LEDs ♦ industry news
SEI To Produce First 2-inch Semi-Polar and Non-Polar GaN Substrates
Japanese materials specialist Sumitomo Electric Industries will produce in volume semipolar and nonpolar gallium nitride (GaN) substrates for green lasers.
Sumitomo Electric Industries has developed production technology which will enable large scale production of 2-inch diameter semipolar/nonpolar GaN (gallium nitride) substrates for green lasers.
Following its successful development of green semiconductor lasers in 2009, Sumitomo Electric has been developing manufacturing technology for semipolar and nonpolar GaN substrates. These materials will improve the performance of green semiconductor lasers and white LEDs (light emitting diodes). These efforts have resulted in the development of manufacturing technologies that inhibit piezoelectric effects on polarized substrates, improving device luminous efficiency.
of 2-inch substrates. The substrates produced by this newly developed technology exhibit a dislocation density on the order of 105, comparable to that of the c-plane substrates now in use.
Seoul Semi & Vertex To Pioneer LED Technology
The firms will jointly invest in LED technology development to create synergy effects from effective investments & asset management.
Seoul Semiconductor, a global innovator in Light- Emitting Diode (LED) technology, has signed an agreement with Singapore-based Vertex Venture Management to jointly seek and invest in companies with advanced capabilities in the areas of LED technology development.
Through this agreement, Seoul Semiconductor will leverage its world-leading expertise and deep experience in LED technologies to seek out high- potential companies and combine them with the capabilities of Vertex in sourcing and administering investment capital to achieve synergies for effective investment and returns.
In addition, with subsequent expansion of investment opportunities, both companies may establish a dedicated fund to nurture the research and development efforts of technology companies that will drive future innovation in the LED and its related industries.
In general, semipolar and nonpolar GaN substrates are manufactured by vertically or diagonally slicing GaN crystals along the c-plane. However, this method results in relatively small crystals (rectangular crystals with dimensions on the order of several millimeters). The size of these materials has been a major obstacle to increasing the production scale of higher efficiency LED devices.
To overcome this limitation, Sumitomo Electric has developed H-VPE (hydride vapor phase epitaxy) manufacturing technology for large scale production
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www.compoundsemiconductor.net November/December 2010
“There are various LED-related new technologies and application companies engaged in R&D that have synergies with such new technologies in the world. We want to support these efforts at such companies. We expect that many global firms will seek to work with us. All such firms are invited to sign-up on the Investment Application section of our website,” said Brian Wilcox, VP of North American sales for Seoul Semiconductor.
Vertex Venture Management is a venture capital firm that is a subsidiary of Vertex Venture Holdings, which is wholly owned by Temasek Holdings. Vertex is engaged in company investments and fund commitments throughout all of Asia and the U.S. Joo Hock CHUA, Chief Investment Officer of
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