Engineered Quartz & Fused Silica Components for Hanoi High-Tech Industries
Manufactured directly at our integrated production plant in Donghai, Jiangsu, and precision-engineered for North Vietnam's semiconductor fabs, electronics SMT lines, and cleanroom optical instruments.
Quartz Ring
High-Purity Fused Quartz Large Diameter Round Rods Cutting Welding & Bending Services
Translucent Quartz Glass Pipe Quartz Glass Sleeve Opaque Milky White Quartz Glass Tube
Fused Transparent Quartz Tube
Graphene Quartz Heating Tube
220v/380v 400mm 15*33mm Diameter Infrared Heating Tube Carbon Fiber/Halogen Tube
Ultra Clear High Purity Quartz Sheet
Customized Size Clear Quartz Glass Tube BET Borosilicate Glass Test Tube
Fused Silica Plate Metallurgy: Grade Selection & Thermomechanical Limits
In semiconductor lithography, photovoltaic diffusion, and vacuum plasma processing, choosing between Synthetic Fused Silica (JGS1), Optical Grade Quartz (JGS2), and Low-OH Infrared Quartz (JGS3) dictates optical transmission efficiency, laser longevity, and thermal degradation rates.
JGS1 Synthetic Fused Silica (Deep UV)
Synthesized via SiCl₄ flame hydrolysis, yielding extreme chemical purity with metallic impurity concentrations under 1.0 ppm total. Features zero bubble inclusion classes (Class 0 under DIN ISO 10110), delivering > 90% transmission down to 185 nm. The premier substrate for KrF/ArF excimer laser windows, photolithography mask blanks, and UV curing systems in Hanoi electronic fabrication centers.
JGS2 Optical Fused Quartz (Visible & UV)
Produced by high-temperature electric vacuum fusion of premium Donghai natural crystalline quartz. Delivers exceptional transmission across 220 nm to 2500 nm, combined with rugged structural rigidity and near-zero coefficient of thermal expansion (5.5 × 10⁻⁷ /°C). Serves as the global standard for RTP wafer furnace viewing windows, solar cell diffusion carriers, and optical sight ports in Bac Ninh cleanrooms.
JGS3 Low-OH Infrared Quartz (NIR to SWIR)
Synthesized through gas-vacuum thermal extraction, reducing hydroxyl (OH⁻) radicals to < 2 ppm to eliminate the characteristic OH⁻ absorption trough at 2.73 μm. Provides crystal-clear IR transparency reaching out to 3.5 μm. Essential for infrared thermal imaging sensors, pyrometer viewing ports, high-output halogen heaters, and CO₂ laser optical shields deployed across Northern Vietnam manufacturing sites.
| Material Property | JGS1 (Synthetic Silica) | JGS2 (Optical Fused Quartz) | JGS3 (Low-OH Fused Silica) | Standard Laboratory Glass |
|---|---|---|---|---|
| SiO₂ Purity Level | ≥ 99.999% (5N) | ≥ 99.99% (4N) | ≥ 99.995% | ≤ 80% (Borosilicate) |
| Optical Spectrum Transmission | 185 nm – 2,500 nm (Deep UV) | 220 nm – 2,500 nm (UV-Vis) | 260 nm – 3,500 nm (Infrared) | 350 nm – 2,000 nm (Visible only) |
| Hydroxyl (OH⁻) Content | 800 – 1200 ppm | 30 – 150 ppm | < 2 – 5 ppm | Variable (> 300 ppm) |
| Thermal Expansion (20–300°C) | 5.5 × 10⁻⁷ /°C | 5.5 × 10⁻⁷ /°C | 5.4 × 10⁻⁷ /°C | 33 × 10⁻⁷ /°C (High Drift) |
| Continuous Operating Temp | 1,150 °C | 1,100 °C | 1,150 °C | 450 °C (Melts / Softens) |
| Thermal Shock Resistance | 1,100°C to 20°C Water Quench | 1,100°C to 20°C Water Quench | 1,100°C to 20°C Water Quench | Fails at > 160°C ΔT |
| Dielectric Constant (1 MHz) | 3.75 | 3.78 | 3.75 | 4.6 – 6.8 |
Thermo-Mechanical Resilience Under Plasma & High-Vacuum Conditions: Clear fused silica plates engineered by Donghai County Nivra Quartz Products Co., Ltd. offer complete immunity to catastrophic thermal runaway. When exposed to rapid thermal cycling in plasma etching chambers (utilizing CF₄, SF₆, or NF₃ gases), the near-zero expansion coefficient ensures that thermal expansion mismatches do not produce interfacial delamination, micro-cracks, or particle spalling that could contaminate 300 mm silicon wafers.
