Products, Materials + Tools | Aug 03, 2011

Kyma Introduces n+ Bulk GaN Substrate Product Line

Kyma Technologies, Inc., a leading supplier of ultra-high purity crystalline gallium nitride (GaN) and aluminum nitride (AlN) materials and related products and services, is pleased to announce the release of their n+ c-plane bulk GaN substrate product line.


The n+ GaN substrate product line will boast a bulk resistivity specification of  <0.02 Ω -cm, which is two orders of magnitude lower in resistivity than Kyma’s previously offered n-type GaN.  Furthermore, Kyma has successfully produced n+ bulk GaN wafers with measured carrier concentrations of up to 6 x 1018 cm-3 and corresponding bulk resistivities of < 0.005 Ω –cm.  Kyma’s n-type GaN product is still being offered and, for distinction, is being relabeled as n- GaN (“n minus” GaN).  While Kyma’s n- GaN remains an excellent starting material for a variety of materials and device studies, Kyma’s n+ GaN offers benefits for vertical devices as well as reduced contact resistance for all devices.  Key advantages for vertical power devices include ultra-low on-resistance as well as decreased parasitic resistance.  Key advantages for light emitting diodes (LEDs) include low vertical resistance and the mitigation of current crowding effects.

“We are pleased to respond to our customers’ requests for more conductive substrates,” said Dr. Jacob Leach, Kyma Characterization and Device Engineer. “The high electron concentrations in this new product line directly support higher performance and reliability for a number of device applications of great commercial interest.”

Ms. Tamara Stephenson, Kyma’s Technical Sales Engineer, added, “We are happy to offer these new substrates in form factors of 10 mm x 10mm squares and 18 mm x 18 mm squares. Additionally, the development of commercially available 2” diameter and larger n+ bulk GaN substrates is underway.”

About Kyma Technologies:
Kyma is a leading supplier of crystalline gallium nitride (GaN) and aluminum nitride (AlN) materials for a broad range of high performance nitride semiconductor device applications.
The market for nitride semiconductor devices is expected to surpass $90B over the long term, including over $60B in visible lighting applications and over $30B in power electronics applications.
For more information about Kyma Technologies, visit, e-mail, or call the company directly at 919.789.8880.