Custom-Built Integrated 5L PTFE Acid Bath Tank by Binzhenghong

Overview

The Custom-Built Integrated 5L PTFE Acid Bath Tank is a laboratory-grade corrosion-resistant immersion vessel engineered for high-purity acid cleaning, etching, and sample conditioning in semiconductor fabrication, analytical chemistry, and materials science workflows. Constructed entirely from virgin polytetrafluoroethylene (PTFE), the tank leverages the material’s exceptional chemical inertness—resisting concentrated hydrofluoric (HF), nitric (HNO₃), hydrochloric (HCl), sulfuric (H₂SO₄), and aqua regia solutions up to 260 °C—without leaching, swelling, or surface degradation. Unlike modular or lined alternatives, this unit is manufactured as a monolithic, seamless PTFE structure with integrated wall thickness (≥8 mm) and reinforced base geometry, eliminating crevices and weld seams where contamination or acid entrapment could occur. Its design conforms to ISO 17025-aligned handling requirements for trace-metal-free sample preparation, supporting cleanroom-compatible protocols in Class 100–1000 environments.

Key Features

• Monolithic construction from USP Class VI-certified virgin PTFE—no adhesives, fillers, or secondary bonding agents
• Integrated structural geometry: flat-bottomed cylindrical form with chamfered internal corners and reinforced rim for mechanical stability during ultrasonic agitation or hotplate heating
• Standard 5L nominal capacity (inner dimensions: Ø220 mm × H140 mm); scalable volume options available upon engineering review (1–20L range)
• Optional integrated features: PTFE-coated stainless-steel support frame, dual-position lid with inert gas purge port (N₂/Ar), and recessed mounting flange for vacuum desiccator integration
• Surface roughness Ra ≤0.4 µm (as measured per ISO 4287), minimizing particle retention and enabling validated cleaning cycles per ASTM D2670

Sample Compatibility & Compliance

This PTFE bath tank is compatible with substrates including silicon wafers, quartz optics, sapphire substrates, stainless-steel fixtures, and borosilicate glassware. It meets critical compatibility criteria for ICP-MS, GDMS, and SIMS sample prep where sub-ppt metal contamination must be avoided. The PTFE resin complies with FDA 21 CFR §177.1550 for repeated food-contact use and RoHS Directive 2011/65/EU. Batch-specific Certificate of Conformance (CoC) and extractables testing reports (per USP ) are provided with each unit. The tank supports GLP-compliant documentation trails when used within validated SOPs for wafer cleaning (e.g., RCA SC-1/SC-2 sequences) and ASTM E1559 outgassing qualification.

Software & Data Management

As a passive hardware component, the tank does not incorporate embedded electronics or firmware. However, it is fully interoperable with laboratory information management systems (LIMS) and electronic lab notebooks (ELN) via standardized asset tagging (e.g., QR-coded serial labels affixed post-machining). Each unit receives a unique identifier traceable to raw-material lot, machining log, and surface inspection record—enabling full auditability under ISO/IEC 17025 clause 7.6 and FDA 21 CFR Part 11 Annex 11 data integrity requirements. Integration with thermal monitoring systems (e.g., calibrated PT100 probes mounted externally on support frames) is supported through third-party DAQ platforms (National Instruments, Keysight).

Applications

• High-purity acid digestion of geological and environmental samples prior to ICP-OES/ICP-MS analysis
• Photoresist stripping and oxide removal in microfabrication pilot lines
• Pre- and post-deposition cleaning of MEMS and thin-film optical components
• Long-duration passivation baths for surgical-grade stainless-steel instruments (ASTM A967)
• Calibration standard storage for pH and ion-selective electrodes requiring non-reactive containment

FAQ

Can the tank withstand hydrofluoric acid at elevated temperatures?
Yes—virgin PTFE maintains structural integrity in 49% HF up to 200 °C for continuous exposure; intermittent use extends safe operation to 260 °C per ASTM D471.
Is custom geometry (e.g., rectangular footprint or drain port) available?
Yes—custom tooling is supported for non-cylindrical configurations, provided minimum wall thickness and draft-angle constraints are met per PTFE machining guidelines.
Do you provide validation documentation for GMP environments?
Upon request, we supply Installation Qualification (IQ) templates, material traceability dossiers, and surface extractables test summaries aligned with EU GMP Annex 15 and USP Analytical Instrument Qualification.
What is the lead time for a custom 5L unit with lid and purge port?
Standard lead time is 12–14 working days from drawing approval; expedited production (8-day) is available with priority scheduling.