NuSil Technology Set to Launch New Optical Encapsulation Gel at EuroLED 2009

Target Applications:
• For protection of sensitive photonics assemblies from mechanical shock, thermal shock, dust,
and ambient atmosphere
• As an embedding or potting compound for environmental protection of electronic assemblies and
components, such as LEDs
• For applications requiring low outgassing and minimal volatile components to avoid
contamination in sensitive devices
• Extended work time allows voids in complex assemblies to fill in and permits time for any
trapped air bubbles to float to the fluid surface and escape
• UV and heat resistant
• Handles stress during thermal cycling without cracking or delaminating
• For applications requiring an operating temperature range of -65°C to 240°C (-85°F to 464°F)

Providing excellent protection from mechanical and thermal shock, LS-3140 is ideal for use as an encapsulating, embedding or potting compound for the environmental protection of electronic assemblies and components. It is recommended for applications when a radiation-resistant, optically stable silicone is needed for encapsulating sensitive photonics, including LED assemblies and optical MEMs.

LS-3140 is a clear, tough gel that, due to its low modulus, handles stress during thermal cycling without cracking or delaminating. It is best suited for applications requiring an operating temperature range of -70°C to 200°C (-94°F to 392°F). LS-3140 is also low outgassing and recommended for applications requiring minimal volatile components to avoid contamination in sensitive devices.

“NuSil understands that the growth rate of traditional and non-traditional lighting applications, as well as MEMS, are really challenging the material supplier to meet the long-term reliability and performance needed,” said Brian Nash, vice president of Marketing and Sales. “LS-3140 is the latest addition to our line of optically clear silicone gels and is a great choice for potting and encapsulating optics, as it is designed to remain optically stable and is tough enough to handle the stresses from thermal cycling. We also believe optoelectronics and microelectronics applications will benefit from the low levels of volatile silicones in LS-3140.”

LS-3140 is easy to use in almost any application. Not only can it be reworked, but its extended work time allows voids in complex assemblies to fill in and permits time for any trapped air bubbles to float to the fluid surface and escape. To meet a multitude of processing requirements, it cures at room temperature or the cure rate can be accelerated with heat.

A datasheet can be downloaded from the NUSIL website.

For more information on NuSil’s silicones for photonics and electronics, visit www.nusil.com/photonics or call 805-684-8780.