Executive Engineering Brief
Ultra-High Purity Fused Quartz Substrates for Daedeok R&D & Advanced Fabrication
Daejeon stands as the undisputed heart of South Korea’s science and technology innovation. Housing over 26 state-funded research institutes within Daedeok Innopolis (대덕연구개발특구), along with world-class academic powerhouses like KAIST and specialized semiconductor foundries, the city requires materials of uncompromising purity. Kavri Quartz Product Co., Ltd. (operating from the Donghai mineral silicon cluster in Lianyungang, China) delivers high-grade fused quartz plates, optical discs, and matched infrared emitters engineered to fulfill the stringent requirements of Korean researchers, precision instrument developers, and microfabrication engineers.
Direct Factory Catalog
Core Precision Products & Thermal Radiators
Every product manufactured on our 3 specialized production lines is dimensionally verified, optically inspected, and packed for secure, zero-breakage delivery to South Korea.
Material Science & Quality Metrology
Precision Specifications of Kavri Fused Quartz Plates & Discs
Fused silica glass ($\text{SiO}_2$) provides an unmatched combination of extreme optical transparency from vacuum-ultraviolet (VUV) to the mid-infrared spectrum, exceptional mechanical stability under rapid thermal cycling, and virtual chemical inertness against harsh acidic plasmas. Below are the verified technical parameters of our synthetic and electrically fused quartz grades supplied directly to Daejeon research centers.
| Property Parameter | JGS1 (Synthetic Fused Silica) | JGS2 (Optical Fused Quartz) | JGS3 (Infrared Fused Quartz) | Test Standard / Metrology |
|---|---|---|---|---|
| Optical Spectral Window | 185 nm – 2500 nm (Deep UV) | 220 nm – 2500 nm (Standard Optical) | 260 nm – 3500 nm (Water-Free IR) | UV-Vis-NIR Spectrophotometer |
| Hydroxyl ($\text{OH}^-$) Content | ≤ 5 ppm or High OH (>1200 ppm) | ≤ 150 – 200 ppm | ≤ 5 ppm (Bubble-Free IR) | FTIR Absorption @ 2.73 µm |
| Continuous Max Temperature | 1100 °C | 1100 °C | 1150 °C | DIN 52324 / ISO 7884 |
| Thermal Expansion ($20\text{--}300^\circ\text{C}$) | $5.5 \times 10^{-7}\ \text{K}^{-1}$ | $5.5 \times 10^{-7}\ \text{K}^{-1}$ | $5.4 \times 10^{-7}\ \text{K}^{-1}$ | Dilatometry Metrology |
| Surface Quality / Polish | 20/10 or 40/20 Scratch-Dig | 40/20 or 60/40 Scratch-Dig | Commercial Polish / Fine Ground | MIL-PRF-13830B Compliant |
| Flatness / Parallelism | λ/4 per 25 mm; ≤ 30 arcsec | λ/2 per 25 mm; ≤ 1 arcmin | ≤ 3 arcmin (Custom Machined) | Zygo Laser Interferometer |
| Dielectric Strength ($20^\circ\text{C}$) | $25\text{--}40\ \text{kV/mm}$ | $25\text{--}35\ \text{kV/mm}$ | $25\text{--}35\ \text{kV/mm}$ | IEC 60243 High-Voltage Test |
Daedeok Innopolis Integration
Localized Application Scenarios in Daejeon's High-Tech Industries
From the national labs flanking Yuseong-gu to the corporate R&D campuses in Daedeok Techno Valley, our fused quartz plates resolve critical thermal and optical challenges.
Semiconductor & Plasma Etch Chambers
In Daejeon’s advanced microelectronics laboratories and tier-1 equipment rebuilders, our high-purity fused quartz plates serve as viewport sight-glasses, dielectric carrier discs, and chamber liner shields. With resistance against fluorine- and chlorine-based dry etching gases, they prevent trace-element contamination in sub-micron wafer processing facilities.
