal, flanged)
• Scaling from single R&D prototypes to volume batches
Combine all mechanical and optical functions into a single, flawlessly machined quartz component. See our full custom fabrication capabilities.
Advanced Quartz Plate CNC Machining Capabilities
FGQuartz bridges the gap between raw quartz ingots and finished, process-ready components. As a comprehensive quartz fabrication factory, our facility is equipped with specialized multi-axis CNC diamond machining centers designed exclusively for processing hard, brittle fused silica.
Core Cold-Machining Capabilities:
• Precision Cutting & Slicing — High-tolerance waterjet and diamond wire slicing of quartz blocks into exact custom plate dimensions with chip-free edges.
• Double-Sided Lapping & Polishing — Advanced lapping equipment to ensure strict thickness tolerances, extreme parallelism, and optical-grade surface roughness (Ra) down to laser-grade requirements.
• Diamond Core Drilling — Exact placement of through holes, counterbores, and blind holes. Crucial for manufacturing vacuum flanges, gas showerheads, and optical mounting plates.
• Multi-Axis CNC Milling — Precision milling of intricate pockets, tracking grooves, and positioning slots. Used extensively in designing custom semiconductor fixtures and handling systems.
• Edge Profiling & Chamfering — Machining of safety chamfers, radius edges, and complex bevels to eliminate micro-cracking and improve handling safety in cleanrooms.
• Fire Polishing Integration — Combining cold CNC machining with subsequent oxy-hydrogen fire polishing to permanently seal micro-fissures and restore total surface clarity.
Whether you require a standard JGS1 optical window or a heavily engineered, multi-port vacuum chamber baseplate, FGQuartz guarantees perfect execution. Learn more about our comprehensive custom quartz fabrication capabilities.
Industry Applications of Quartz Plates
Semiconductor & Solar
Products we supply:
• Vacuum process viewports and sight glasses
• High-temp wafer carrier base plates
• Multi-hole gas distribution showerheads
Essential for:
• Diffusion, Oxidation, and LPCVD equipment
• Rapid Thermal Processing (RTP) chambers
Discover more via our Semiconductor Quartz and Solar PV Quartz solutions.
Optics, Lasers & Photonics
Products we supply:
• JGS1 / JGS2 optical transmission windows
• Beam splitter substrates and prisms
• High laser damage threshold (LIDT) plates
Essential for:
• High-power commercial laser systems
• Spectrophotometry and interferometry optics
Discover more via our Optical Quartz Glass solutions.
Scientific Laboratory & R&D
Products we supply:
• Extreme-temperature observation windows
• Reaction chamber lids and bases
• Precision cuvette walls and flow cell plates
Essential for:
• High-temperature material synthesis furnaces
• Ultra-clean chemical analytical equipment
Discover Laboratory Quartz.
UV Curing & Specialized Lighting
Products we supply:
• Deep-UV transmitting protective plates
• Thermal barriers for high-intensity lighting
• Waterproof quartz sealing windows
Essential for:
• Industrial UV sterilization and water treatment
• Commercial UV resin curing lines
Suitable for high-performance optical and industrial applications.
Why Choose FGQuartz for Fused Silica Plates
• 20+ Years Legacy: Extensive domain expertise in fused silica machining and optical polishing.
• End-to-End CNC Capability: In-house precision cutting, drilling, multi-axis milling, and double-sided lapping.
• Uncompromising Purity: Semiconductor-grade and Optical-grade (JGS1/JGS2/JGS3) materials always in stock.
• Agile Manufacturing: No MOQ restrictions—we support single rapid prototypes to high-volume OEM blanket orders.
• Build-to-Print Precision: We manufacture strictly according to your proprietary 2D/3D CAD specifications.
• Global Reliability: ISO 9001 certified quality control securing supply chains for technology leaders worldwide.
Our promise is simple: whatever geometry or optical tolerance your plate requires, FGQuartz executes it flawlessly. Browse our complete quartz glass products or request a quote today.
Frequently Asked Questions
Yes. We provide cutting, edge and face polishing, drilling, chamfering and fire polishing to your drawing.
Yes. Anti-reflective coating is available where transmission must be maximized.
We supply custom sizes up to large-format sheets; send your dimensions for confirmation.
JGS1 for deep-UV, JGS2 for UV–visible, and JGS3 for infrared.
Ready to Source Precision Quartz Plates?
Whether you require standard thermally resilient plates, optical-grade DSP windows, CNC-drilled flanges, or highly complex milled substrates, FGQuartz is equipped to meet your exacting standards.
Submit your CAD drawings or dimensional specifications today. Our engineering team will conduct a thorough DFM review and provide a transparent quotation, typically within 24 business hours.