Manufactured from ultra-pure synthetic fused silica (≥ 99.99% SiO₂) and engineered to SEMI-standard tolerances for cleanroom diffusion furnaces, plasma etching, and epitaxial deposition.
Specialized serpentine heating tubes and coil geometries featuring high thermal shock resistance up to 1200°C, zero devitrification at continuous loads, and seamless flame welding.
Gas distribution rings, focus rings, and clamp assemblies coated for fluorine resistance and optimized for uniform laminar gas diffusion across 150mm to 300mm wafer stages.
Double-side polished optical quartz windows (JGS1/JGS2) with bubble-free matrix, parallel cut surfaces, and deep UV through mid-IR spectral transmission for high-temperature inspection viewports.
Engineered for Quantachrome, Micromeritics, and automotive fuel-cell / battery catalyst testing with hermetic glass-to-quartz seals, precise internal volumes, and zero outgassing.
Fire-polished or optically honed cylindrical quartz rods engineered for zero internal attenuation, high refractive stability, pyrometry thermal sensing, and laser beam transmission.
Semiconductor dummy wafers, carrier plates, and MEMS substrate discs with sub-micron surface roughness (Ra < 0.5 nm), ultra-low total thickness variation (TTV < 2 μm), and SEMI-standard flats.
Integrated multi-bore and twin-tube reactors designed for atomic layer deposition (ALD), LPCVD gas cracking, and specialized epitaxial growth in industrial cleanroom furnaces.
Heavy-wall fused quartz crucibles and chemical bath tanks for aggressive acid etching (HF, piranha cleans) and high-purity metallurgical synthesis in electronic materials processing.
A rigorous examination of trace elemental purity, slot micro-machining tolerances, and thermal stress mitigation in automotive power semiconductor processing.
In thermal oxidation, diffusion, and Low-Pressure Chemical Vapor Deposition (LPCVD) furnaces, the quartz wafer boat (or wafer carrier) is subjected to the most hostile processing conditions in microelectronics manufacturing. Exposed to continuous temperatures up to 1150°C, severe thermal ramping spikes (> 15°C/min), and corrosive precursor chemistries (including silane, ammonia, and hydrochloric acid gas), standard commercial glass immediately succumbs to thermal shock, structural distortion, or heavy metal contamination.
Zunex Quartz manufactures custom horizontal and vertical quartz boats constructed exclusively from high-purity synthetic fused silica and electro-fused natural quartz (≥ 99.995% SiO₂ purity). By strictly constraining alkali metal impurities (Lithium, Sodium, Potassium < 0.1 ppm) and transition metals (Iron, Copper, Nickel < 0.05 ppm), our wafer carriers prevent the catastrophic thermal migration of mobile ions into critical silicon and silicon carbide (SiC) lattice gates—a fatal defect mechanism that cripples transistor switching efficiency and automotive power inverter yields.
Wafer slippage, micro-scratching, and edge chipping are prime drivers of cleanroom yield loss. Traditional flame-cut slots often exhibit uneven micro-grooves and residual thermal hoop stresses that induce fracture propagation during rapid furnace insertion and withdrawal cycles. Zunex Quartz deploys advanced multi-axis CNC diamond grinding and non-contact CO₂ laser slotting to fabricate boat profiles with slot width tolerances held strictly within ±0.03 mm and pitch pitch-to-pitch accuracy of ±0.05 mm.
Each slot geometry—whether V-groove, contoured flat, or dual-pitch design for SEMI standard 100mm, 150mm, 200mm, and 300mm wafers—undergoes controlled chemical fire-polishing. This eliminates sub-surface micro-fractures without altering the dimensional plane, ensuring perfectly parallel wafer seating, zero thermal bridging, and minimized contact surface tension during critical diffusion runs.
