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Ammonium Sulfate (Electronic Grade) – Ultra-High Purity Chemical for Semiconductor & Microelectronics Manufacturing
Published for: Semiconductor Factories, Electronic Material Procurement, Wafer Processing Enterprises
Electronic Grade Ammonium Sulfate is an ultra-high-purity electronic chemical specially developed for the microelectronics and semiconductor industry. Different from conventional reagent grades, this product adopts ultra-purification technology to strictly control trace metal ions, particle impurities, and residual contaminants. It fully meets SEMI industry standards and is a critical auxiliary material for wafer cleaning, circuit etching, and electronic component surface treatment in high-precision semiconductor manufacturing processes.
1. Key Product Specifications
Chemical Formula: (NH₄)₂SO₄
CAS Number: 7783-20-2
Ultra-High Purity: ≥99.99%
Total Trace Metal Impurities: ≤15 ppm
Micro-Particle Control: Zero large particle contamination, ultra-low suspended solids
Appearance: Colorless transparent crystals or white uniform granules
Stability: High thermal stability, no decomposition or impurity precipitation during high-temperature processing
2. Core Advantages
Electronic-grade ammonium sulfate features extremely strict trace metal control and high cleanliness. Harmful metal ions such as iron, copper, sodium, and potassium that may cause circuit short circuits and wafer defects are strictly limited to ultra-low levels. The product has uniform solubility, no residue, and excellent oxidation resistance, which can effectively remove oxide layers and micro-contaminants on the surface of silicon wafers without damaging the precision circuit structure. Batch stability and high consistency ensure zero difference in large-scale industrial production, greatly improving the yield rate of semiconductor chips and electronic components.
3. Main Applications
Semiconductor Wafer Cleaning: Removes surface oxides, dust particles, and residual organic contaminants during wafer manufacturing to ensure wafer surface cleanliness.
IC Circuit Etching Auxiliary: Serves as an additive for etching solutions to adjust solution activity and improve etching uniformity and precision.
Electroplating for Electronic Components: Used as a conductive and stabilizing additive for precision electronic electroplating to enhance coating adhesion and flatness.
Microelectronics Surface Treatment: Applied in the surface purification and modification of circuit boards, chips, and optoelectronic devices to improve product stability and service life.
4. Storage & Notes
Store in a constant-temperature, dust-free, dry clean room environment, isolated from acidic and alkaline pollutants. Use dust-free and moisture-proof packaging to avoid secondary pollution. Strictly follow electronic chemical operation standards during handling to ensure no particle or metal contamination. Keep sealed for long-term storage to maintain ultra-high purity.
