Optical Grade
XRD Quartz Holder Test Samples High Transmittance Clear Plate Circular Shape SJ
99.99% SiO₂ Purity
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Direct-from-Source Precision
High-Purity Quartzware & Process Tanks
Manufactured from premium Donghai natural and synthetic fused silica crystal sand. From single-piece custom pilot tanks to volume OEM components, fully inspected for microelectronic, analytical, and severe chemical duty.
Acid Circulation
Custom High Temp Corrosion Resistant Clear Quartz Pipe Twin Tube SJ 210
Dual-Pass Heat
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Process Manifold
High Purity Transparent Polished Quartz Tube Hollow High Temp Resistance
OD 5mm–800mm
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Semiconductor
Custom High Purity Quartz C-Shaped Small BET Tube Welding Bending 1100°C
Flame Welded
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99.999% Purity
High-Temp 1100°C Corrosion Resistant 99.999% Double-Tube Right-Angle Elbow
Zero-Leak Elbow
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Flanged Vessel
Single Crystal Quartz Glass Tube Flange Re-Feeder Container Vessel SJ
Ozone-Free Stock
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Tank Bottom/Walls
SJ Natural Fused Quartz Polished Plate Chemical-Resistant Laser Grade
0.5–20mm Thick
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Lab Digest Tank
High Purity Quartz Glass Ampoule Customized Lab Digest Clear Quartz Flask
Thermal Shock Res.
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Engineering Fused Quartz Wet Cleaning Tanks for Bandung's Precision Ecosystem
In precision surface engineering, silicon wafer fabrication, photovoltaic wafer texturing, and advanced materials synthesis, the cleaning and etching tank is not merely a holding basin; it is an active thermo-chemical boundary. As Indonesia expands its domestic semiconductor, electronic packaging, and advanced chemical materials footprint under national strategic plans such as Making Indonesia 4.0, the Bandung basin—anchored by internationally recognized scientific hubs like Institut Teknologi Bandung (ITB), the National Research and Innovation Agency (BRIN Bandung), and specialized electronics assembly corridors—demands high-purity chemical wet-bench infrastructure capable of surviving punishing corrosive chemistries at elevated operating temperatures.
Lianyungang Vulra Quartz Products Co., Ltd. stands as China's premier manufacturer and direct exporter of customized, high-purity fused quartz cleaning tanks, overflow cascade dump rinsers, ultrasonic megasonic wet baths, and hot acid baths configured explicitly for the unique procurement realities and technical thresholds of the Bandung manufacturing and scientific research community.
Core Engineering Standard: Every Vulra Quartz cleaning tank exported to West Java is fabricated utilizing select Grade-A high-purity fused quartz sand derived directly from the geological deposits of Donghai County, China—known globally as the crystal capital. This material offers an impurity profile containing combined transition metals (Fe, Cu, Ni, Cr, Mn, Zn) below 1.5 parts per million (ppm) and total alkali metal ion impurities (Li, Na, K) strictly governed under 2.0 ppm, eliminating the threat of interstitial substrate contamination in delicate wet benches.
1. Specialized Tank Configurations for Wet Chemical Processing
Standard industrial plastics such as Polypropylene (PP), Polyvinylidene Fluoride (PVDF), and even fluoropolymers like PFA or PTFE possess distinct operational ceilings when exposed simultaneously to concentrated oxidizers, high mechanical acoustic resonance, and sustained temperatures exceeding 130°C. Vulra Quartz engineers and manufactures three distinct categories of fused silica cleaning vessels to resolve these failure points:
Hot Acid RCA & Piranha Tanks
Fabricated with precision seam-welded optical plates or monolithic seamless molded quartz. Engineered for Piranha Solution (H₂SO₄ + H₂O₂) and SC-2 (HCl + H₂O₂ + H₂O) operations up to 180°C continuous bath temperatures without leaching trace elements or suffering micro-cracking.
