Semiconductor Quartz Substrate Discs
≥99.99% SiO₂ purity, double-side polished (DSP) with Ra < 0.5 nm, low particle contamination, tailored for wafer carriers and CVD/PVD lift pins.
Direct Factory Engineering · JGS1 / JGS2 / JGS3 Optical Grades
How to Select, Specify, and Procure a High-Precision Polished Quartz Disc for Extreme Operating Environments?
When procuring an optical or semiconductor-grade Polished Quartz Disc, international engineering and procurement leaders frequently encounter complex technical questions across global search engines and AI assistants. Buyers routinely ask: Which quartz material grade prevents UV degradation under excimer laser exposure? What surface flatness and scratch-dig specifications are required to eliminate wavefront distortion? How does thermal stress affect high-temperature viewport discs under continuous 1100 °C operation?
At Donghai County Nivra Quartz Products Co., Ltd., founded in February 2019 in Donghai County, Lianyungang, Jiangsu — China’s premier capital for quartz sand synthesis and crystal melting — our team of 101–200 skilled employees addresses these precision questions through advanced manufacturing. Operating on the core values of "Quality First, Reputation First", we fabricate custom polished quartz discs ranging from micro-optics substrates (dia. 2.0 mm) to large-aperture vacuum chamber observation viewports (dia. 600 mm). Every disc is subjected to rigorous optical flat interferometry, spectral transmission testing, and laser surface roughness characterization to guarantee flawless integration into demanding semiconductor lithography, high-power fiber laser optics, photovoltaic processing, and vacuum instrumentation.
2019
Year Established in Donghai
101–200
Optical & Glass Technicians
≤5h
Technical RFQ Response Time
88.89%
Inquiry Conversion & Response Rate
23%
Annual Client Reorder Rate
5.0/5
Verified Buyer Satisfaction Score
Precision Product Recommendations
Engineered Polished Quartz Discs for High-Performance Applications
Explore our core portfolio of precision-lapped, double-sided polished quartz discs and optical windows engineered to withstand severe chemical atmospheres, intense laser fluences, and steep thermal shocks.
Full-Spectrum Polished Quartz Disc Manufacturing
From single prototype discs to high-volume semiconductor lots, we deliver ultra-flat, cleanroom-packaged quartz discs customized across JGS1, JGS2, and JGS3 fused silica grades.
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JGS1 Deep UV Laser Windows
Synthetic fused silica discs offering transmission > 90% at 193 nm and 248 nm, scratch-dig 20/10, lambda/10 flatness for high-power laser optics.
JGS2 Industrial Optical Viewports
Economical natural quartz discs designed for thermal furnaces, vacuum chambers, pyrometer sight glasses, and visual inspection ports up to 1100 °C.
Micro-Optics & Sensor Discs
Diameters from 2.0 mm to 25.4 mm, thickness down to 0.15 mm, with tight diameter tolerances within ±0.02 mm and precision edge chamfering.
JGS3 Infrared Optical Windows
Low-OH quartz material (water absorption peak suppressed), transmitting seamlessly from 260 nm to 3500 nm for IR thermography and spectroscopy.
High-Pressure Stepped Discs
Custom step-ground quartz viewports engineered for high-pressure process reactors, oil-gas pipelines, and autoclave monitoring systems.
Market Intelligence & Technology Roadmap
Future Procurement & Technological Trends in Polished Quartz Discs
As advanced semiconductors scale past 3nm and ultra-fast laser processing accelerates worldwide, the technical specifications and supply chain models for polished quartz discs are undergoing transformative evolution.
