Phosphoric Acid EL Grade (H3PO4 EL)

Description

1. Product Overview

Phosphoric Acid EL Grade (H₃PO₄ EL) is a high-purity, electronics-grade wet chemical engineered for ultra-trace metal ion content and particulate control, specifically designed for critical semiconductor and advanced display manufacturing processes. Its primary industrial use lies in wafer cleaning, selective etching, and chemical mechanical planarization (CMP) post-treatment, where sub-ppm contamination directly dictates device yield. The key value proposition is enabling defect-free <10nm node fabrication through guaranteed batch-to-batch ionic purity. As the global electronics industry transitions to smaller geometries and compound semiconductors, securing a reliable EL-grade phosphoric acid supply is strategically essential to prevent production halts and performance degradation.

2. Key Specifications & Technical Characteristics

• Chemical Composition: Orthophosphoric acid (H₃PO₄) with deionized water balance.

• Purity Grade: EL (Electronic Grade) – exceeding SEMI C36-1125 standards.

• Assay (H₃PO₄): 85.0% – 86.0% (w/w).

• Trace Metals (by ICP-MS, each element): < 1 ppb for critical elements (Na, K, Fe, Cu, Zn, Al, Cr, Ni); total metals < 10 ppb.

• Chlorides (Cl⁻): ≤ 0.1 ppm.

• Nitrates (NO₃⁻) & Sulfates (SO₄²⁻): ≤ 1 ppm each.

• Particle Count: ≤ 20 particles/mL for ≥ 0.2 µm; ≤ 5 particles/mL for ≥ 0.5 µm.

• Physical Form: Clear, colorless, non-volatile viscous liquid; density ~1.685 g/mL at 25°C.

• Packaging Options:

  • 20 L single-use polyethylene cube (foil-encased)

  • 200 L HDPE drum with dual-seal liner (cleanroom filled)

  • 1,000 L IBC with nitrogen overlay

  • Custom ISO tank (stainless steel 316L with electropolished interior)

• Shelf Life: 24 months from date of manufacture when stored in original unopened container at 15°C–30°C, away from direct sunlight and freezing.

3. Core Industrial Applications

• Primary Industries: Semiconductor fabrication (wafer fabs), flat panel display (FPD) manufacturing, photovoltaic cell production (PERC/topcon), and specialty electronic chemical blending.

• Operational Use Cases:

  • *Wafer cleaning (RCA SC-2 alternative):* Removes residual aluminum and photoresist ash without metallic re-deposition.

  • Selective wet etching of Si₃N₄ vs. SiO₂ – provides etch rate ratio >30:1 with sub-0.5% uniformity.

  • CMP post-cleaning: Neutralizes alkaline slurry residues on copper and barrier layers.

• Performance vs. Alternatives: EL grade delivers 100x lower trace metal contamination than industrial-grade or even ACS-grade acids. Proprietary filtration eliminates surface-defect-causing particles, improving die yield by 3–8% compared to standard semi-grade.

• Efficiency Advantage: Higher bath lifetime due to lower impurity catalyst residues (e.g., Fe, Cu) that normally accelerate bath decomposition, reducing chemical change-out frequency by up to 25%.

4. Competitive Advantages

• Quality Consistency: ISO 9001:2025 certified production with SPC-controlled lines; each lot accompanied by ICP-MS certificate of analysis (COA) showing 23 trace elements at sub-ppb levels.

• Supply Reliability: Dual-sourced purified feedstocks and three geographically dispersed filling facilities (Asia, Europe, North America) to mitigate force majeure risks.

• Logistics Capability: Temperature-controlled supply chain with real-time IoT tracking for drums and isotanks; expedited 48-hour emergency shipments available for strategic accounts.

• Price Competitiveness: Direct-from-manufacturer model eliminates distributor markup for volumes above 20 MT; contract pricing with fixed quarterly adjustments.

• Sustainability & Compliance: REACH and RoHS compliant; zero PFAS used in purification process; returnable packaging program reduces single-use plastic by up to 70% for IBC/isotank clients.

• Technical Support: Dedicated field application engineers for bath management, etch rate optimization, and contamination troubleshooting; full Material Safety Data Sheet (MSDS) and handling protocols included.

5. Commercial & Supply Information

• Minimum Order Quantity (MOQ): 20 metric tons (MT) – single product, single grade.

• Loading Capacity (per 20FT container):

  • 20 MT net weight (using IBC totes or 200L drums on pallets, stowed for ≤18.5 MT max gross weight limitation; actual net phosphoric acid content depends on packaging).

  • Typical configuration: 80 x 200L drums = 16,000 L ≈ 26.96 MT gross weight → compliant via specialized 20FT high-cube with reinforced floor (check local road limits).

  • Preferred bulk option: ISO tank (22–24 MT net per tank), loaded directly at our plant gantry.

Note: Certificate of Analysis (COA) provided at no charge with each shipment. Lead time: 14–21 days for first order; 7 days for repeat contract buyers.