Megasonic & Ultrasonic Quartz Baths
Equipped with uniform, stress-relieved bottom plates ground to flatnesses within λ/4 wave tolerances. Designed specifically to bond seamlessly with piezo-electric transducers without acoustic impedance mismatch, surviving cavitation stress across 28 kHz to 1.2 MHz frequencies.
Quick-Dump & Cascade Overflow Rinsers
Incorporates precision dual-weir cascade overflow lips, integrated high-purity DI water diffusers, and pneumatic bottom dump dump doors. Minimizes boundary-layer water stagnation and flushes chemical residues off silicon or sapphire wafers in under 15 seconds.
2. Comparative Engineering Matrix: Fused Quartz vs. Alternative Wet Bench Materials
Selecting the correct substrate for chemical containment tanks requires a rigorous balance of thermal expansion coefficients, maximum continuous service limits, chemical inertness against aggressive acids, and the potential for leaching particulate contamination into sub-micron surface topographies.
| Performance Characteristic | Vulra Fused Quartz (SiO₂) | PFA / Virgin PTFE | Borosilicate 3.3 Glass | PVDF (Fluoropolymer) |
|---|---|---|---|---|
| SiO₂ / Material Purity | 99.99% – 99.999% | Fluoropolymer resin | ~80.5% SiO₂ + B₂O₃/Alkalies | Homopolymer PVDF |
| Continuous Service Temp | 1100 °C (Short term 1450 °C) | Up to 200 °C | Up to 450 °C | Up to 120 °C |
| Coefficient of Thermal Expansion (CTE) | 5.5 × 10⁻⁷ / °C (Extremely Low) | 100–200 × 10⁻⁶ / °C | 3.3 × 10⁻⁶ / °C | 120 × 10⁻⁶ / °C |
| Resistance to Hot H₂SO₄ / Piranha | Superior (Zero degradation) | Good (Permeation risk) | Moderate (Surface ion exchange) | Poor at >100°C |
| Resistance to Hydrofluoric Acid (HF) | Requires replacement cycles | Impervious | Rapid etching / failure | Resistant |
| Acoustic / Ultrasonic Transmission | Near 100% efficient coupling | Dampens / absorbs energy | High brittle resonance risk | Heavy acoustic attenuation |
| Ionic Leaching Risk | Zero trace metals (<1.5 ppm) | Fluoride / organic extractables | High Sodium/Boron leaching | Additive outgassing |
Localized Application Scenarios in Greater Bandung and West Java
Bandung holds a distinguished status within the Republic of Indonesia. Situated at an elevation of over 700 meters above sea level, the Bandung basin has evolved from its historical legacy in communication technology and textiles into Indonesia's undisputed center for academic-led advanced research, national laboratory testing, precision micro-optics development, and high-value niche electronic assembly. Vulra Quartz tanks provide direct operational solutions across these specialized local sectors:
ITB & University Research Cleanrooms
Institutes such as the Institut Teknologi Bandung (ITB) Center for Microelectronics and Nanotechnology rely on Vulra high-transmittance fused quartz sample holders, C-shaped BET gas sorption quartz tubes, and welded acid-cleaning tanks for thin-film deposition substrate preparation, optical window cleaning, and high-vacuum thermal treatment.
BRIN Bandung Materials & Nuclear Testing
National Research and Innovation Agency laboratories in Bandung utilize Vulra 99.999% single-crystal quartz flanges, closed-end combustion vessels, and heavy-wall corrosion-resistant quartz tanks for rigorous radiochemical separation, high-temperature calcination, and electrochemical cell isolation.
West Java Photovoltaic & Sensor Assembly
Regional pilot lines manufacturing crystalline silicon photovoltaic cells and infrared/UV optical sensors employ Vulra custom twin-tube quartz heaters and cascading overflow tanks for wet chemical texturing, wafer de-sawing residue removal, and multi-stage RCA decontamination cycles.