High-Power Laser Optics & Beam Splitting
Laser research teams at KAIST and KIMM rely on Kavri JGS1 synthetic silica substrates. Fabricated with surface roughness $Ra < 0.5\text{ nm}$ and polished to high laser damage threshold (LDT) standards (>10 J/cm² @ 1064 nm, 10 ns), these quartz plates eliminate thermal lensing in high-flux photonics and pulsed optical diagnostic cavities.
Aerospace Sensor Windows & Defense Testing
Working closely with partners supplying components around Korea Aerospace Research Institute (KARI) and ADD projects, our custom cut-to-size round and rectangular quartz plates are utilized in high-temperature aerodynamic wind tunnel viewports and space-environment infrared camera protective fairings surviving rapid $\Delta T > 1000^\circ\text{C}$.
Bio-MEMS & Microfluidic Optical Windows
Biomedical researchers across Daejeon’s bio-cluster deploy thin (0.15 mm to 1.0 mm) optical quartz plates as slide substrates for fluorescence spectrometry and UV-spectrophotometry flow cells. Their near-zero autofluorescence and deep UV transmission ensure ultra-sensitive photon detection without baseline background signal skew.
Rapid Thermal Processing (RTP) & IR Annealing
Our fused quartz plates pair with Kavri short-wave and carbon fiber infrared lamps in industrial annealing furnaces. Acting as transparent heat-separator plates, they allow instantaneous radiant transfer to the target material while forming an airtight barrier that protects filaments from corrosive atmospheric gases.
Solar Photovoltaic & Battery Thermal Testing
Korea Institute of Energy Research (KIER) and regional secondary cell testing labs utilize Kavri thick fused quartz plates ($10\text{--}50\text{ mm}$) as explosion-proof, thermally shock-resistant containment shields for high-temperature battery safety burn-off and degradation monitoring chambers.
Strategic Industry Forecast
Emerging Market Trends Reshaping Quartz Procurement in Daejeon
How technological transitions across the Chungcheongnam-do and Daejeon corridor are raising the performance bar for Chinese quartz glass exporters.
Expansion of the 'K-Semiconductor Belt'
With South Korea’s national roadmap connecting Pangyo, Pyeongtaek, Cheonan, and Daejeon into an interconnected semiconductor mega-cluster, procurement specialists in Daejeon are moving away from multi-tier domestic distributors to direct, verified Chinese factory-direct sourcing. Kavri’s direct supply chain removes broker markups while maintaining sub-micron dimensional tolerances on CNC-machined quartz discs.
Shift Toward Heterogeneous Advanced Packaging
As 2.5D/3D packaging and Chiplet architecture mature, packaging test facilities require oversized quartz carrier wafers ($300\text{ mm}$ and above) with extreme total thickness variation ($TTV < 2\ \mu\text{m}$) and low warpage. Kavri Quartz has expanded our double-sided chemical mechanical polishing (CMP) capacity to supply low-stress fused quartz carrier plates tailored for temporary wafer bonding.
Green Process Electrification & Low-Carbon IR Curing
Government mandates targeting carbon reduction in industrial heating have triggered a fast phase-out of traditional convection drying ovens across South Korea. Daejeon machine builders are integrating Kavri’s gold-coated short-wave and carbon fiber infrared emitters, saving up to 45% in operating electricity by heating target polymers and substrates with zero warm-up latency.
Why Partner With Kavri
Factory-Direct Purity, Donghai Supply Hub, Engineering Reliability
Kavri Quartz Product Co., Ltd. combines geographic raw material dominance with rigorous export compliance to satisfy the most demanding Korean industrial standards.
Donghai Cluster Advantage
Located in Lianyungang, Jiangsu, our plant draws directly from the world’s foremost natural silica and crystal hub, securing premier raw silica feedstock with consistent chemical consistency and zero supply interruptions.
