Factory-Direct Quartz Substrates & Fabricated Optics
Specially processed for low thermal expansion, broadband optical transmission, and extreme chemical durability. Browse our core substrate configurations supplied to technology manufacturers across Da Nang.
The Strategic Rise of Da Nang as Vietnam's Semiconductor Frontier
An analytical overview of material prerequisites, cleanroom infrastructure, and dielectric purity demands driving fused quartz adoption across Central Vietnam’s industrial zones.
The city of Da Nang has rapidly transformed from a coastal tourist economic hub into the epicenter of Vietnam’s high-tech manufacturing, semiconductor design, and advanced packaging ecosystem. Anchored by the Da Nang Hi-Tech Park (DHTP), the Lian Chieu industrial development zones, and newly established research engines like the Da Nang Semiconductor and Artificial Intelligence Center for Research and Training (DSAC), the municipality is proactively fulfilling the Prime Minister's Decision on the National Strategy for Semiconductor Industry Development toward 2030 and vision 2050.
As multinational technology corporations, outsourced semiconductor assembly and test (OSAT) facilities, and optoelectronic developers set up operations within DHTP, the demand for precision substrate materials has surged exponentially. Fused quartz substrates (amorphous silicon dioxide, SiO₂) represent a cornerstone material for these manufacturing workflows. Unlike conventional borosilicate or soda-lime glass, high-purity fused quartz offers a near-zero coefficient of thermal expansion (5.5 × 10⁻⁷ /°C), allowing substrates to maintain exceptional mechanical stability under rapid thermal processing (RTP) and localized laser irradiation exceeding 1,100°C without mechanical distortion or micro-cracking.
Localized Industrial Use Cases in Da Nang’s Tech Ecosystem
Bridging the gap between raw material crystallography and fab floor implementation across key regional manufacturing sectors.
Semiconductor Wafer Carriers & PECVD
Substrates operating inside PECVD and LPCVD reactors within Da Nang High-Tech Park. Our high chemical resistance to aggressive halogen plasma, hydrofluoric (HF) acid, and sulfuric-peroxide mixtures ensures prolonged cycle longevity during wafer transport and etching processes without ion leaching.
Deep UV Optical Windows & Steppers
Optical inspection windows and laser projection lithography plates. Delivering over 90% internal transmittance at critical wavelengths from 193 nm (DUV) through the visible spectrum into near-infrared (NIR), minimizing optical dispersion and laser-induced wavefront distortions.
Optoelectronics & Micro-LED Assembly
High thermal dissipation carrier plates for optical sensor packaging and Micro-LED assembly lines. Double-side optically polished (DSP) with surface flatness up to λ/4 per 100mm and surface microroughness Ra < 0.5 nm, providing an atomically uniform bonding foundation.
High-Vacuum Chamber Viewports
Engineered viewports for high-vacuum (HV) and ultra-high-vacuum (UHV) thin-film coating chambers. Capable of enduring continuous thermal cycles up to 1,100°C and delta pressures exceeding 5 bars without helium leak rates exceeding 1 × 10⁻¹⁰ mbar·l/s.
Academic R&D & Nanotech Testing
Supplying custom CNC micro-drilled and slotted quartz plates to advanced laboratories at the University of Da Nang (DUT) and public-private incubation facilities, facilitating novel microfluidics, biosensor development, and materials science research.
High-Power Industrial Laser Systems
Precision-cut fused silica protective plates and debris shields deployed in CNC fiber laser processing systems operating across central Vietnam’s electronics prototyping and high-precision mechanical workshops.
Substrate Comparison & Physical Property Benchmarks
Evaluate physical, thermal, and optical performance values to match precise engineering tolerances for your fab or tooling line.