Market Growth Trends Across the Bandung & West Java Corridor
The industrial dynamic across West Java is undergoing a generational shift. While the primary industrial estates in Karawang, Cikarang, and Bekasi handle massive volume automotive assembly and consumer appliances, Greater Bandung functions as the advanced prototyping brain, pilot engineering incubator, and analytical testbed of Indonesia. Key market drivers accelerating the shift to high-purity quartz cleaning systems include:
- Semiconductor Supply Chain Onshoring: Under the Indonesian Ministry of Industry's technological roadmap, domestic universities and venture-backed research laboratories are mandated to localize wafer-level packaging, MEMS sensor prototyping, and IC post-fab inspection. This transition strictly outlaws common borosilicate labware due to heavy alkali metal ion out-diffusion.
- Replacement of Obsolete PFA Tanks Under High Heat: Industrial processors running hot sulfuric-peroxide mixtures (Piranha) at 140°C–170°C have faced recurring container wall warpage and micro-leaks in polymer baths. Bandung facilities are actively refitting wet benches with rigid, zero-creep fused silica tanks.
- Infrastructure Connectivity (Whoosh High-Speed Rail & Cisumdawu): The opening of the Jakarta-Bandung High-Speed Railway and the Cisumdawu toll road directly linking Bandung to Kertajati International Airport and the deepwater ports of northern Java has dramatically reduced logistics lead times and transit vibration risks for imported scientific glass and optical components from China.
Factory Direct From Donghai, China
Lianyungang Vulra Quartz Products Co., Ltd. operates a vertically unified production infrastructure situated directly at No. 9, Dingxin Road, Jiangsu Donghai Economic Development Zone. We bypass middlemen, ensuring that engineering cleanroom managers in Bandung receive raw material traceability, verified TÜV Rheinland quality control, and drawing-compliant hot/cold machining.
On-Site Factory Audited
CE European Standard
RoHS Compliant
Every batch undergoes rigorous vacuum-furnace de-stress annealing, laser coordinate measurement, and spectrophotometric light transmission verification before heavy-duty export packaging.
Why Bandung Buyers Choose Vulra Quartz Tanks: Five Core Differentiators
Drawing-Based Custom Engineering
Send your CAD (.dwg, .step, .pdf) files. Our master glass engineers evaluate wall-thickness ratios, acoustic wave nodes, thermal stress zones, and flange tolerances before ignition of oxy-hydrogen torches.
Monolithic & Flame-Fused Seams
We execute multi-pass oxy-hydrogen hot welding followed by automated precision grinding. Welded quartz corners achieve mechanical strength exceeding 85% of solid native quartz stock.
Zero-Stress Annealing Cycles
Every welded cleaning tank undergoes prolonged annealing in programmed electric kilns at 1150°C to completely neutralize internal stress, preventing catastrophic fractures during thermal cycling in wet benches.
Surface Acid Washing & Cleanroom Pack
Tanks receive continuous HF/DI water chemical etching to strip fire polish haze, followed by Class 100 cleanroom nitrogen drying and double-vacuum polyethylene sealing to arrive pristine at Bandung facilities.
Flexible MOQ: From 1 Single Piece
University labs and pilot lines in West Java need not purchase container-loads. We support specialized academic research with dedicated 1-piece custom prototyping alongside recurring batch production.
Export Engineered Shock-Proof Crating
Engineered for sea and air freight through Tanjung Priok or Soekarno-Hatta International Airport into Bandung, our quartzware is encased in high-density customized EPE foam and treated plywood crates.
Manufacturing Precision: Cold Machining to High-Flame Joining
Our integrated 12,000 m² facility executes every phase of quartz tank processing internally. Below are key checkpoints inside the Vulra production base:
Bandung Procurement FAQ: Technical, Chemical & Import Solutions
Clear, practical guidance compiled by our senior applications engineering team to answer the most frequent questions submitted by Indonesian lab managers, wet-bench system integrators, and academic procurement committees.
