Explore standard, oversized, and engineered quartz plates, rings, boats, and precision profiles.
A rigorous examination of trace elemental purity, hydroxyl radical (OH⁻) concentrations, and thermal shock dynamics.
By using synthetic chemical precursor gasification or refining ultra-pure natural quartz granules, our fused quartz rods maintain total metallic impurity metrics (Al, Fe, Ca, Mg, Na, K, Li) well below 8.0 ppm, preventing contamination during wafer diffusion and epitaxial growth.
With an extremely low coefficient of thermal expansion (CTE ≈ 5.5 × 10⁻⁷ /°C), fused quartz rods withstand severe thermal shocks. Samples heated to 1,200 °C can be quenched in cold water without microscopic cracking, spalling, or structural fatigue.
We tailor hydroxyl radical contents (from dry electrical fusion < 5 ppm OH⁻ for high-temperature creep resistance up to flame fusion 150–250 ppm OH⁻ for optimized deep UV optical transmission) to match specific operating atmospheres.
| Physical / Chemical Parameter | High-Purity Natural Quartz Rod | Semiconductor Grade Synthetic Silica | Testing & Qualification Protocol |
|---|---|---|---|
| SiO₂ Purity Level | ≥ 99.995% (4N5) | ≥ 99.9999% (6N) | ICP-MS Spectroscopic Assay |
| Hydroxyl (OH⁻) Concentration | < 15 ppm – 200 ppm (Grade Tuned) | < 1.0 ppm (Ultra-Dry) or > 1,000 ppm | FTIR Infrared Absorption |
| Softening Point (°C) | 1,683 °C | 1,650 °C – 1,710 °C | ASTM C338-93 Dilatometry |
| Annealing Point (°C) | 1,215 °C | 1,180 °C | ASTM C336-71 Viscosity Test |
| Coefficient of Thermal Expansion (CTE) | 5.5 × 10⁻⁷ / K (20 °C – 320 °C) | 5.1 × 10⁻⁷ / K (20 °C – 320 °C) | Interferometric Dilatometry |
| Dielectric Strength (20 °C) | 25–40 kV/mm | 35–45 kV/mm | IEC 60243-1 High Voltage Test |
Deploying fused quartz rods into high-stress thermal, chemical, and optical systems across global sectors.
Precision-drawn quartz rods are CNC-slotted and flame-welded to fabricate wafer boats, vertical furnace pedestals, wafer push-pull rods, and cantilever transfer shafts used in LP-CVD, diffusion, and ALD chambers.
Ultra-dry quartz rods serve as core material and handle rods during Modified Chemical Vapor Deposition (MCVD) and Vapor Axial Deposition (VAD). Low hydroxyl content prevents optical attenuation in telecom transmission bands.
Fused silica rods act as infrared light guides, thermocouple protection sheaths, and furnace sight glasses. High transparency in the near-infrared spectrum enables accurate optical pyrometer monitoring without mechanical deflection.
In Czochralski (CZ) monocrystalline silicon furnaces, quartz support rods maintain mechanical equilibrium at 1,420 °C under corrosive molten silicon vapor, resisting premature crystallization and deformation.
Mitigating supply risks with certified traceability, technical documentation, and cross-border engineering support.
All finished fused quartz rods undergo multi-stage HF/HNO₃ acid etching in an ISO Class 5/6 cleanroom environment to eliminate iron and sodium residues, followed by vacuum bagging to prevent recontamination during international sea and air transit.
Our raw quartz minerals and manufactured components comply fully with EU RoHS Directives (2011/65/EU) and REACH (EC 1907/2006). Every batch is accompanied by trace-element ICP-OES/MS test certificates and material verification sheets.
Located in the Donghai quartz cluster with direct port connections to Shanghai and Qingdao, Southeast Quartz provides door-to-door DDP logistics, shock-isolated timber framing, and localized engineering coordination for international manufacturing plants.
Addressing next-decade demands in EUV lithography, plasma etch chambers, and quantum photonics.
Developing rare-earth and nitrogen-doped fused silica rods with lower fluorine and chlorine plasma etch rates, extending consumable lifetimes within dry etching tools down to 2 nm node geometries.
Transitioning from mechanical CNC grinding to hybrid ultrasonic vibration machining, allowing micro-grooving, deep drilling, and threaded fabrication on brittle quartz rods with sub-micron tolerances and crack-free surfaces.
Developing specialized quartz guide rods with micro-structured cross sections for quantum computing sensor channels, deep-space optoelectronics, and high-energy ultraviolet radiation windows.
Comprehensive engineering insights for procuring, machining, and operating fused quartz rods.
Reliable components manufactured for diffusion lines, laboratories, and extreme industrial environments.
