Ammono has made a breakthrough on high transparency n-type gallium nitride substrates for the production of LEDs and photovoltaic applications.

The company has developed a technology allowing the manufacture of GaN wafers with carrier concentrations between 2x1017 and 2x1020 cm-3. Currently, the standard n-type product has a carrier concentration of 1019cm-3.

To meet the market demand, Ammono is introducing new products based on an innovative n-type material which has a higher transparency and a lower carrier concentration of 3x1017cm-3.

The dislocation density in this material remains at a level of 5x104 cm-2 which Ammono says is currently the best commercially available. Initially Ammono will offer high transparency substrates in form factors of 10 mm x 10 mm square wafers and circular 1” wafers. In 2012 besides its standard 2” n-type AMMONO-GaN substrate, the company aims to introduce a 2” product based on this new high-transparency material.