Precision Quartz Applications in Hanoi & Northern Vietnam Industrial Corridors
Northern Vietnam has emerged as Southeast Asia’s most dynamic production corridor for advanced electronics, displays, and photovoltaics. We supply high-specification fused silica components directly to facilities in Hanoi, Bac Ninh, Bac Giang, and Thai Nguyen.
1. Semiconductor Packaging & Wafer Testing (Bac Ninh / Yen Phong)
Tier-1 OSAT (Outsourced Semiconductor Assembly and Test) plants and IC packaging facilities operating in Yen Phong and VSIP Bac Ninh require custom fused silica wafer plates for thin-wafer support during chemical-mechanical planarization (CMP), back-grinding, and photolithography alignment. Our plates feature total thickness variation (TTV) < 2 μm and surface flatness of λ/4 per 100 mm diameter, ensuring zero focal deflection during laser micro-drilling and automated optical inspection (AOI).
2. Photovoltaic Solar Cell & Wafer Diffusion (Bac Giang / Quang Chau)
The major solar cell manufacturing clusters in Quang Chau and Van Trung Industrial Parks rely heavily on Nivra Quartz ultra-clear sheets, translucent quartz heating tubes, and fused silica furnace windows. Operating inside boron and phosphorus trichloride (POCl₃) diffusion furnaces at 950°C to 1150°C, our quartz plates provide continuous thermal insulation without sagging, devitrification, or alkali ion migration, sustaining uniform sheet resistance across monocrystalline PERC and TOPCon cell batches.
3. SMT UV-Curing & Optical Inspection (Hoa Lac Hi-Tech / Noi Bai IP)
Electronics assembly and flexible printed circuit (FPC) manufacturers in Hanoi utilize our optical quartz plates as protective conveyor heat shields and UV exposure stages. When UV LED curing lamps output narrow-band radiation at 365 nm and 395 nm, Nivra Quartz plates ensure 93% transmission without optical solarization, shielding sensitive camera sensors and PCB substrates from excessive radiant thermal flux.
4. High-Temperature Metallurgical & Petrochemical Sight Glasses
Heavy industrial processing units, analytical research laboratories at Vietnam National University, and regional metallurgical smelters require high-pressure fused quartz sight discs. Capable of withstanding hydraulic shock pressures exceeding 2.5 MPa at continuous temperatures of 1100°C, our circular quartz discs provide safe visual process monitoring for corrosive, supercritical fluid reactions.
The Vietnam Semiconductor Pivot: Fast-Track Donghai-to-Hanoi Supply Chains
Under Vietnam's National Strategy for the Semiconductor Industry to 2030, Hanoi and surrounding provinces are transitioning rapidly from low-margin assembly to front-end chip design, fab construction, and high-precision electronics manufacturing.
The Strategic Necessity of Chinese Factory Integration: While global electronics brands expand capital equipment investments in Northern Vietnam, the upstream raw materials for high-temperature semiconductor processing—specifically high-purity natural silica sand and crystal smelting facilities—remain heavily concentrated in Donghai County, Jiangsu, China. Sourcing fused silica plates directly from Donghai Nivra Quartz eliminates distributor markups, reduces lead times, and guarantees traceable metallurgical batch certificates.
Accelerated Cross-Border Logistics via Pingxiang / Friendship Pass (Hữu Nghị): The geographic proximity between Jiangsu, China, and Hanoi offers a significant logistical advantage compared to ocean shipments from Europe, Japan, or North America. By utilizing bonded road freight corridors:
48–72h Overland Transit
Express cross-border trucks transit from our Donghai facility directly through Pingxiang / Youyi Guan (Friendship Pass) into Hanoi and Bac Ninh within 3 days, maintaining unbroken chain-of-custody for urgent production line replenishments.
Form E Zero-Tariff Exemption
Under the ASEAN-China Free Trade Area (ACFTA), our export compliance team issues authentic Form E Certificates of Origin, reducing import tariffs on quartz glass (HS Codes 7002.31, 7002.39, 7006.00) from standard rates directly to 0%.
Custom Shock-Damped Packaging
Each quartz plate is cleaned in Class 100 cleanrooms, vacuum-sealed in static-shielding film, cushioned with customized EPE micro-cell foam, and secured inside fumigation-free reinforced wooden crates built for overland vibration protection.
