Featured Semiconductor & Optical Quartz Products
Direct from our Donghai automated fabrication facility. Machined strictly to custom DIN/ISO tolerances for diffusion furnaces, plasma etching chambers, excimer laser systems, and high-temperature vacuum apparatus.
Materials Science: Synthetic Fused Silica vs. Natural Fused Quartz
A primer for semiconductor engineers, optical designers, and procurement managers evaluating material purity, hydroxyl (OH¯) concentration, and transmission windows.
Synthetic Fused Silica (JGS1 / Suprasil)
Synthesized via vapor phase hydrolysis of silicon tetrachloride (SiCl₄). Characterized by near-zero metallic impurities (<0.1 ppm total metals) and an ultra-broad transmission range extending down to 185 nm in the Deep Ultraviolet (DUV). Contains controlled OH content preventing 248nm/193nm laser color-center solarization.
Natural Fused Quartz (JGS2 / GE 214)
Manufactured by electric or oxy-hydrogen flame fusion of high-purity natural crystal quartz sands. Delivers exceptional mechanical strength, softening points above 1683°C, and superior structural viscosity. Ideal for semiconductor furnace process tubes, thermal baffles, wafer boats, and sight glasses operating from 260 nm to 2500 nm.
Infrared Grade Fused Quartz (JGS3 / Infrasil)
Electrically vacuum-fused natural quartz engineered with minimal residual water (<5 ppm OH¯). By removing the deep 2.73 μm fundamental water absorption band, JGS3 maximizes optical transmittance across the Mid-Infrared spectrum up to 3500 nm, serving IR pyrometry windows, military guidance sensors, and CO₂ laser optics.
Material Physical, Thermal & Optical Reference Parameters
| Characteristic / Parameter | Synthetic Fused Silica (JGS1) | Optical Fused Quartz (JGS2) | Low-OH Infrared Quartz (JGS3) | Borosilicate 3.3 (Benchmark) |
|---|---|---|---|---|
| SiO₂ Content (Purity) | ≥ 99.999% (5N) | ≥ 99.99% (4N) | ≥ 99.99% (4N) | approx. 81% |
| Spectral Transmission Band | 185 nm – 2500 nm (DUV-NIR) | 220 nm – 2500 nm (UV-NIR) | 260 nm – 3500 nm (Vis-IR) | 350 nm – 2000 nm |
| Hydroxyl (OH¯) Concentration | 800 – 1200 ppm (or <5 ppm DUV dry) | 150 – 200 ppm | ≤ 2 – 5 ppm | N/A (Alkali present) |
| Thermal Expansion (CTE) (0-300°C) | 5.5 × 10⁻⁷ / K | 5.5 × 10⁻⁷ / K | 5.5 × 10⁻⁷ / K | 33 × 10⁻⁷ / K (6x higher) |
| Continuous Maximum Temp | 1100 °C | 1100 °C | 1150 °C | 450 °C |
| Softening Point | 1600 °C | 1683 °C | 1710 °C | 820 °C |
| Laser Damage Threshold (LDT) | > 15 J/cm² @ 1064nm, 10ns | > 8 J/cm² @ 1064nm, 10ns | > 10 J/cm² @ 1064nm, 10ns | < 2 J/cm² |
| Standard Applications | EUV/DUV Optics, Laser Windows | Semi Flanges, Baffle Discs, Tubes | Mid-IR Viewports, Pyrometry Detectors | Standard Laboratory Glassware |
Future Procurement Trends in High-Purity Fused Silica (2025–2030)
Critical insights for Tier-1 supply chain directors, procurement officers, and engineering team leaders managing advanced materials volatility.
Sub-2nm Semiconductor Fab Dependencies
As global wafer fabs transition to High-NA EUV lithography and Gate-All-Around (GAA) architectures, allowable trace elemental impurities (such as Fe, Cu, Ni, Cr) are being tightened from parts-per-million (ppm) to single-digit parts-per-billion (ppb). Sourcing contracts increasingly demand ICP-MS material testing certs for every single ingot lot.
Direct-from-Cluster Sourcing (Donghai Dominance)
To circumvent multiple distributor markups and 26-week lead times from legacy Western conglomerates, European and North American buyers are consolidating supplier bases directly in Donghai, China — the global mineral crystal and processing cluster. This direct factory pipeline cuts raw material costs by 28–42% while enabling bespoke drawings to ship within 10 working days.