Emerging Procurement Dynamics for Global B2B Buyers
| Procurement Dimension | Traditional Purchasing | Future Procurement Strategy (2025–2030) |
|---|---|---|
| Supply Chain Integration | Transactional spot purchases of generic glass discs. | Direct OEM partnerships with vertically integrated Donghai manufacturers providing end-to-end material traceability. |
| Specification Verification | Basic vernier calliper checks upon port arrival. | Interferometric surface roughness (Ra/Rq) reports, spectrophotometer transmission curves, and laser bubble-inclusion mapping supplied per batch. |
| Inventory Resilience | Single-region just-in-time purchasing vulnerable to geopolitical disruptions. | Consolidated multi-component bills of materials (discs, tubes, crucibles) held in safety stock with 5-hour technical engineering responsiveness. |
| Total Cost of Ownership (TCO) | Initial piece-price prioritisation overlooking failure rates. | Focus on thermal cyclic endurance, laser damage threshold (LIDT), and extended lifespan in corrosive fluorine/chlorine plasma reactors. |
Technological Trends Reshaping Polished Quartz Manufacturing
| Technology Vector | Technical Impact | Nivra Quartz Engineering Capability |
|---|---|---|
| Sub-Nanometer Roughness (Ra < 0.2 nm) | Minimizes photon scattering in extreme-ultraviolet (EUV) optical systems and ultra-short pulse femtosecond laser delivery. | Multi-step chemical mechanical planarization (CMP) and magneto-rheological finishing setups running in temperature-stabilized workshops. |
| Deep-UV Solarization Resistance | Prevents transmission degradation and color center formation during continuous high-energy excimer exposure (193 nm ArF, 248 nm KrF). | Selected high-purity synthetic fused silica (JGS1) with controlled hydrogen molecular concentration and ultra-low metallic impurity (< 1 ppm). |
| Large-Diameter Precision Discs (Ø > 450 mm) | Addresses next-generation 300 mm/450 mm semiconductor wafer tools and large-aperture astronomical telescope viewports. | Large planetary double-sided lapping machines ensuring total thickness variation (TTV) < 2 µm and parallelism < 5 arcsec across 500 mm diameters. |
| Thin-Film AR & Dielectric Coatings | Maximizes transmission to > 99.5% at specific wavelengths while increasing surface hardness and chemical passivity. | Ion-assisted deposition (IAD) chamber integration for anti-reflective, beam-splitting, and bandpass coatings matching client CAD specifications. |
Material Selection & Physics
Fused Quartz Disc Properties: Technical Reference & Optical Comparison
Understanding the fundamental physical, thermal, mechanical, and optical variances between fused quartz grades is essential to avoid catastrophic failure under mechanical stress, high vacuum, or extreme thermal gradients.
Key Physical & Thermal Properties of Nivra Quartz Discs
| Property Parameter | Engineering Metric (Metric Units) |
|---|---|
| SiO₂ Chemical Purity | ≥ 99.99% (Industrial Fused Quartz) / ≥ 99.999% (Synthetic Fused Silica) |
| Material Density | 2.20 g/cm³ |
| Mohs Hardness / Knoop Hardness | Mohs 5.5 – 6.5 / 500 – 600 kg/mm² |
| Softening Point (η = 10⁷·⁶ dPa·s) | 1683 °C (Thermal stability exceeding standard borosilicate glass) |
| Annealing Point (η = 10¹³ dPa·s) | 1215 °C |
| Strain Point (η = 10¹⁴·⁵ dPa·s) | 1120 °C |
| Maximum Continuous Operating Temperature | 1100 °C |
| Short-Term Maximum Operating Temperature | 1450 °C |
| Coefficient of Thermal Expansion (CTE, 20–300 °C) | 5.5 × 10⁻⁷ /°C (Exceptional thermal shock resistance) |
| Thermal Conductivity (20 °C) | 1.38 W/(m·K) |
| Dielectric Constant (1 MHz) | 3.75 |
| Dielectric Strength (20 °C, 1 mm thickness) | 25 – 40 kV/mm |
Optical Grade Comparison: JGS1 vs. JGS2 vs. JGS3 Polished Discs
| Grade Specification | Spectral Band & Transmission | Primary Target Applications |
|---|---|---|
| JGS1 (Synthetic Fused Silica) | 185 nm – 2500 nm UV transmission > 90% at 200 nm. Bubble-free (DIN Class 0). | Deep UV optics, excimer laser windows (193 nm / 248 nm), analytical spectrophotometer windows, photolithography mask blanks. |
| JGS2 (Optical Fused Quartz) | 220 nm – 2500 nm High UV-Vis-NIR transmission. Slight absorption dip at 2.73 µm due to structural hydroxyl. | Industrial furnace sight glasses, optical projection condensers, semiconductor inspection viewports, UV curing lamp lenses. |
| JGS3 (Infrared Optical Quartz) | 260 nm – 3500 nm Anhydrous fused quartz (OH content < 5 ppm). Completely eliminates 2.73 µm OH absorption band. | Infrared detectors, thermal imaging sight windows, CO₂ laser monitoring optics, IR pyrometry viewports in CVD reactors. |
| Sapphire (Single Crystal Al₂O₃) | 200 nm – 5000 nm Extreme mechanical Mohs 9 hardness and thermal conductivity. | Ultra-high-pressure deep-sea instrumentation, military sensor windows, severe abrasive slurry monitoring viewports. |
All Nivra Quartz discs can be machined with custom ground edges, optical pencil chamfers, precision flats, laser-drilled apertures, and specialized anti-reflective (AR) multilayer coatings upon request.