1. How does Vulra ensure quartz cleaning tanks survive transit to Bandung without breakage?
Fragile export quartz logistics is an engineering specialty at Vulra. Each cleaning tank is vacuum-wrapped in static-dissipative film, suspended inside custom CNC-cut high-density expanded polyethylene (EPE) shock absorbers within internal corrugated boxes, and then locked into treated, impact-resistant fumigated plywood crates. Crates feature tip-n-tell tilt indicators and shock sensor badges. We maintain a verified breakage-free delivery track record across air shipments directly into Jakarta (CGK) followed by overland air-cushioned freight to Bandung via the Cisumdawu/Padaleunyi expressways. In the rare event of transit damage, our maritime/air insurance provides immediate priority replacement fabrication.
2. Can your quartz cleaning tanks handle hot Piranha solution and concentrated Hydrofluoric acid (HF)?
For Piranha solution (H₂SO₄ + H₂O₂), SC-1, SC-2, nitric acid, and boiling aqua regia, our 99.999% fused silica tanks are completely inert and offer unmatched performance up to continuous bath temperatures of 180°C–200°C. For Hydrofluoric acid (HF) or Buffered Oxide Etch (BOE), quartz does react chemically (SiO₂ + 4HF → SiF₄ + 2H₂O). However, in dilute HF wafer cleaning baths (0.5%–2%), high-density fused quartz is widely utilized with known micro-rate etch wear allowances because it does not shed organic plasticizers into ultra-clean substrates. For prolonged concentrated HF containment, we recommend specialized PFA liners.
3. What import documents and trade certificates do you provide for Indonesian customs clearance?
We provide full documentation for smooth clearance through Indonesian Customs (Direktorat Jenderal Bea dan Cukai). This includes detailed Commercial Invoices, Packing Lists with precise HS Codes (HS 7017.10.00 for fused quartz laboratory and industrial apparatus), Certificate of Origin (Form E for ASEAN-China Free Trade Area preferential tariffs), CE Declaration of Conformity, RoHS Compliance Certificates, and TÜV Rheinland Factory Assessment Inspection Reports. We also coordinate with local Indonesian freight partners for DDP (Delivered Duty Paid) or CIF Jakarta/Bandung incoterms.
4. Can we customize tank dimensions, drain ports, flange lips, and sensor brackets from our CAD drawings?
Yes, 100%. Over 75% of our production is drawing-based customization. We regularly integrate flame-welded flanged quartz drain necks, quartz NPT/barbed liquid fittings, overflow serrated weir lips, immersion heater quartz sleeves, and mounting tabs for thermocouple probes. Simply email your 2D drawings (DWG/PDF) or 3D STEP models to our engineering desk. Our technicians verify dimensional feasibility, structural integrity at weld joints, and provide a clear DFM (Design for Manufacturability) review within 24 hours.
5. What is the difference between welded quartz tanks and seamless molded quartz tanks?
Welded quartz tanks are constructed by diamond-sawing high-purity optical plates, beveling joints, and torch-welding the corners using oxy-hydrogen flames with quartz filler rods. They allow infinite sizing flexibility, thick structural walls (6mm to 15mm), and custom aspect ratios without high upfront tooling costs. Seamless molded tanks are pressed or vacuum-formed from single molds; they possess rounded interior corners which are easier to clean in high-throughput production lines, but require substantial tooling investments and are restricted to standard industry dimensions (such as standard 6-inch or 8-inch wafer carrier baths).
6. How do your quartz tanks perform under megasonic or high-frequency ultrasonic transducers?
Fused quartz possesses an exceptionally high acoustic velocity and minimal internal dampening compared to plastics or composite metals. For megasonic cleaning applications (typically 800 kHz to 1.2 MHz used for sub-micron particle removal on sensitive wafers), our tanks feature double-side precision ground and polished bottom plates with strict parallelism (≤ 0.02 mm). This prevents wave distortion, hotspot cavitation pitting, and premature bonding-epoxy detachment, ensuring uniform acoustic energy transmission throughout the fluid bath.
Accelerate Your High-Purity Wet Process in Bandung
Whether you need a custom-dimensioned hot acid quartz bath for a university cleanroom, an overflow cascade rinser for a wafer fabrication line, or specialized high-temperature quartz manifolds, Vulra Quartz delivers proven Donghai craftsmanship with verified laboratory-grade purity.
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