Onsite-Verified Integrity
Verified onsite by Alibaba.com and international third-party audit agencies. With 10+ years of dedicated OEM/ODM track record and an annual capacity reaching 2.5 million USD, we operate with transparent reliability.
Precision Optical Fab
Equipped with 3 specialized production lines covering multi-axis CNC glass machining, continuous diamond core-drilling, high-precision flat-lapping, ultrasonic cleaning baths, and fire-polishing facilities.
Swift Direct Logistics
Strategically situated near Qingdao and Lianyungang ports. Fast marine and express air shipping channels directly into Incheon (ICN) and Busan (PUS), backed by full customs declaration and transit insurance.
Procurement Support
Frequently Asked Questions by Daejeon Buyers & Engineers
Clear, direct answers regarding custom drawings, export logistics to South Korea, quality certifications, and minimum order requirements.
What are the lead times and shipping routes for custom quartz plates sent to Daejeon?
We maintain streamlined logistics to South Korea. Standard sample fabrications take 5 to 7 working days. For bulk orders, manufacturing ranges between 12 and 18 days depending on polishing specifications. Air express shipments (via DHL/FedEx direct from Qingdao or Shanghai to Incheon Airport) take only 2 to 3 days to clear and reach Daedeok Innopolis. For palletized sea shipments, cargo moving from Lianyungang Port to Incheon or Busan Port takes 2 to 4 sailing days.
Do you supply official Material Safety Data Sheets (MSDS) and purity assay certificates?
Yes. Every batch of fused quartz plates supplied to Korean semiconductor or university labs is accompanied by a Certificate of Analysis (CoA) confirming $\text{SiO}_2$ purity (≥ 99.99%), ICP-OES/GDMS trace element breakdown (specifying levels of Fe, Al, Ca, Mg, Ti, Cu, and B in parts per million), RoHS compliance certification, and surface flatness interferometer reports upon request.
Can Kavri fabricate quartz plates based on custom AutoCAD/SolidWorks drawings?
Absolutely. Our production facility operates computerized CNC milling, waterjet glass cutting, and laser drilling machinery. We readily read DWG, DXF, STEP, and PDF engineering drawings. We can produce complex geometries including circular observation sight glasses, stepped shoulders, beveled edge chamfers, counterbored mounting holes, and gas inlet notches with mechanical tolerances held within ±0.05 mm.
What is the Minimum Order Quantity (MOQ) for custom quartz plates and infrared lamps?
We understand that research institutes in Daejeon frequently require small prototype batches for experimental validation. Our standard MOQ for custom cut or polished quartz plates starts at just 5 to 10 pieces. For standard catalog quartz tubes and infrared heater lamps, MOQ is typically 8 to 10 pieces, making trial runs, pilot testing, and maintenance replacement highly economical.
How do you guarantee that fragile quartz optical components arrive without damage?
We use custom multi-tier export packaging developed over 10 years of international deliveries. Each individual plate is protected with dust-free scratch-resistant film, sealed inside vacuum electrostatic bags, encased within form-fitting shock-absorbing pearl cotton (EPE foam), and then packed inside reinforced export plywood crates fitted with drop indicators and shock sensors. Our overseas breakage rate is less than 0.1%.
Which incoterms and payment terms are supported for South Korean companies?
We support standard international terms including FOB (Qingdao/Shanghai/Lianyungang), CFR, CIF (Incheon/Busan), EXW, and door-to-door DDP (Delivered Duty Paid), where our logistics team handles Korean import clearance, custom tariffs, and delivery straight to your laboratory gate. Payment is supported via T/T telegraphic transfer, Wire, and Letter of Credit (L/C).
Ready to Engineer Your Fused Quartz Substrates?
Whether you require standard optical windows, custom JGS1 vacuum viewports, or tailored infrared emitters for Daejeon research facilities, our engineering group provides drawing reviews, formal quotation sheets, and DDP shipping schedules within 4 hours.