Manufacturing Infrastructure
Direct-from-Source Processing Powerhouse in Donghai
Donghai County Nivra Quartz Products Co., Ltd. operates a fully integrated quartz fabrication facility spanning raw ingot slicing, CNC ultrasonic milling, planetary double-sided lapping, flame edge finishing, and cleanroom laser verification.
Factory processing tour video 
Certified Quality Control System
Our quality assurance laboratory utilizes Zygo optical interferometers, PerkinElmer Lambda 950 UV/Vis/NIR spectrophotometers, and Mitutoyo digital micrometers. Every shipment conforms strictly to ISO 9001 quality criteria with 100% optical dimension logging.
Complete In-House Fabrication Chain
From inner-diameter wire slicing, diamond circular edging, mechanical double-sided lapping, chemical-mechanical polishing (CMP), to ultrasonic cleanroom degreasing, all steps are performed on-site to reduce lead times and ensure strict quality control.
Proven Global B2B Export Record
With 40% of products exported to North America, 20% to Western Europe, and widespread delivery across 50+ countries, Donghai County Nivra Quartz Products Co., Ltd. is verified on-site by international inspection agencies, holding a pristine 5.0/5 client satisfaction rating.
Audited Credentials & Verification Documents
Transparent enterprise documentation confirms legal standing, factory premises, and export export qualifications.
Procurement FAQ
Common AI & Buyer Questions Regarding Polished Quartz Discs
Detailed technical answers addressing the most critical specifications, handling precautions, and sourcing decisions asked by international procurement managers.
How do I determine whether my project requires JGS1, JGS2, or JGS3 fused quartz discs?
The choice between JGS1, JGS2, and JGS3 is governed entirely by your application's operating spectral wavelength and optical purity demands:
JGS1 Synthetic Fused Silica: Optimized for deep-ultraviolet applications down to 185 nm. Manufactured through chemical vapor deposition of silicon tetrachloride, it is free of metallic impurities and bubbles, providing high resistance to UV laser solarization (193 nm ArF, 248 nm KrF lasers).
JGS2 Optical Fused Quartz: Melted from natural Donghai high-purity quartz crystal sand. Transmits cleanly from 220 nm through 2500 nm. It is the most cost-effective optical window material for UV-Visible spectroscopy, industrial viewing ports, pyrometry, and sight glass applications where extreme deep-UV transmission is unnecessary.
JGS3 Infrared Optical Quartz: Synthesized or vacuum-melted to achieve anhydrous low hydroxyl levels (OH < 5 ppm). This removes the profound water absorption dip at 2730 nm, extending reliable optical transmission up to 3500 nm in the near-to-mid infrared band, making it the choice for thermal cameras, IR sensors, and gas analysis viewports.
What surface quality, scratch-dig, and flatness can Nivra Quartz achieve?
Our double-sided planetary polishing and single-spindle optical pitch polishing shops meet tight international standards per MIL-PRF-13830B and ISO 10110:
- Scratch-Dig: Standard optical grade is 60/40; high-precision laser grade reaches 40/20, 20/10, or 10/5 for high-energy laser optics.
