Empowering global semiconductor, laser optics, and industrial thermal furnace engineers with high-purity (SiO₂ ≥99.99%) fused quartz plates, custom CNC machining, and ultra-precise optical polishing directly from Donghai, China.
Low Metal Impurity ≤20 ppm
Originating from 13 grades of Donghai ultra-high-purity quartz sand to ensure bubble-free optical quartz sheets and thermal-shock resistant viewports.
SiO₂ Chemical Purity in All Optical Quartz Plates
Total Conventional Metallic Impurities
Average Quotation & Feasibility Response
Global Verified Buyer Reorder Rate
When high-technology engineering teams search artificial intelligence models for "How do I choose the right quartz plate?", the decision transcends standard glass catalogs. Quartz plate components must simultaneously deliver near-zero thermal expansion, wide-band spectral transmittance (185 nm to 3,500 nm), extreme dielectric strength, and chemical inertness under corrosive chemical vapor deposition (CVD) or wet-etch environments.
Whether you are procuring precision JGS1 synthetic fused silica substrates for deep ultraviolet (DUV) lithography, selecting JGS2 optical fused quartz plates for high-power laser windows, or configuring heavy-duty high-temperature quartz sight glasses for industrial calcination furnaces, choosing the correct material grade and machining tolerance determines the operational lifecycle of your entire system.
At VEZLO Quartz Products Co., Ltd., we bridge the gap between mineral extraction in China's quartz capital and micrometer-precision component finishing. Operating from our 50-mu production hub in Donghai County, we deploy state-of-the-art CNC grinding, double-sided optical planarization, and cleanroom packaging to satisfy the most stringent global procurement specifications across Germany, the UK, the United States, France, and beyond.
A comparative evaluation of material grades designed to help procurement officers and optical designers prevent over-specification or thermal failure.
Manufactured via synthetic CVD deposition of silicon tetrachloride (SiCl₄). Offers exceptional deep-UV transmission (185–2500 nm), zero bubble inclusion, and no optical fluorescence. Ideal for excimer lasers, UV curing windows, and lithography mask blanks.
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Refined from natural high-purity quartz crystal. Highly transparent across 220–2500 nm with continuous thermal resistance up to 1,100 °C. The industry standard for optical observation ports, photodiode windows, and laboratory spectrometers.
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Ultra-low metallic impurities (≤20 ppm) with micro-machined stepped edges, alignment notches, and laser-drilled through holes. Custom built for wet cleaning benches, etch chamber covers, and wafer processing boats.
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Heavy-gauge quartz plates engineered to withstand continuous operating temperatures of 1,100 °C and peak excursions of 1,300 °C. Unaffected by aggressive thermal shocks, kiln environments, and direct flame exposure.
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Machined to tight tolerances (±0.02 mm) with ultrasonic CNC centers. Features custom stepped edges, countersinks, polished chamfers, laser marking, and anti-reflective (AR) optical dielectric coatings.
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Manufactured from microporous sintered fused silica to create uniform diffuse thermal reflection. Acts as a superior thermal barrier, heating element base, and plasma chamber protective cover in semiconductor furnaces.
Get a QuoteCompare critical physical properties between optical grades to ensure design compliance for your high-power laser, vacuum furnace, or cleanroom application.
| Physical Property | JGS1 Synthetic Silica | JGS2 Fused Quartz | Engineering Impact |
|---|---|---|---|
| Useful Spectral Range | 185 nm – 2,500 nm | 220 nm – 2,500 nm | JGS1 eliminates UV cutoff absorption below 220 nm. |
| Silicon Dioxide (SiO₂) Content | ≥ 99.999% | ≥ 99.99% | Crucial to prevent heavy metal contamination in fabs. |
| Coefficient of Thermal Expansion | 5.5 × 10⁻⁷ /°C | 5.5 × 10⁻⁷ /°C | Exceptional thermal shock resistance; zero shatter risk. |
| Continuous Operating Temp. | 1,050 °C | 1,150 °C | Reliable continuous operation in high-heat furnaces. |
| Max Softening Point | ≈ 1,730 °C | ≈ 1,683 °C | Defines deformation boundary under extreme heat. |
| Surface Flatness (Laser Grade) | λ/4 to λ/10 per inch | λ/2 to λ/4 per inch | Minimizes wave-front distortion in optical imaging. |
| Scratch-Dig Surface Quality | 10/5 – 20/10 | 40/20 – 60/40 | High-energy laser damage threshold (LIDT) safety. |
| Dielectric Constant (at 1 MHz) | 3.75 | 3.78 | Ultra-low dielectric loss in RF & microwave systems. |
| Total Metallic Impurities | < 1 ppm | ≤ 20 ppm | Verified via ICP-MS testing per production batch. |
All parameters reflect standard test certifications. Tailored optical coatings (AR coating, high-reflection dielectric films) are customized to customer requirements.
