Explore our certified fused quartz apparatus engineered for aggressive wet chemistry, ultra-high thermal resistance up to 1450°C, and zero-particulate semiconductor etching applications.
In modern microelectronics, MEMS, and photovoltaic manufacturing, wet chemical etching is a decisive stage determining chip yields and electrical uniformity. A quartz etch tank serves as the critical containment vessel for aggressive acid chemistries—including hydrofluoric acid (HF) in dilute oxide etch (BOE) configurations, boiling phosphoric acid ($H_3PO_4$ at 160°C–180°C) for selective silicon nitride stripping, and piranha mixtures ($H_2SO_4 + H_2O_2$) operating at elevated exothermic thresholds.
Unlike polymer alternatives such as PTFE or PVDF, which suffer from permeation, dimensional deformation at elevated temperatures, and thermal boundary degradation, synthetic fused quartz (amorphous silicon dioxide, SiO₂) provides unmatched chemical inertia and structural rigidity. Our tanks are engineered using high-purity natural quartz sand sourced directly from the crystal clusters of Donghai, processed under continuous electric fusion and vacuum refining to achieve purity levels reaching 99.999% SiO₂ with total metallic impurities below 5 ppm.
| Performance Parameter | High-Purity Fused Quartz (Vulra) | Standard Borosilicate 3.3 Glass | PTFE / PFA Fluoropolymer | Silicon Carbide (SiC) |
|---|---|---|---|---|
| Continuous Max Operating Temp | 1100°C (Short peak: 1450°C) | 450°C – 500°C | 200°C – 260°C | 1400°C – 1600°C |
| Thermal Expansion Coeff. ($\alpha$) | $5.5 \times 10^{-7} \text{ K}^{-1}$ (Virtually zero) | $33 \times 10^{-7} \text{ K}^{-1}$ | $1000 \times 10^{-7} \text{ K}^{-1}$ (High creep) | $40 \times 10^{-7} \text{ K}^{-1}$ |
| Hot Phosphoric Acid ($H_3PO_4$ 180°C) | Negligible etch rate (<0.1 nm/min) | Surface hazing & leaching | Material swelling over time | Chemically inert |
| Trace Ion Purity Level | 99.99% – 99.999% SiO₂ | Contains Boron, Sodium, Alumina | Trace organic carbon extraction | High purity (CVD grades) |
| Optical Clarity / In-situ Inspection | High transparency (>90% UV-Vis) | Standard visual clarity | Opaque / Milky translucent | Completely opaque black/grey |
The Republic of Moldova, anchored by the industrial and technological center of Chișinău, is witnessing a decisive resurgence in precision mechatronics, automotive electronics, and specialized semiconductor research. Driven by institutions such as the Technical University of Moldova (UTM), the National Center for Materials Study and Testing (NCMST), and innovation hubs embedded within Free Economic Zone "Bălți" (subzones across Chișinău), local engineers require laboratory- and production-scale wet etching containment that complies with European semiconductor benchmarks.
For high-tech facilities located along Str. Studenților, U industrial parks, or within the Tracom Economic Zone, sourcing quartz etch tanks with fast turnaround and uncompromised purity has historically posed logistics hurdles. Lianyungang Vulra Quartz Products Co., Ltd. fills this gap by providing drawing-based OEM/ODM direct factory supply to Chișinău. Whether your operations involve stripping photoresist layers, isotropic silicon etching, or pilot-scale solar cell texturing, our certified custom vessels ensure process reproducibility without cross-contamination.
Tailored tank designs adapted to the rigorous chemical engineering workflows in Chișinău R&D centers, pilot fabrication lines, and university cleanrooms.
Engineered quartz tanks integrated with quartz reflux condensing lids and immersion heater ports. Operating continuously at 160°C–180°C to selectively strip silicon nitride ($Si_3N_4$) layers while maintaining exceptional selectivity over silicon oxide.
Flawless optical-grade fused quartz bottoms designed for transmission of megasonic acoustic fields (800 kHz – 1.2 MHz). Utilized in SC-1 and SC-2 RCA cleans to dislodge sub-micron particulates without tank cavitation pitting.
Flame-polished, stress-relieved quartz vessels calibrated for predictable, ultra-low isotropic etching rates in diluted HF and ammonium fluoride buffers, optimizing oxide thickness etching for gate-dielectric preparation.
Lianyungang Vulra Quartz Products Co., Ltd. operates an integrated quartz fabrication infrastructure in Jiangsu Donghai Economic Development Zone. Every process—from raw quartz sand melting, precision flame-lathe bench fabrication, five-axis CNC cold machining, ultrasonic chemical cleaning, to polariscope internal stress inspection—is verified on-site by TÜV Rheinland.
CE Directive Compliant
RoHS Certified Non-Hazardous
TÜV Rheinland Assessed
Dimensional Accuracy: ±0.2 mm to ±0.5 mm per drawing
Weld Integrity: 100% helium leak testable & flame polished
Annealing Regimen: 1150°C soaking with ramped cool-down
Cleanroom Packing: Class 1000 double PE vacuum sealing
Get CatalogStrategic shifts in precision glass sourcing across Moldova and bordering European manufacturing hubs.
Engineering teams in Chișinău are increasingly bypassing multi-layer distribution channels in Central Europe. Sourcing directly from verified OEM manufacturers allows for low-volume (1 pc MOQ) customized tanks with lead times reduced by up to 40%.
Moldova’s integration with the EU trade zone requires strict conformity with CE, RoHS, and chemical traceability. Procuring quartz tanks backed by third-party verified spectrometer impurity certificates (ICP-MS) has transitioned from an option to a mandatory standard.
Facilities across Chișinău's industrial sectors are revamping legacy wet benches to handle larger wafer formats (from 100mm to 150mm/200mm). Custom-welded quartz tanks with customized flanging and drainage spigots allow drop-in retrofits without rebuilding wet bench frames.
Clear technical answers to help process engineers and procurement teams in Moldova specify, import, and maintain high-purity quartz etch tanks.
Whether you require a one-off custom replacement etch tank, a high-purity wafer carrier boat, or an entire cleanroom quartzware inventory, Vulra Quartz delivers drawing-accurate precision direct from our audited manufacturing base.
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