Laser Micro-Machining over Diamond CNC
Mechanical milling of ultra-hard, brittle fused quartz routinely leaves sub-surface micro-fissures that propagate under thermal cycling. The industry is rapidly pivoting toward Picosecond and Femtosecond Laser Machining for micro-hole drilling (<0.1 mm), taperless slotting, and contouring — achieving Ra < 0.2 μm without subsurface micro-cracks.
Digital DFM Verification & Rapid Quoting
Procurement friction in customized quartzware has historically stemmed from complex 3D CAD manufacturability misunderstandings. Modern top exporters now provide automated Design For Manufacturability (DFM) analysis within 2 hours, verifying flame-welding radii, thermal stress relief margins, and GD&T feasibility before prototype casting.
Engineering Competence: Zunex Quartz Products Co., Ltd.
Combining natural resource proximity in Donghai County with aerospace-grade CNC machining, advanced laser finishing, and verified B2B trade compliance.
100% Drawing Processing
Whether handling PDF, DWG, DXF, or 3D STEP files, our senior tooling engineers optimize tolerances down to ±0.01 mm for wafer carriers, spiral heating elements, and laser cavity plates.
≤ 2h Fast Turnaround
Verified 100% response rate on Alibaba.com trade systems. Direct engineering assessment ensures quotations include detailed material grades, chemical certificates, and lead times within 120 minutes.
43% Reorder Retention
Our verified buyer repurchase rate reflects long-term supply relationships with PV ingot producers, semiconductor foundries, analytical instrument manufacturers, and vacuum coating plants.
Custom Heavy Export Packaging
Zero-breakage export protocols: multi-layer vacuum shrink wrapping, anti-static moisture barriers, high-density custom EVA foam moulds, and reinforced ISPM-15 export wooden crates.
Frequently Asked Technical Questions by Global Buyers
Practical material, machining, and logistics answers for enterprise component engineers.
1. How does Zunex prevent devitrification (crystallization) during prolonged 1100°C+ operation? +
2. What is the fundamental difference between JGS1, JGS2, and JGS3 quartz glass? +
• JGS1 (Synthetic Fused Silica): Produced by vapor deposition using SiCl₄. It has no metallic impurities, offers supreme transmission from 185 nm to 2500 nm, and displays no bubble or inclusion structures (Bubble Class 0). It is essential for deep-UV laser windows, stepper optics, and semiconductor photolithography.
• JGS2 (Optical Grade Fused Quartz): Smelted from purified natural crystalline silica quartz sands using an oxy-hydrogen flame. Transmits strongly from 220 nm to 2500 nm with good UV performance, making it the industry's most cost-effective standard for sight glasses, reactor chambers, and lamp sleeves.
• JGS3 (Infrared Grade Fused Quartz): Melted under electric vacuum conditions to extract hydroxyl radicals. With OH content under 5 ppm, it completely eliminates the 2.73 μm absorption dip, delivering high transmission from 260 nm across the infrared spectrum up to 3500 nm.
3. What mechanical and geometric tolerances can your factory maintain on complex quartz parts? +
• Dimensional Tolerances: ±0.05 mm standard; ±0.01 mm on ground optical flats.
• Surface Finish (Polishing): 80/50 scratch-dig for industrial viewports; 60/40, 40/20, and 20/10 scratch-dig for precision laser cavity windows, with Ra < 0.5 nm via CMP.
• Parallelism & Flatness: Flatness up to λ/4 or λ/10 per 25 mm aperture; parallelism down to < 10 arcseconds.
• Micro-Hole Drilling: Diameters down to 0.15 mm without edge breakout or thermal stress cracks via laser trepanning.
4. Can fused silica withstand immediate thermal quenching into cold water from 1000°C? +
5. What file formats do you accept for custom manufacturing, and what is your prototyping timeline? +
6. What is the process for replacing quartz ware damaged during international transit? +
Accelerate Your Quartz Component Sourcing
Direct factory pricing. Rapid 2-hour engineering DFM reviews. Seamless custom production from drawing to delivered prototype. Connect directly with our Donghai technical sales engineers right now.