Sanotac BM-100 Continuous-Flow Bellows Pump (Pneumatic & Electric Drive) for Ultra-High-Purity Electronic Chemical Delivery

Overview

The Sanotac BM-100 is an electrically actuated, servo-controlled continuous-flow bellows pump engineered for ultra-high-purity fluid handling in semiconductor front-end manufacturing, advanced battery production, and precision microfluidic dispensing applications. Unlike diaphragm or peristaltic pumps, the BM-100 utilizes a hermetically sealed, metal-free PTFE/PFA bellows assembly driven by a precision lead-screw mechanism. This design eliminates dynamic seals, sliding interfaces, and rotating shafts—thereby preventing particle generation, external gas ingress, and chemical leakage. Its operation relies on controlled axial compression and expansion of the fluoropolymer bellows to achieve positive displacement with minimal pulsation (<2% peak-to-peak flow variation under steady-state conditions). The pump is specifically validated for use with aggressive chemistries including hydrofluoric acid (HF), tetramethylammonium hydroxide (TMAH), photoresists, electrolyte solvents (e.g., EC/DMC/LiPF₆), and ultrapure water (UPW), meeting material compatibility requirements defined in SEMI F57 and ASTM D5127 for electronic-grade chemical transfer systems.

Key Features

• Metal-free wetted path constructed entirely from PTFE, PFA, and specialty ceramic components—ensuring zero metallic leaching and full compliance with SEMI C1–C35 purity classifications.
• Servo-motor-driven lead-screw actuation enables digital volumetric control with ±1% volumetric accuracy across the full 1.0–100.0 mL/min range and 0.1 mL/min incremental resolution.
• No dynamic seals or sliding parts in contact with process fluid—eliminating wear-induced particulates and enabling >10⁷ duty cycles without performance degradation.
• Integrated real-time pressure monitoring with programmable overpressure cutoff (≤0.5 MPa threshold) and automatic fault logging via Modbus register mapping.
• Multi-protocol digital interface (USB, RS232, RS485) supporting integration into factory automation systems compliant with SECS/GEM and EDA standards.
• Low-pulsation continuous flow mode (CV < 2%) and discrete dispense mode (single-shot or multi-shot sequencing) configurable via embedded firmware or host controller.

Sample Compatibility & Compliance

The BM-100 is qualified for handling Class 1–5 electronic chemicals per SEMI C12, including photoresists (g-line/i-line/EUV), etchants (HF, HNO₃/CH₃COOH blends), strippers, and Li-ion battery electrolytes. Its all-fluoropolymer flow path meets USP Class VI biocompatibility and ISO 10993-5 cytotoxicity requirements for non-contact pharmaceutical intermediate transfer. The pump’s architecture supports GMP-compliant installation in cleanrooms (ISO Class 3–5), with validation documentation available for IQ/OQ protocols aligned with FDA 21 CFR Part 11 data integrity requirements. Pressure and flow calibration certificates traceable to NIST standards are provided upon request.

Software & Data Management

Sanotac provides the BM Control Suite—a Windows-based configuration and monitoring application supporting real-time flow/pressure trending, recipe management (up to 99 user-defined programs), and audit-trail-enabled event logging. All operational parameters—including dispense volume, cycle count, pressure events, and communication errors—are timestamped and stored with SHA-256 hashing for tamper-evident records. When deployed in networked environments, the pump supports OPC UA server functionality for seamless integration into MES platforms such as Siemens Opcenter, Rockwell FactoryTalk, or Applied Materials EnduraConnect. Firmware updates are delivered via signed binary packages with cryptographic verification.

Applications

• Semiconductor photolithography: Precise, low-particulate delivery of photoresist during spin-coating and edge-bead removal (EBR) processes.
• Wet etch and clean modules: Metered circulation of HF-based chemistries in single-wafer processing tools with closed-loop concentration control.
• Lithium-ion battery manufacturing: Accurate electrolyte filling into prismatic, pouch, and cylindrical cells with sub-milligram repeatability.
• Advanced packaging: Underfill and encapsulant dispensing for fan-out wafer-level packaging (FOWLP) with pulse-width modulation capability.
• R&D microdispensing: Controlled reagent addition in combinatorial chemistry reactors and microfluidic assay development platforms.

FAQ

What materials are in direct contact with the fluid?

PTFE bellows body, PFA inlet/outlet tubing fittings, and alumina-reinforced ceramic check valves—no stainless steel, elastomers, or adhesives are used in the wetted path.
Can the BM-100 handle hydrogen fluoride (HF) at 49% concentration?

Yes—validated for continuous operation with ≥49% aqueous HF at temperatures up to 40°C and pressures ≤0.35 MPa; optional Hastelloy-free ceramic valve kits available for extended service life.
Is the pump suitable for GMP-regulated pharmaceutical intermediate transfer?

Yes—the absence of lubricants, metal ions, and seal degradation mechanisms satisfies Annex 1 (EU GMP) and USP requirements for aseptic fluid handling when installed with appropriate environmental controls.
How is flow accuracy verified and maintained over time?

Each unit undergoes gravimetric calibration using certified mass standards (±0.001 g resolution) at three flow points (10%, 50%, 90% of max); recalibration intervals are recommended every 6 months or after 5,000 operating hours.
Does the BM-100 support remote diagnostics and predictive maintenance?

Yes—embedded vibration signature analysis and bellows stroke deviation tracking enable early detection of mechanical drift; diagnostic data is accessible via Modbus register banks or cloud-connected gateways (optional).