Featured batch production units configured for ultra-clean diffusion, vertical CVD, and laboratory annealing furnaces.
Strategic deployment within Greater Nagoya's automotive power semiconductor and aerospace manufacturing clusters.
The Chūkyō Industrial Area surrounding Nagoya is the global epicentre for next-generation electric vehicle powertrains. The transition to 800V silicon carbide (SiC) and gallium nitride (GaN) power modules requires high-temperature furnace tubes operating stably at 1,150°C to 1,300°C with trace metal contaminations below 5 ppb.
Centred around Nagoya’s aerospace cluster (Mitsubishi Heavy Industries, Subaru aerospace divisions), CVD and CVI vacuum furnace tubes serve as reaction vessels for dense ceramic matrix composites (CMCs) and high-modulus carbon fibre graphitization under sub-atmospheric pressure.
Collaborative research at Nagoya University, AIST Chubu, and Toyota Central R&D Labs requires custom-dimensioned fused silica reactor vessels capable of cyclic rapid thermal processing (RTP) without micro-crack propagation or hydroxyl (OH) de-vitrification.
A rigorous metallurgical comparison of natural fused quartz versus synthetic fused silica in demanding high-temp applications.
For industrial manufacturers in Aichi and Mie prefectures running 24/7 diffusion lines, premature tube collapse occurs primarily through cristobalite nucleated by surface alkali metal contamination (Na, K, Li, Ca). Our fused quartz furnace tubes undergo automated multistage ultrasonic acid leaching (HF & HNO₃) followed by 1,150°C vacuum thermal pre-annealing, keeping total alkali trace levels below 1.2 ppm to ensure extended MTBF (Mean Time Between Failures).
| Property / Metric | High-Purity Natural Quartz (JCS-Grade) | Synthetic Fused Silica (Opto-Grade) | Standard Laboratory Borosilicate |
|---|---|---|---|
| SiO₂ Content (%) | ≥ 99.995% | ≥ 99.9999% | ~ 81% |
| Max Short-Term Temperature | 1,280 °C | 1,350 °C | 500 °C |
| Softening Point | 1,683 °C | 1,730 °C | 820 °C |
| Thermal Shock Resistance | Rapid plunge 1,100°C → 20°C water without crack | Plunge 1,150°C → 20°C water without crack | Fractures above ΔT 150°C |
| OH Content (ppm) | ≤ 15 - 30 ppm (Electric-fused) | ≤ 1 ppm (Dry) to 1,000 ppm | N/A |
| Application Focus in Nagoya | LPCVD, Oxidation, SiC/Si Wafer Anneal | Excimer Laser Lithography & Optical Metrology | Low-temp chemical discharge only |
Combining primary crystal feedstock advantages with high-precision CNC lathe hot-working.
Situated in Donghai County—the global nucleus of quartz processing—we maintain uninterrupted access to high-grade crystalline feedstock, shielding Japanese end-users from global supply bottlenecks.
Continuous electric-vacuum melting shafts produce seamless tubes up to OD 650 mm with uniform wall thicknesses within ±0.15 mm, compatible with vertical 300 mm wafer furnaces.
Direct expedited maritime links from Lianyungang/Shanghai to the Port of Nagoya enable transit times under 72 hours, backed by custom shock-absorbent nitrogen-purged wooden packaging.
Direct factory engagement bypasses Japanese regional trading intermediaries (Shosha), significantly decreasing consumable CAPEX for diffusion lines.
Precision-ground boats, flow cells, lamp holders, and customized chamber tooling designed to exact drawings.
Comprehensive inspection protocols satisfying Tier-1 automotive and semiconductor audits in Aichi Prefecture.
Every flanged or end-sealed furnace tube undergoes vacuum testing using Pfeiffer helium leak detectors. Leak rates are certified below 1×10⁻⁹ mbar·l/s, preventing atmospheric ingress during sensitive CVD dopant cycles.
Thermal processing on automated annealing lehrs relieves internal stress below 10 nm/cm optical retardation per JIS R3203 guidelines, preventing spontaneous shatter during rapid thermal cycles.
Orders destined for Japan include CMM geometric verification, 3D surface roughness (Ra) records, ICP-MS elemental chemical analysis reports, and RoHS/REACH compliance declarations.
Addressing thermal performance, dimensional customisation, and shipping protocols for the Japanese industrial market.
Whether you require prototype quartz reactors for research in Nagoya or volume diffusion furnace tubes for wafer fabs, our engineering team provides direct manufacturability analysis within 24 hours.
