We all know wide bandgap semiconductors, currently galium nitride and silicon carbide are the superstars becose many companies make them at relatively reasonable price. They aren't just mere lab curiosities but very real choices.

There are also many more wide bandgap semiconductor materials with even higher bandgaps such as diamond, silicon nitride, boron nitride, silicon dioxide and aluminum nitride a.k.a. AlN.

I read on wikipedia that military uses AlN transistors, which means they are actively produced somewhere. Do you know any manufacturer that makes AlN transistors? I want to know if there is currently any commercialy avaliable AlN transistor.

Last thing I want to add to prevent potential mistake, aluminum nitride have also high thermal conductivity, it’s a frequent substitude for toxic beryllium oxide used in transistor as heat spreader thermal material. I am looking for transistor that uses it as semiconductor, not as heatsink.

  • \$\begingroup\$ I apologise if this seems obvious or unhelpful. First, please include a link to the page that says the military is using AlN transistors, to help people who may read your question in future. Second, most companies who are selling technology make an effort to publish information about their products on the www. So I would expect to be able to use a web search engine to find Aluminum Nitride transistors if they are available commercially. What did you find? Are you hoping that someone on this forum will have 'inside information'? \$\endgroup\$ – gbulmer Mar 21 '18 at 19:31
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    \$\begingroup\$ wiki doesn't say the military use AIN transistors... it says "military applications," NOTHING about them using it as a semiconductor. Where have you seen transistors. AIN is used in alot of places \$\endgroup\$ – JonRB Mar 21 '18 at 20:13
  • \$\begingroup\$ JohnRB I assumed they use it as semiconductor material for some kind microwave transistor like in radar phase array. \$\endgroup\$ – wav scientist Mar 21 '18 at 20:31
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    \$\begingroup\$ gbulmer From Wikipedia,wide bandgap semiconductor page,under HEMT "Due to its cost, aluminum nitride is so far used mostly in military applications" This directly states military is using AlN HEMT transistors. \$\endgroup\$ – wav scientist Mar 21 '18 at 21:06
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    \$\begingroup\$ I just realized one thing,what we call Galium Nitride transistors arent only from Galium Nitride,they can also contain Aluminum Galium Nitride or even pure Aluminum Nitride in certain part/layer 3c1703fe8d.site.internapcdn.net/newman/gfx/news/hires/2009/… So when that person who wrote the Wiki page,he probably meant its used as layer in Galium Nitride HEMT transistors for military radar,not as the primary semiconductor with 6 eV bandgap. \$\endgroup\$ – wav scientist Mar 21 '18 at 22:02

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