| Performance Characteristic | Synthetic Fused Silica (JGS1) | Optical Fused Quartz (JGS2) | Commercial Fused Quartz (JGS3) | Standard Borosilicate |
|---|---|---|---|---|
| SiO₂ Purity Grade | ≥ 99.9999% | ≥ 99.99% | ≥ 99.95% | ≈ 81% |
| Hydroxyl (OH⁻) Content | < 5 ppm (Dry) / 1200 ppm (Wet) | < 30 ppm | < 50 ppm | Non-applicable |
| Thermal Expansion (CTE) | 5.5 × 10⁻⁷ / °C | 5.5 × 10⁻⁷ / °C | 5.5 × 10⁻⁷ / °C | 32.5 × 10⁻⁷ / °C |
| Max Working Temperature | 1,150 °C (Continuous) | 1,100 °C (Continuous) | 1,050 °C (Continuous) | 500 °C |
| UV Cut-off Wavelength | 170 nm (Deep UV) | 220 nm (Standard UV) | 260 nm (Optical) | ≈ 320 nm |
| Dielectric Constant (1 MHz) | 3.75 | 3.78 | 3.80 | 4.60 |
| Standard Surface Finish (Ra) | < 0.5 nm (CMP Polished) | < 1.0 nm (Double Polished) | < 2.0 nm (Ground/Fine) | > 5.0 nm |
Selecting between synthetic fused silica and natural fused quartz involves evaluating spectral transmittance demands against budgetary targets. For advanced wafer photolithography, UV curing lamps operating at 254 nm and 185 nm, and excimer laser viewports in Da Nang laboratories, JGS1 synthetic silica provides transmission efficiency surpassing 90% across the vacuum-ultraviolet band. For diffusion furnace hardware, CVD heating trays, and structural wafer supports, JGS2 and JGS3 deliver equivalent thermal shock resilience and structural integrity at an advantageous total cost of ownership.
Why Da Nang Engineers & Procurement Direct-Source From VEZLO
Complete vertical integration from raw Donghai crystalline silica melting to cleanroom substrate finishing and rapid direct logistics.
Donghai Quartz Origin
Located in Donghai County, China's quartz capital, across a 33,000 m² (50 mu) production facility. Direct access to premium natural crystal feedstock maintaining total metallic impurities ≤ 20 ppm across 13 proprietary sand grades.
State-Level R&D Recognition
Pioneered the 320mm high-purity quartz tube for integrated circuits under the Jiangsu Provincial Science & Technology Support Project. Industrialized 520mm ultra-large-diameter capability approved under national new product reviews.
Precision CNC & Laser Micromachining
Equipped with multi-axis CNC milling centers, ultrasonic drilling, laser contour cutters, and double-side chemical mechanical polishing (CMP). Custom tolerances down to ±0.01 mm according to CAD drawings.
ASEAN Logistics & Fast Response
Dedicated international logistics channels direct to Da Nang Port (Tien Sa) and Da Nang International Airport (DAD). Sub-2-hour response time for technical RFQs, certified with ASEAN-China Free Trade Agreement (Form E).
Seamless Importing & Cleanroom Packaging for Da Nang Fabs
Optimizing freight routes, tariff compliance, and packaging protocols for microelectronics procurement teams in Central Vietnam.
Procuring quartz components for high-reliability semiconductor or optoelectronic production requires stringent adherence to international trade guidelines and contamination control. VEZLO implements standard export packaging and regulatory documentation tailored specifically for Vietnam’s customs procedures:
Form E Tariff Exemption
Under the ASEAN-China Free Trade Area (ACFTA), we issue certified Form E Certificates of Origin for all quartz shipments. This enables Da Nang importers to clear goods under preferential 0% or substantially reduced import tariff classifications (HS Code 7002.31 / 7006.00).
Class 1,000 Cleanroom Packaging
To prevent surface particulate adhesion during transit, each optical substrate undergoes ultrasonic deionized water cleaning before being vacuum-sealed in double antistatic PE bags inside a Class 1,000 cleanroom environment, protected by custom high-density EPE foam cushions.
Multimodal Shipping Routes
Expedited air cargo delivery via Da Nang International Airport (DAD) within 3 to 5 business days for time-critical prototype wafers and furnace repair parts. Bulk sea cargo routed directly into Tien Sa Port or Hai Phong transit corridors within 8 to 12 days.
Frequently Asked Questions by Da Nang Buyers
Direct answers to the common technical, metallurgical, and logistics questions asked by local process engineers and purchasing directors.
What are the maximum dimensions and thickness tolerances for custom quartz substrates?
How does fused silica perform when exposed to etching chemicals like Hydrofluoric (HF) Acid?
Can we request specialized hole drilling, edge beveling, and slotting according to engineering CAD files?
How do you eliminate transit damage and chipping for fragile quartz glass sent to Vietnam?
What documentation and purity certifications are provided with each production lot?
Accelerate Your Semiconductor & Optics Sourcing in Da Nang
Whether you require prototype quartz wafer carriers for R&D at Da Nang Hi-Tech Park or scheduled volume deliveries of optical vacuum viewports, our engineering desk is available to review your drawings and deliver a competitive factory-direct quote within 2 hours.
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