LEDs ♦ news digest
new EVG720 platform, which is built on nearly 20 years of experience with more than 100 UV-based imprint lithography systems in the field,” states Gerald Kreindl, business development manager at EV Group.
“We recognise that a one-size-fits-all approach to NIL can’t address every customer’s unique manufacturing requirements, which is why EV Group has created a complete NIL solutions portfolio that encompasses all widely accepted imprint techniques - UV-NIL, hot embossing, micro contact printing, step-and-repeat, full-field, and roll-to-roll imprint. In addition, we are continuously working to improve the imprint lithography infrastructure by collaborating with companies and research organisations throughout the imprint lithography supply chain,” he continues.
EVG720 UV nanoimprint lithography system
Capable of printing nanostructures as small as 40 nm in diameter over a large area in volume production, the EVG720 system is ideally suited for use in manufacturing optics, photonics, LEDs, microfluidics and other bioMEMS devices, as well as advanced data storage devices. Several systems have already been installed, evaluated and accepted at customer sites.
The EVG720 UV-NIL system - EVG’s most advanced dedicated NIL system - utilises a next-generation UV-NIL process designed specifically to address the needs of high-volume manufacturing. It combines high throughput, ease of use and high resolution - enabling volume manufacturing of nanoscale structures at the lowest CoO.
EVG’s UV-NIL solutions, including the EVG720 system, are designed to work with a wide variety of resist materials. This open materials platform approach provides customers with a high degree of flexibility and process customisation.
In addition, the EVG720 has an integrated stamp replication capability, which minimises tool footprint and avoids increased capital equipment costs associated with stand-alone replication systems. EVG’s soft working stamps have optimised releasing properties that extend the life of the stamp and enable ideal imprint results on both flat and rough substrates.
Traditional stamps wear down quickly or require additional surface treatment after each imprint and result in increased defectivity on the substrate that leads to yield loss, as well as increased costs from continuous replacement.
“EV Group continues to extend its leadership in low- cost, high-throughput and reliable NIL solutions with our
Osram’s LED lives longer at high temperatures
The III-nitride based LED works with a new conversion technology allowing much thinner converter layers which better dissipate the heat
Excessive heat generation is one of the main reasons why LEDs fail. With the Oslon Square, Osram Opto Semiconductors is presenting an LED that withstands high ambient temperatures particularly well.
The Oslon Square LED (shown above) is ideal for interior lighting
To ensure that the colours of several LEDs in a luminaire remain uniform even at higher temperatures, they are measured and binned at 85°C, a temperature that comes very close to that encountered in lighting applications within buildings, in everything from spotlights to retrofit light sources.
Osram has optimised the heat dissipation of the Oslon Square to allow an increase in the junction temperature.
“With our new conversion technology, we can produce January / February 2014
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