Low-Temperature Solder Paste for Solder Paste Printer

Specifically formulated to deliver outstanding performance on modern SMT lines, Low‑Temperature Solder Paste for Solder Paste Printer combines a high‑reliability flux system with fine spherical Sn42/Bi58 alloy powder. This advanced Solder paste printer‑optimized product is engineered to ensure exceptional printability, minimal viscosity variation, and consistent deposit volume even under high‑speed continuous printing. Its eutectic composition provides a sharp melting point at 138 °C, enabling energy‑efficient reflow while protecting temperature‑sensitive components – all while maintaining perfect compatibility with any standard Solder paste printer.

Solder Paste Composition

The formulation of Low‑Temperature Solder Paste for Solder Paste Printer consists of a eutectic Sn42/Bi58 alloy powder and a specially developed flux system. According to the technical datasheet:

• Alloy composition: Tin 41.5–42.5%, Bismuth 57.5–58.5% – eutectic point at 138 °C (both liquidus and solidus).
• Flux content: 10.0 ± 1.0 wt%, with halogen content < 0.05 wt%.
• Flux composition (wt%):

1. Hydrogenated Rosin: 45–48%
2. Straight‑chain C9–C12 
3. Aliphatic Alcohol: 20–22%
4. Cyclical C12–C16 Ester: 9–15%
5. Polymerized Fatty Oil: 4–6%
6. Dicarboxylic Acid Activator: 4–8%
7. Organic Amine C8–C10: 2–3%
8. Antioxidant/Corrosion Inhibitor: 2–3%

This low‑ionic flux system ensures that Low‑Temperature Solder Paste for Solder Paste Printer leaves minimal, non‑conductive residues after reflow, eliminating the need for post‑soldering cleaning while maintaining high surface insulation resistance (SIR) – a critical requirement for no‑clean processes where the Solder paste printer delivers precise deposition.

Optimized Printing Performance for Solder Paste Printer

Designed for both conventional and fine‑pitch applications, this Solder paste printer‑ready product features a particle size distribution of 25–45 μm (between Type 3 and Type 4), enabling excellent release from additive‑process stencils. The rheology is specially tuned to provide stable transfer efficiency and minimal slump, ensuring that every Solder paste printer operation achieves consistent solder deposit geometry.

Recommended printing parameters (Table 3 from TDS) – fully compatible with all major Solder paste printer models:

Key advantages for production on a Solder paste printer:

• Minimal viscosity change during continuous printing – even after thousands of strokes, the viscosity remains within ±10 %, ensuring long‑run stability on any Solder paste printer.
• Non‑hydrophilic nature allows stable operation at up to 80 % RH without absorbing moisture, preventing solder ball defects – a major benefit for Solder paste printer users in humid environments.
• Stencil life exceeds 8 hours – the paste does not dry out prematurely, reducing cleaning downtime and maximizing the uptime of your Solder paste printer.
• Excellent anti‑slump properties (< 0.2 mm) guarantee fine‑pitch printing without bridging, even at high squeegee speeds.

Flux Reliability & Electrical Performance

The flux system in Low‑Temperature Solder Paste for Solder Paste Printer employs a low‑ionic activator, passing stringent tests without causing corrosion or electromigration. This makes it an ideal no‑clean solution for assemblies where post‑reflow cleaning is impractical – a key consideration when integrating with a high‑speed Solder paste printer line.

These results confirm that Low‑Temperature Solder Paste for Solder Paste Printer delivers high reliability even in humid or high‑voltage environments, meeting the demanding requirements of modern consumer, automotive, and industrial electronics – while maintaining flawless performance on your Solder paste printer.

Low‑Temperature SnBi Alloy Advantages

As a lead‑free product (Pb < 0.001 %), Low‑Temperature Solder Paste for Solder Paste Printer fully complies with RoHS directives. Compared to conventional SAC (SnAgCu) alloys, the Sn42/Bi58 eutectic alloy offers:

• Melting point 138 °C – approximately 80 °C lower than SAC, protecting temperature‑sensitive components and substrates, while reducing energy consumption – an advantage that also reduces thermal stress on stencils and printer components.
• Mechanical properties:

1. Tensile strength: 55 MPa (25 °C) / 28 MPa (100 °C)
2. Elongation: 13 % (25 °C) / 18 % (100 °C)
3. Coefficient of thermal expansion: 13.4 × 10⁻⁶/°C

• Excellent creep resistance and thermal fatigue performance, verified in LED lighting, automotive sensors, and high‑frequency RF modules.

This low‑temperature profile also reduces warpage on thin PCBs, contributing to higher assembly yields – a key benefit that makes this Solder paste printer‑friendly product the preferred choice for heat‑sensitive designs.

Reflow Profile & Process Guidelines

To achieve optimal wetting and minimize voiding or solder balling, the following reflow profile is recommended for Low‑Temperature Solder Paste for Solder Paste Printer – fully compatible with the output of any Solder paste printer:

Handling guidelines for this Solder Paste on your Solder paste printer:

• Thawing: Allow 4–6 hours at 25 °C before opening the container to prevent moisture absorption – essential for maintaining consistent printing performance.
• Mixing: Use an automatic mixer for 2–5 minutes (sealed) or manual stirring for 3–6 minutes until uniform viscosity is restored (180 ± 20 Pa·s) – this ensures smooth transfer on the Solder paste printer.
• Printing‑to‑placement window: Complete component placement within 3–6 hours after printing to avoid surface drying; the paste’s extended open time supports the throughput of high‑speed Solder paste printer lines.
• Storage: Sealed at 0–10 °C, < 75 % RH; shelf life 180 days from date of manufacture.

Application Scenarios & Supply Capacity

Low‑Temperature Solder Paste for Solder Paste Printer has been successfully deployed in mass production across multiple sectors, delivering consistent results on a wide range of Solder paste printer platforms (including DEK, MPM, Fuji, Panasonic, etc.):

• Consumer Electronics: TWS earbuds, smartwatches, and portable devices – benefiting from low‑temperature assembly and fine‑pitch capability, all enabled by the precise printing of this Solder paste printer‑optimized paste.
• LED Lighting: COB modules and automotive interior lighting – where thermal management and reliability are critical, and where the Solder paste printer ensures uniform solder deposit.
• Automotive Electronics: Battery management systems (BMS), in‑vehicle sensors, and infotainment – requiring high SIR and vibration resistance, with the printing quality guaranteed by a well‑tuned Solder paste printer.

With over 30 active customers and a monthly production capacity exceeding 2 tons, this Solder paste printer‑ready product is readily available with 72‑hour delivery to support continuous SMT line operations. Our technical team provides on‑site process support to help you optimize your Solder paste printer settings for seamless integration of Low‑Temperature Solder Paste for Solder Paste Printer into your existing workflow.

Safety & Handling Compliance

• Contains no regulated hazardous substances (Japan Industrial Safety and Health Act).
• Free from organic solvents subject to poisoning prevention regulations.
• In case of skin contact, clean immediately with ethanol‑soaked cotton, then wash with soap and water.
• Adequate ventilation is recommended during reflow to minimize fume exposure.