| Thermal / Physical Property | Fused Quartz (Grade JGS2) | Synthetic Fused Silica (JGS1) |
|---|---|---|
| SiO₂ Purity (Mass Fraction) | ≥ 99.99% | ≥ 99.9999% |
| Hydroxyl (OH⁻) Content | < 30 ppm (Low OH available) | ~ 150 – 1200 ppm |
| Density @ 20°C | 2.20 g/cm³ | 2.201 g/cm³ |
| Coeff. of Thermal Expansion (CTE) | 5.5 × 10⁻⁷ / °C | 5.2 × 10⁻⁷ / °C |
| Softening Point | 1683 °C | 1730 °C |
| Devitrification Onset @ 1100°C | > 400 continuous hours | > 1200 continuous hours |
| Dielectric Strength @ 20°C | 25 – 40 kV/mm | 40 – 50 kV/mm |
| Trace Impurity (Typical ICP-MS) | Standard Grade (ppm) | Electronic Cleanroom Grade (ppm) |
|---|---|---|
| Aluminum (Al) | ≤ 14.0 | ≤ 6.0 |
| Calcium (Ca) | ≤ 0.6 | ≤ 0.3 |
| Iron (Fe) | ≤ 0.2 | ≤ 0.05 |
| Sodium (Na) | ≤ 0.7 | ≤ 0.1 |
| Potassium (K) | ≤ 0.6 | ≤ 0.1 |
| Copper (Cu) | ≤ 0.05 | ≤ 0.01 |
| Total Heavy Metal Content | < 20 ppm | < 8 ppm |
Metro Detroit and Southeast Michigan have evolved far beyond conventional assembly lines into an advanced epicenter for wide-bandgap (SiC/GaN) semiconductors, automotive battery management sensors, and university nanofabrication.
Detroit's Tier-1 automotive electrification programs demand 800-volt Silicon Carbide (SiC) MOSFET inverter stages. High-temperature epitaxy and gate dielectric furnaces run above 1150°C—conditions where our heavy-wall quartz boats and quartz process tubes resist sagging, devitrification, and particulate shedding under severe thermal ramping.
Automotive radar, LiDAR mirrors, and MEMS pressure sensors developed in Oakland and Wayne County research facilities require high-density slotted quartz boats. Our micron-honed slots eliminate wafer vibration and edge chipping during high-speed vacuum wafer transfers in robotic cassette stations.
Serving institutional facilities across Ann Arbor and Detroit, including university research centers (Lurie Nanofabrication Facility) and battery tech centers. We provide prototype quartz boats, custom BET quartz sample tubes, and twin-tube reactors engineered directly from custom STEP/DWG drawings for small-batch research runs.
With billions of dollars injected into the Midwest semiconductor supply chain via the federal CHIPS and Science Act and Michigan state initiatives, tier-1 automakers and automotive silicon fabricators are actively re-evaluating their quartz consumable lifecycles. Traditional OEM supply chains often lock fab managers into rigid 26-to-38 week lead times with exorbitant replacement premiums for quartz boats, furnace process tubes, and CVD bells.
Zunex Quartz bridges this gap for the Detroit market. By maintaining a vertically integrated raw material foundation in Donghai County (the world's crystal and silica capital) combined with direct CAD-to-CNC laser micro-machining, we supply Detroit cleanrooms with fully interchangeable, drop-in replacement wafer boats in 3 to 5 weeks delivery lead time, verified by full coordinate measuring machine (CMM) dimensional reports and optical spectrographic purity certificates.
Direct manufacturing transparency backed by verifiable trade records, in-house laser micro-fabrication, and end-to-end quality inspection.
Located in Donghai County, Jiangsu, our facility directly refines and sources quartz ingot feedstock, ensuring complete batch-to-batch traceability of elemental purity, bubble class (Class 0 according to DIN 3140), and low hydroxyl characteristics.
Our workshop combines hot-flame hydrogen-oxygen forming with non-contact laser slotting, multi-axis CNC contour milling, and optical mechanical polishing. Every slot angle, wafer cradle notch, and flange face is machined to micro-tolerances.
Backed by a 100% verified response rate, average quote reply under 2 hours, and a 43% repeat purchase rate from industrial buyers worldwide. Every order is encased in specialized shock-proof foam and palletized wooden crates for zero-breakage DTW air freight transit.
Prior to export crating, every quartz boat and carrier undergoes an exhaustive 4-stage quality validation: (1) Laser CMM Slot Inspection measuring pitch, width, depth, and tilt orthogonality; (2) Polariscopic Stress Analysis to identify and eliminate internal residual strain fields; (3) Ultrasonic Cleanroom HF Degreasing followed by 18.2 MΩ·cm deionized water cascade rinsing; (4) Vacuum Double-Polyethylene Bagging in a Class 1000 clean air environment, ensuring zero organic or particulate contamination upon receipt in Detroit cleanrooms.
Clear, direct answers regarding custom drawings, Silicon Carbide processing compatibility, logistics to Detroit (DTW), and quality warranties.