Why Global Tier-1 Tech Buyers Partner with Nivra Quartz
Founded in February 2019 in Donghai County—the crystal and quartz capital of China—Donghai County Nivra Quartz Products Co., Ltd. operates an integrated precision manufacturing facility covering cutting, CNC grinding, laser core drilling, fire polishing, and optical metrology.
Direct Origin Metallurgy
Located in the global center for quartz crystal reserves, we secure first-grade raw silica feedstock at stable factory-direct pricing, passing significant cost efficiencies onto Hanoi procurement managers.
88.89% Response Rate
With an average inquiry response speed within 5 hours, our experienced optical and chemical engineers provide immediate DFM (Design for Manufacturability) analysis on customer CAD/STEP drawings.
Sub-Micron CNC Machining
Equipped with 5-axis ultrasonic CNC machining centers, precision surface grinders, laser slotting, and double-sided planetary lapping tools capable of holding dimensional tolerances to ±0.01 mm.
Comprehensive OEM/ODM
From single-piece rapid prototyping for engineering trials to scheduled monthly batch delivery of thousands of optical discs, we supply customized quartzware with verified batch inspection reports.
Frequently Asked Questions by Hanoi B2B Sourcing Teams
Clear, technically rigorous answers addressing cross-border shipping, material grade verification, customs clearance, and quality assurance for engineering buyers in Vietnam.
Q1 What is the typical shipping lead time from your Donghai factory to Hanoi?
For stocked dimensions and standard quartz sheets, dispatch takes 24–48 hours. Using door-to-door express overland trucking via Pingxiang / Youyi Guan (Friendship Pass), transit to Hanoi, Bac Ninh, or Bac Giang industrial parks takes approximately 48 to 72 hours. Air courier services (DHL, FedEx) take 2 to 4 days, while full container load (FCL) sea freight via Lianyungang/Qingdao port to Hai Phong Port requires 7 to 10 days.
Q2 Can Nivra Quartz provide Form E for preferential 0% tariff clearance in Vietnam?
Yes. As a verified Chinese manufacturer and registered exporter, we issue official ACFTA Form E Certificates of Origin for every shipment to Vietnam. This documentation enables Vietnamese importers to claim complete preferential tariff exemption (lowering standard import duties of 5%–15% down to 0% under HS codes 7002.31, 7002.39, and 7006.00).
Q3 How do we verify whether our application requires JGS1, JGS2, or JGS3 fused silica?
Selection is determined by working wavelength and hydroxyl tolerance. If your process operates in the deep ultraviolet range (185–260 nm) such as UV lithography or excimer laser processing, synthetic JGS1 is strictly required. For general furnace viewing, semiconductor diffusion, and visible optics (220–2500 nm), JGS2 provides the most economical performance. For infrared spectrometry, thermal imaging, or pyrometry (up to 3.5 μm), JGS3 Low-OH quartz is required to eliminate water-band absorption.
Q4 What surface quality and flatness tolerances can your CNC optical polishing achieve?
Our standard precision optical plates reach MIL-PRF-13830B scratch-dig specifications of 40-20 or 20-10, with surface roughness Ra < 0.5 nm (super-polished grades down to Ra < 0.2 nm). Dimensional tolerances can be maintained to ±0.01 mm for CNC cut profiles, with optical parallelism < 10 arcseconds and transmitted wavefront distortion (TWD) better than λ/4 at 632.8 nm.
Q5 How do you guarantee that fragile quartz glass plates arrive undamaged?
We employ a multi-tier protective packaging system refined through thousands of overseas shipments. Each quartz plate is individually wrapped in lint-free protective film, vacuum-sealed in anti-static polybags, cushioned in custom-cut high-density EPE shock absorption foam, and packed in reinforced multi-wall cartons inside heavy-duty, fumigation-free plywood crates with tilt and impact indicators.
Q6 What CAD drawing file formats do you accept, and what is your prototyping MOQ?
We accept STEP, STP, DWG, DXF, IGES, and high-resolution PDF technical drawings with indicated geometric dimensioning and tolerancing (GD&T). For custom prototyping and pilot evaluations, our Minimum Order Quantity (MOQ) starts from just 1 to 5 pieces, allowing your engineering team to validate performance before committing to mass production volumes.
Accelerate Your Quartz Sourcing with China’s Premier Factory Supply to Hanoi
Whether you need rapid CAD feasibility reviews, customized prototype fused silica plates, or high-volume recurring deliveries for semiconductor and solar cell fabs in Northern Vietnam, our metallurgical team is ready to assist with factory-direct pricing and full technical documentation.