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15 August 2007


Kyma launches larger native SI GaN substrates

Kyma Technologies Inc of Raleigh, NC, USA has announced the availability of 25mm x 25mm native semi-insulating gallium nitride substrates, adding to its existing range of 10mm x 10mm and 18mm x 18mm SI GaN substrates.

Many customers are developing better and more reliable high-frequency high-power GaN transistors, says Dr Edward Preble, chief operating officer. The 25mm x 25mm product has excellent electrical resistivity properties, as corroborated by mapping measurements made by Tim Bogart, a collaboration partner at the Electro-Optics Center (EOC) of Penn State University, Preble claims. “The larger size and availability are the results of yield improvements in our native SI GaN boule growth and wafering processes,” he adds.

“Our customers can now benefit from the increased device yield expected when developing advanced transistors on a larger, albeit square, substrate,” says Dr Drew Hanser, chief technology officer.

Preble adds that Kyma has also produced limited quantities of 30mm x 30mm high-quality native SI GaN substrates, and plans to announce their availability in the coming months.

Kyma’s extended SI GaN product line has benefited from financial support from the US Air Force and US Missile Defense Agency (MDA) and from collaborative partnerships in SI GaN related materials and devices including EOC, the US Air Force Research Laboratory (AFRL), the Naval Research Laboratory (NRL), and the Naval Surface Weapons Center (NSWC). The larger square substrates are natural by-products of Kyma’s ongoing efforts, supported by the MDA and AFRL, to develop round three-inch and four-inch native SI GaN substrates, Hanser adds.

*The electrical characteristics of Kyma’s SI GaN will be the topic of the joint AFRL-Kyma paper ‘Electrical Properties and Deep Centers in Semi-Insulating Fe-Doped Native GaN Substrates Grown by Hydride Vapor Phase Epitaxy’, to be presented at the 7th International Conference of Nitride Semiconductors (ICNS-7) in Las Vegas, NV, USA on 24 September.

See related items:

Aonex and Kyma collaborate to cut blue laser and LED substrate costs

Kyma's native GaN substrates merit defense contract