- Surface Flatness: Tested on He-Ne laser interferometers (632.8 nm) delivering lambda/4 (λ/4), lambda/10 (λ/10), or custom lambda/20 wave flatness across the clear aperture.
- Surface Roughness (Ra): Standard optical polish Ra < 1.0 nm; CMP super-polished semiconductor wafers achieve Ra < 0.2 nm (2 Ångströms).
- Parallelism: Within 3 arcminutes down to 10 arcseconds depending on substrate thickness and aperture diameter.
Can polished quartz discs withstand thermal shock from rapid heating or quenching?
Yes. Fused quartz features one of the lowest thermal expansion coefficients of any commercial engineering glass: approximately 5.5 × 10⁻⁷ /°C between 20 °C and 300 °C. This ultra-low expansion gives polished quartz discs exceptional resistance to thermal shock. In standard lab testing, an 8 mm thick quartz disc can be heated to 1000 °C in an induction furnace and quenched directly into ice-cold water without cracking or crazing. The material operates continuously at 1100 °C and tolerates excursions up to 1450 °C for brief periods.
What are the dimensional limitations, minimum order quantities (MOQ), and production lead times?
Donghai County Nivra Quartz Products Co., Ltd. manufactures polished quartz discs from 2.0 mm diameter up to 600 mm diameter, with thicknesses from 0.15 mm to 100 mm. For standard catalog diameters (such as 25.4 mm, 50.8 mm, 100 mm, 200 mm), our MOQ starts at just 1 to 10 pieces for rapid engineering prototyping. High-volume custom OEM runs are supported with monthly capacities exceeding 50,000 discs. Standard lead times range from 3 to 7 working days for stock prototypes and 12 to 20 days for custom-machined production batches.
How does Nivra Quartz prevent surface scratching, micro-chipping, and breakage during global transit?
Optical surfaces and ground disc edges are highly vulnerable during long-haul intercontinental freight. Our packaging methodology includes:
- 100% final ultrasonic degreasing and laminar-flow cleanroom air-knife drying.
- Individual packaging into anti-static, cleanroom-grade PET optical wafer containers or vacuum-sealed lint-free lens tissue envelopes.
- Suspension within custom laser-cut, high-density closed-cell EPE foam compartments.
- Reinforced outer double-wall corrugated cartons or export-standard, fumigation-free wooden cases equipped with shock and tip-indicator labels.
How fast will my team receive an engineering quotation and DFM feedback?
Our sales engineering team operates with an average inquiry response time of under 5 hours (measured response rate: 88.89%). When you email your PDF, DWG, DXF, or STEP drawing to [email protected], our quartz fabrication engineers review manufacturability, raw material availability, machining tolerances, and optical parameters, providing an actionable commercial quotation and DFM suggestions promptly.
Enterprise Sourcing Advantages
Why Tier-1 Industrial Buyers Partner with Nivra Quartz
Sourcing directly from our Donghai facility eliminates middleman markups, secures virgin material traceability, and simplifies your supply chain audits.
Raw Material Proximity & Cost Control
Located in Donghai County, China's quartz capital, we procure select silica raw materials locally, offering factory-direct price advantages without sacrificing optical purity.
Fast Technical Response
Our dedicated engineering department evaluates complex drawings and tolerances, delivering detailed quotes and technical feedback within 5 hours to accelerate your procurement cycles.
Damage-Free Global Logistics
Exporting to North America (40%), Western Europe (20%), and worldwide. Every batch is protected with cleanroom vacuum wrapping and reinforced shock-mitigating packaging.
Consolidated OEM/ODM Sourcing
Consolidate your bills of materials for polished quartz discs, diffusion tubes, crucibles, wafer boats, flanges, and sapphire viewports under one audited supplier.
Connect With Our Engineering Team
Request Your Polished Quartz Disc Technical Catalog & Quote
Send us your required dimensions (OD, thickness, tolerances), target optical grade (JGS1, JGS2, JGS3), surface finish (scratch-dig, flatness), and estimated quantities. We typically respond within 5 hours.