In the modern electronics manufacturing industry, integrated circuits (ICs), serving as the “core brain” of devices, are critical to operational stability and design security. As electronic components evolve toward miniaturization and high integration, IC chips on printed circuit boards (PCBs) are exposed not only to complex mechanical stress,moisture corrosion and chemical erosion, but also to the risk of technology leakage.

Traditional encapsulation materials often struggle to balance curing speed, stress relief and cost control. For this reason, PUR 1603 A/B two-component solvent-free room-temperature curing adhesive has become an ideal choice for IC encapsulation on printed circuit boards, thanks to its excellent physical properties and process adaptability.

I. Core Technology: Resolving the Conflict Between High Efficiency & Low Stress

IC encapsulation on printed circuit boards (COB process or partial potting) imposes stringent requirements on adhesives. Featuring precisely engineered molecular structure, PUR 1603 A/B delivers essential protection while addressing key industry pain points:

· Fast Curing at Room Temperature: 30-Minute Cycle for Boosted Productivity

Curing time directly determines production efficiency in high-speed electronics manufacturing. PUR 1603 A/B uses a high-efficiency catalytic system and achieves full curing within 30 minutes at room temperature.Unlike conventional one-component heat-curing adhesives, it requires no expensive tunnel ovens or high-energy heat treatment, greatly reducing energy consumption and eliminating thermal damage to precision components.

· Low-Modulus Flexibility: Reliable Protection Against Thermal Shock

Differences in coefficient of thermal expansion (CTE) among PCB substrates, IC chips and encapsulants often cause internal stress, leading to solder joint cracking or chip failure.Cured PUR 1603 A/B offers excellent low modulus and high flexibility. Its elastic nature effectively absorbs stress during thermal cycling, providing long-term cushioning for delicate pins and precision components.

· Superior Confidentiality: Safeguarding Core Intellectual Property

Anti-reverse engineering is critical for high-performance circuits and proprietary designs. PUR 1603 A/B provides outstanding opacity, forming a dark, dense and moderately hard encapsulation layer.This reinforces physical stability and effectively protects chip models and circuit layouts from visual inspection or simple removal attempts.

· Ultra-High Cost Performance: Strong Competitive Cost Advantage

While maintaining high performance, PUR 1603 A/B is optimized for cost efficiency. Its solvent-free formula ensures 100% curing rate with zero material waste.Low overall operating cost and excellent compatibility with automated processes help manufacturers gain a strong edge in competitive markets.

II. Performance Parameters & Process Flexibility

Beyond specialized optimizations for IC encapsulation, PUR 1603 A/B delivers robust industrial-grade performance in core physical properties:

· Broad Adhesion Spectrum: Excellent adhesion to metals (aluminum, copper), plastics (ABS, PC, PA), rubber, polyester (PET), and various fabrics/felts.

· Versatile Process Compatibility: Features a wide processing window, supporting both high-precision automated dispensing (ideal for mass production) and manual mixing (suitable for R&D prototyping or small-batch repairs).

· Environmental Resistance: Outstanding aging and chemical resistance after curing, maintaining structural stability in humid, salt-spray, or mild acid/alkaline environments.

· Eco-Compliant Formulation: Low odor and low VOC emissions, fully compliant with RoHS and REACH regulations to support your green manufacturing goals.

III. Typical Application Scenarios

While PUR 1603 A/B is widely used in new energy battery bonding (aluminum-to-aluminum structures) and decorative panel lamination, its full advantages shine brightest in PCB IC encapsulation:

· Consumer Electronics Security & Reinforcement: Encapsulation for smart lock control boards and payment terminal encryption chips, offering both moisture protection and anti-tampering features.

· Automotive Electronic Control Units (ECUs): Its low-modulus property protects microprocessors from mechanical fatigue in high-vibration, wide-temperature automotive environments.

· Industrial Controller Protection: Full sealing and protection for core ICs in factory environments with high dust and chemical vapor exposure.

FAQ

Q: Does PUR 1603 require expensive heating equipment?

A: No. PUR 1603 A/B is specially formulated for room-temperature curing. It eliminates the need for ovens and reduces energy consumption, making it a cost-effective and eco-friendly solution.

Q: What other applications does this adhesive support besides PCBA?

A: Beyond precision IC encapsulation, PUR 1603’s excellent solvent-free properties and adhesion make it ideal for new energy battery component sealing, sensor protection, and flexible PET film lamination.

Q: Do Elaplus products meet international environmental standards?

A: Elaplus Functional Materials (Shanghai) Co., Ltd. is committed to sustainable development. PUR 1603 has passed strict RoHS and REACH compliance testing, ensuring your products can be sold globally without barriers.