I've read a great deal about the development of Germanium field effect transistors and HJTs but are they actually been manufactured commercially? If so where can I buy them? I already know where to get Germanium diodes but I want MOSFETs if they're available.

  • 1
    \$\begingroup\$ You say germanium heterojunction, but that implies another material. Silicon germanium HBT IC processes have been available for a while, and there are commercially available parts with them. \$\endgroup\$ – W5VO Feb 17 '16 at 3:36
  • \$\begingroup\$ And why, exactly, do you want Ge MOSFETs? \$\endgroup\$ – WhatRoughBeast Feb 17 '16 at 4:21
  • \$\begingroup\$ @WhatRoughBeast: Because Ge has some very interesting properties that make it more useful than silicon for analog circuits. It has a higher electron mobility and lower barrier potential which is VERY useful for hardware random number generators. \$\endgroup\$ – Mr X Feb 18 '16 at 5:59

Short answer NO

These are still in the research/development phase and will not be available for purchase any time in the near future. If you see them available for purchase, they are quite likely a scam or unreliable. The only people I forsee selling these in the next 2 years also sell fake Persian rugs.

  • \$\begingroup\$ Does this also apply to Si-Ge heterojunction transistors too? \$\endgroup\$ – Mr X Feb 18 '16 at 5:58
  • \$\begingroup\$ Yes, it should. \$\endgroup\$ – Daniel Feb 18 '16 at 22:24

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