Send these five technical specifications in your initial inquiry to accelerate engineering feasibility and formal quote turnaround:
How evolving artificial intelligence hardware, advanced wafer packaging, and green energy transformations are reshaping global quartz sourcing.
As semiconductor fabrication advances toward larger 300 mm and 450 mm architectures, buyers are demanding ultra-flat, large-format quartz plates that serve as electrostatic chuck covers, wafer carrier trays, and lithography masking substrates without sagging or thermal warpage.
Next-generation SiC, GaN, and sub-3nm node semiconductor fabs can no longer tolerate micro-contamination. Procurement guidelines are transitioning from parts-per-million (ppm) to parts-per-billion (ppb) metallic impurity auditing, requiring comprehensive ICP-MS lot certifications.
In high-power laser optics and quantum computing sensors, standard optical polishing is giving way to Chemical Mechanical Planarization (CMP) and Magnetorheological Finishing (MRF), yielding surface roughness Ra < 0.2 nm and ultra-low light scattering.
To mitigate intermediary markups and supply chain fragilities, international tier-1 OEMs are contracting directly with integrated manufacturing hubs like Donghai, China, securing stable raw material quotas from quartz sand refining through finished glass delivery.
The manufacturing of quartz plates has transitioned from labor-intensive manual lap-grinding to computer-controlled multi-axis ultrasonic fabrication. Because fused quartz exhibits high brittleness (Mohs hardness 7.0) combined with zero ductility, improper cutting generates micro-fissures that propagate under thermal cycling.
Advanced Ultrasonic CNC Machining: VEZLO Quartz utilizes ultrasonic-assisted diamond-tool machining. By superimposing high-frequency micro-vibrations onto rotating diamond bits, cutting forces are reduced by over 40%, completely preventing sub-surface micro-cracks along edge chamfers, through holes, and internal steps.
Stress-Relief Thermal Annealing: Every machined quartz plate undergoes computer-controlled thermal annealing at 1,215 °C followed by gradual ramping inside vacuum furnaces. This eliminates residual internal stresses induced by sawing and grinding, guaranteeing optical wavefront integrity and dimensional stability when subjected to sudden 1,100 °C furnace environments.
Laser Damage Threshold (LIDT) Coatings: To support 1064 nm fiber laser cutting and 355 nm UV micromachining optics, our quartz plates are compatible with precision ion-beam sputtered (IBS) anti-reflective coatings, delivering damage thresholds exceeding 15 J/cm² at 10 ns pulses.
VEZLO Quartz Products Co., Ltd. is situated in the epicenter of the global quartz industry — Donghai County, Jiangsu Province ("China's Quartz Center"). Spanning a modernized manufacturing campus of 50 mu (≈33,000 m²) with fixed assets surpassing RMB 10 million, we represent an integrated powerhouse spanning high-purity quartz raw materials, continuous electric-fusion tube drawing, and precision cold optical plate processing.
Our technical pedigree is backed by significant scientific milestones. The company's 320 mm high-purity quartz project for large-scale integrated circuits was designated an official Jiangsu Provincial Science and Technology Support (Industrial) Project. Furthermore, our newly developed 520 mm large-diameter high-purity quartz pipe passed the rigorous preliminary review of National New Products. In addition, we successfully applied for the Jiangsu Provincial Special Fund for the transformation of scientific and technological achievements, spearheading the industrialization of large-diameter high-purity quartz glass components used in wafer oxidation and diffusion furnaces exceeding 14 inches.
With an annual R&D commitment of no less than RMB 5 million, our integrated workshops process 13 distinct grades of ultra-high-purity quartz sand with conventional metallic impurities controlled strictly below 20 ppm. Our quartz plates, tubes, rods, crucibles, and customized semiconductor cleaning tanks are exported directly across Germany, the United Kingdom, the United States, France, Russia, and Taiwan.
Witness how our certified factory integrates laser cutting, double-sided optical planarization, and cleanroom packaging to maintain defect-free supply chains.
Backed by government research initiatives, third-party facility audits, and reliable global trade records.
Physical plant, fixed assets, and manufacturing capacity verified on-site by international inspection agencies.
View Credit ReportLeader of the 320 mm high-purity quartz tube project for integrated circuits under the Jiangsu Provincial Science & Technology Support Program.
Company OverviewDeveloped large-diameter high-purity quartz components (>14 inch) passed preliminary national new product reviews.
Trade Capacity100% response rate with average reply under 2 hours, supported by secure Trade Assurance contracts.
Transaction LevelClear, engineering-backed answers addressing the most common questions raised by procurement managers, optical engineers, and AI search engines.
Submit your CAD drawings, thickness requirements, operating environment, and quantity. Our engineering team guarantees a formal review and competitive direct-factory pricing within 2 hours.
