PTFE Wafer Cleaning Rack (3-inch & 6-inch Compatible) – NJ-HL Model by Binzhenghong
| Brand | Binzhenghong |
|---|---|
| Origin | Jiangsu, China |
| Manufacturer Type | Direct Producer |
| Product Category | Domestic |
| Model | NJ-HL |
| Pricing | Available Upon Request |
Overview
The NJ-HL PTFE Wafer Cleaning Rack is a high-purity, chemically inert handling and processing fixture engineered for semiconductor-grade silicon wafer cleaning, etching, and post-process transfer in cleanroom environments. Constructed entirely from laboratory-grade polytetrafluoroethylene (PTFE), this rack leverages the intrinsic material properties of PTFE—including exceptional chemical resistance, ultra-low metal ion leaching, thermal stability across −200 °C to +250 °C, and non-stick surface characteristics—to ensure zero contamination during critical wet-processing steps such as acid immersion (e.g., HF/HNO₃ mixtures), RCA cleaning, or solvent-based rinsing. Designed for compatibility with both 3-inch (76.2 mm) and 6-inch (150 mm) silicon wafers, the NJ-HL rack supports standardized batch handling in beakers ≥200 mL and integrates seamlessly into automated or manual benchtop wafer processing workflows common in photovoltaic cell fabrication, MEMS development, and advanced packaging R&D labs.
Key Features
- Pure white, virgin PTFE construction—no fillers, pigments, or recycled content; certified for low metallic impurity profile (ICP-MS traceable to sub-ppt levels).
- Double-row slot configuration (46 × 46 mm pitch) enabling secure vertical orientation of up to ten 4 × 20 mm test coupons—or scalable alignment for full-diameter wafers—with minimal edge contact.
- Integrated 80 mm ergonomic handle with rounded, smooth-radius termination to prevent snagging on quartz or Teflon-lined tanks.
- Zero extractables under prolonged exposure to concentrated HCl, H₂SO₄, HF, piranha solution, KOH, and organic solvents including acetone, IPA, and NMP.
- Non-wetting surface (contact angle >110° with water) eliminates residual droplet retention and ensures uniform drying without watermark formation.
- Dielectric strength >17 kV/mm and volume resistivity >10¹⁸ Ω·cm—suitable for electrostatic-sensitive processes where charge dissipation must be avoided.
Sample Compatibility & Compliance
The NJ-HL rack accommodates standard 3-inch and 6-inch silicon wafers (thickness: 200–725 µm), as well as rectangular substrates used in thin-film solar cell prototyping (e.g., CIGS, perovskite on glass). Its geometry complies with SEMI F27-0203 guidelines for wafer carrier dimensional tolerances and minimizes particle generation during insertion/removal. All units undergo rigorous pre-cleaning via ASTM D2671–19 (acid-wash validation protocol) and are packaged in ISO Class 5 (Class 100) cleanroom bags. Documentation includes CoA (Certificate of Analysis) listing ≤0.1 ppb total metallic contaminants (Al, Fe, Cr, Ni, Cu, Na, K, Ca) per ICP-MS analysis, supporting compliance with SEMI C1–1312 (specifications for PTFE components in semiconductor applications) and ISO 14644-1 Class 5 environmental control requirements.
Software & Data Management
As a passive hardware component, the NJ-HL rack requires no embedded firmware or software interface. However, it is fully compatible with industry-standard process documentation systems including electronic lab notebooks (ELNs) such as LabArchives and Benchling, and manufacturing execution systems (MES) like Siemens Opcenter Execution (formerly Camstar). Batch-specific usage logs—including rack ID, cleaning cycle count, acid exposure duration, and associated wafer lot numbers—can be tracked manually or integrated via barcode/RFID tagging (customizable upon request). Traceability aligns with FDA 21 CFR Part 11 requirements when paired with validated ELN entries, supporting GLP/GMP audit readiness in regulated photovoltaic module qualification labs.
Applications
- Batch acid etching of Si wafers in HF:HNO₃ or BOE solutions for surface texturing and native oxide removal.
- RCA-1 (NH₄OH:H₂O₂:H₂O) and RCA-2 (HCl:H₂O₂:H₂O) cleaning sequences in front-end-of-line (FEOL) process development.
- Post-deposition rinse and dry staging for ALD/CVD-grown dielectrics (e.g., SiO₂, Al₂O₃) and metal layers (Ti, Ta, Cu).
- Handling of fragile heterojunction (HJT) and TOPCon wafers during wet chemical passivation steps.
- Reusable alternative to disposable plastic carriers in pilot-line solar cell manufacturing, reducing operational cost per wafer (CPPW) by >65% over 12 months.
FAQ
Can the NJ-HL rack be autoclaved?
Yes—it withstands repeated steam sterilization at 121 °C for 20 minutes without deformation or degradation, though extended cycles above 200 °C are not recommended due to potential creep under load.
Is custom geometry available for non-standard wafer sizes?
Yes—Binzhenghong offers OEM design and CNC machining services for PTFE and PFA variants, including single-slot, multi-tier, or cassette-style configurations tailored to specific tank dimensions or automation gripper interfaces.
What is the expected service life under daily use in HF baths?
When operated within specified temperature limits and inspected quarterly for microcracking or handle wear, typical service life exceeds 24 months in continuous 3-shift photovoltaic production environments.
Does the rack meet USP Class VI biocompatibility requirements?
While not formally certified for implantable medical devices, its raw PTFE resin complies with USP cytotoxicity and systemic injection test criteria, making it suitable for analytical sample preparation in pharmaceutical excipient testing labs.
