New DYMAX electronics encapsulant is ultra-flexible

Soldering & Surface Mount Technology

ISSN: 0954-0911

Article publication date: 1 August 2004




(2004), "New DYMAX electronics encapsulant is ultra-flexible", Soldering & Surface Mount Technology, Vol. 16 No. 2.



Emerald Group Publishing Limited

Copyright © 2004, Emerald Group Publishing Limited

New DYMAX electronics encapsulant is ultra-flexible

New DYMAX electronics encapsulant is ultra-flexible

Keywords: Encapsulation, Encapsulant materials, Electronics

Curing in seconds upon exposure to UV/visible light, DYMAX 9008 encapsulant from INTERTRONICS exhibits excellent adhesion to polyimide, enduring bending and flexing even at extremes of thermal cycling to -20°C. The cured coating forms a transparent layer which protects components and leads from moisture, dust and other contaminants. DYMAX 9008 is formulated to dispense consistently through precision dispensing systems. Controlled placement optimises the process and minimises resin consumption. The flow characteristics of DYMAX 9008 are designed to assure coverage of leads of even large surface mount components, without running to areas where protection is not needed (Plate 1).

Plate 1 The DYMAX 9008 encapsulant

9008 flexible coating cures in 10-30s under standard longwave, moderate or high intensity lights (200-1200 mW/cm). The length of exposure depends upon the light used and thickness of the coating. However, thicknesses to 1.5 mm can be cured in UV conveyor belts at speeds of 60-20cm per minute or under spot lamps in a few seconds. Cure depths to 6.5 mm are possible.

Like other DYMAX coatings, 9008 is a tough, durable resin with excellent electrical properties. It has high ionic purity as well as the ability to withstand harsh environmental conditions. Coatings form protective surfaces and exhibit adhesion to a wide variety of surfaces including glass-filled epoxy, metal and ceramic surfaces as well as polyimide and other flex materials. Because 9008 is highly flexible – even at very low temperatures – the encapsulant provides superior protection where rugged conditions are the rule.

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