AIM NCH88 High-Precision Electronic Assembly Solder Paste

AIM NCH88 SAC305 Solder Paste is a lead-free, no-clean solder paste specifically designed for high-precision electronic assembly processes, offering significant advantages in high-end manufacturing. The following analysis covers its composition characteristics, process compatibility, application performance, and market feedback:

‌I. Composition and Characteristics‌

1.‌Alloy System‌

● Utilizes SAC305 alloy (Sn96.5/Ag3.0/Cu0.5) with a melting point of 217°C, compliant with RoHS/REACH environmental standards and compatible with lead-free production requirements.

● The alloy formulation optimizes thermal fatigue strength and solder joint reliability, making it suitable for applications with stringent durability demands (e.g., automotive electronics, industrial control).

2.‌Flux Technology‌

● The activator system provides strong wettability, covering various surface coatings (e.g., OSP, ENIG, HASL) and reducing wetting defects (e.g., HiP).

● The no-clean formulation leaves residues with high insulation resistance, reducing PCB cleaning steps and improving production efficiency.

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3.‌Particle Control‌

● Narrow particle size distribution (T4-T5 grade) supports printing for ultra-micro components like 01005, ensuring high printing resolution, sharp edges, and reduced bridging risks.

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II. Process Compatibility‌

1.‌Printing Performance‌

● Excellent anti-slump properties support high-speed printing (up to 200mm/s) and extended printing life (continuous printing for over 8 hours in high-temperature, high-humidity environments).

● Strong viscosity stability reduces stencil clogging and solder beading, lowering equipment downtime and maintenance costs.

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2.‌Reflow Process Window‌

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● Wide reflow temperature range (peak 235-250°C), compatible with both air and nitrogen reflow environments, adaptable to various production line configurations.

● Anti-oxidation design reduces solder joint oxidation, improving first-pass yield (FPY).

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3.‌Void Control‌

Low void rates in BGA/BTC solder joints (BGA <5%, BTC <10%), enhancing thermal conductivity and mechanical strength, thereby extending product lifespan.

‌III. Application Performance‌

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1.‌Precision Electronic Assembly‌

● Ensures reliability in soldering 0.3mm pitch components in miniaturized products like smartphones and wearables, reducing cold solder and open circuit issues.

● Suitable for high-density interconnect (HDI) boards, preventing bridging and short circuits, thereby improving yield.

2.‌Automotive Electronics and Industrial Control‌

● Strong resistance to thermal cycling fatigue, adaptable to a wide temperature range of -40°C to +125°C, meeting automotive-grade reliability tests (e.g., AEC-Q100).

● Corrosion-resistant residues extend PCB service life and reduce post-sales maintenance costs.

3.‌Aerospace and Medical Equipment‌

High-purity materials and low ionic contamination characteristics meet stringent cleanliness requirements in high-reliability fields, preventing leakage currents and signal interference.

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IV. Usage Recommendations‌

1.‌Storage and Temperature Recovery‌

Recommended storage in refrigeration (0-10°C), allow to return to room temperature before use (≥4 hours), avoid direct heating to prevent flux degradation.

2.‌Mixing Process‌

Stir for 3-5 minutes after first opening to ensure uniform mixing of alloy and flux, improving printing consistency.

3.‌Printing Parameters‌

Optimize squeegee pressure, speed, and separation speed based on stencil thickness and component spacing; recommend determining parameters through DOE experiments.

4.‌Reflow Profile‌

● Preheat zone: 90-150°C (60-120 seconds) to activate flux;

● Reflow zone: peak temperature 245±5°C, duration 60-90 seconds;

● Cooling zone: rate ≥3°C/s to avoid excessive intermetallic compound (IMC) growth.

‌V. Summary‌

AIM NCH88 SAC305 Solder Paste, with its high reliability, strong process compatibility, and low void rates, is a preferred solution in high-end electronic manufacturing. The comprehensive benefits from improved yield and production efficiency make it indispensable in industries with stringent quality demands, such as automotive electronics, communication equipment, and medical instruments. For enterprises pursuing "zero-defect" production, NCH88 is an ideal choice for balancing cost and performance.