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Thermally activated with precise acid release onset at 135–145 °C, enabling controlled post-application curing.
Low volatility and negligible sublimation below 120 °C, ensuring excellent storage stability and handling safety.
Non-halogenated chemical structure, supporting halogen-free formulation requirements for electronics and automotive applications.
High thermal decomposition purity (>99.2%), minimizing residue formation in sensitive photoresist and dielectric layers.
Compatible with standard solvent-based and aqueous dispersion processing methods used in industrial coating lines.
Chemically amplified photoresists (CARs) for advanced semiconductor lithography (i-line, KrF, and ArF platforms).
Crosslinking catalyst in low-dielectric constant (low-k) spin-on dielectric (SOD) materials.
Acid-catalyzed condensation curing of melamine-formaldehyde and benzoguanamine resin systems in high-performance coatings.
Latent catalyst in thermosetting powder coatings for architectural and appliance finishes.
Acid source in heat-triggered microencapsulated self-healing polymer composites.
| Chemical Type | Sulfonium salt derivative (triphenylsulfonium nonaflate analog) |
| Product Form | Free-flowing crystalline powder |
| Appearance | White to off-white crystalline solid |
| Melting Point (DSC onset) | 138–142 °C |
| Primary Applications | Latent acid catalyst for photoresists, low-k dielectrics, and thermoset coatings |
| Key Features | Halogen-free, low volatility, high thermal latency, UV-stable anion |
| Benefits | Improved shelf life, reduced outgassing in vacuum processes, enhanced line-edge roughness (LER) control |
| Regulatory Compliance | REACH registered; RoHS 2015/863 compliant; no SVHC substances above threshold |
| Common Compatible Systems | Suitability |
| Novolac resin–phenolic crosslinker systems | Highly Recommended – Excellent compatibility and catalytic efficiency above 140 °C |
| Polyhydroxybenzoxazine matrices | Recommended – Requires co-additive optimization for full network development |
| Acrylic/methacrylic copolymer dispersions (e.g., Joncryl® series) | Suitable – Effective at 150–160 °C with extended dwell time |
| Spin-on carbon hardmask formulations | Highly Recommended – Minimal carbon contamination and high acid yield uniformity |
Q1: What is the CAS Registry Number for San-Apro AA-01?
A: The CAS Number for San-Apro AA-01 is 2277242-89-1.
Q2: What is the recommended loading range in photoresist formulations?
A: Typical dosage is 1.5–5.0 wt% relative to total solids, depending on resist matrix acidity sensitivity and desired deprotection kinetics.
Q3: How does San-Apro AA-01 differ from conventional triarylsulfonium salts (e.g., TPS-Nf)?
A: San-Apro AA-01 features a non-halogenated counteranion and optimized cation sterics, delivering higher thermal latency, lower acid diffusion length, and reduced metal ion content versus halogenated analogs.
Q4: Is San-Apro AA-01 compliant with food contact or medical device regulations?
A: It is not approved for direct food-contact or implantable medical device applications; it is intended for industrial electronic and coating use only.
Q5: Has migration or extractable acid been evaluated under ISO 10993 or USP <87>/<88> conditions?
A: Migration studies show <0.05 ppm acid extraction in aqueous simulants at 60 °C for 72 h; however, formal ISO 10993 biocompatibility testing has not been conducted.
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