Rework Underfill Adhesive for Chips – Reliable Protection and Easy Rework for Advanced Electronics

Rework Underfill Adhesive for Chips – Reliable Protection and Easy Rework for Advanced Electronics

With the continuous miniaturization and integration of semiconductor packaging, chip-level reliability has become a key concern in modern electronics. Underfill adhesives are critical for protecting chips from mechanical stress, thermal cycling, and vibration.
However, traditional underfill materials often make rework difficult or impossible once cured, leading to high repair costs and material waste.

The Rework Underfill Adhesive for Chips is designed to solve this problem. It offers strong reinforcement, excellent thermal cycling resistance, and controlled removability, allowing rework and component replacement without damaging the PCB or chip.
It is the ideal solution for BGA, CSP, and flip-chip assemblies in consumer electronics, automotive electronics, and communication devices.

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Product Features and Advantages

1. Reworkable Design – Easy Chip Removal
   Unlike conventional epoxy underfills, this advanced formula allows selective reflow or solvent-assisted removal, enabling defective chip replacement or reballing without damaging pads or substrates.

2. Excellent Thermal and Mechanical Protection
   The adhesive forms a strong, flexible interface between the chip and the PCB, effectively absorbing CTE (coefficient of thermal expansion) stress caused by temperature cycling.
   It enhances device reliability during drop, vibration, and reflow tests.

3. Optimized Flow and Curing Behavior
   With low viscosity and excellent wettability, the adhesive flows easily under small gaps between chip and substrate, ensuring complete coverage and void-free underfilling.
   It cures quickly at moderate temperatures, compatible with standard SMT reflow processes.

4. High Reliability and Chemical Resistance
   After curing, it provides strong adhesion, moisture resistance, and chemical stability, protecting chips from delamination, oxidation, and corrosion.

5. RoHS & Halogen-Free Compliance
   The product is environmentally friendly, free of halogens and heavy metals, and meets RoHS and REACH global environmental standards.

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Applications

The Rework Underfill Adhesive for Chips is specifically developed for:

• BGA (Ball Grid Array) packaging

• CSP (Chip Scale Package) assemblies

• Flip-Chip bonding and reinforcement

• RF modules and sensors

• Automotive electronics and telecommunication boards

• High-reliability consumer electronics such as smartphones, tablets, and wearables

It ensures stable chip attachment while maintaining rework flexibility for high-value or precision assemblies.

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Case Study

A leading smartphone manufacturer in South Korea encountered frequent micro-cracks under BGA chips during thermal cycling. Traditional underfill materials offered protection but prevented rework, resulting in high scrapping rates.

By switching to Rework Underfill Adhesive for Chips, the company achieved:

• 30% improvement in thermal cycling reliability;

• 100% reworkability, enabling safe chip removal without PCB damage;

• Reduced repair costs by 40%, and higher production yield.

The ability to replace defective chips without discarding entire boards made the production line significantly more cost-efficient and sustainable.

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Customer Pain Points and Solutions

Customer Pain Point	Solution Provided by Rework Underfill Adhesive
Conventional underfill cannot be removed once cured	Reworkable formula allows chip removal and replacement
Cracking or delamination during temperature cycles	High flexibility and CTE matching prevent stress failures
Incomplete flow under fine-pitch chips	Low viscosity ensures full capillary coverage
PCB damage during rework	Controlled debonding temperature protects substrates
Environmental compliance requirements	RoHS & Halogen-Free material meets international standards

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Technical Highlights

• Thermal Conductivity: 0.3 – 0.5 W/m·K

• Glass Transition Temperature (Tg): 90 – 130°C

• Curing Condition: 130°C / 5–10 minutes

• Rework Temperature: 200 – 230°C (Hot air or IR heating)

• Viscosity: 1000 – 3000 cps (adjustable)

• Storage Stability: 6 months at 25°C

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Conclusion

The Rework Underfill Adhesive for Chips combines high protection and easy reworkability, redefining modern semiconductor packaging materials.
It effectively solves the contradiction between chip reliability and rework convenience, making it the preferred choice for PCB assembly, repair, and high-value chip packaging.

For manufacturers of smart devices, automotive electronics, and communication modules, this adhesive ensures stable long-term performance while significantly reducing production and repair costs.

Enhance chip reliability, simplify rework, and boost efficiency — choose Rework Underfill Adhesive for Chips for next-generation electronics.