Crafting Tunnel / Esaki Diodes: What Facilities Are Needed?

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Tunnel and Esaki diodes are not commonly produced in small quantities, and crafting them requires advanced facilities typically found in university-level research labs or specialized silicon fabrication plants. The discussion highlights the rarity of these diodes, with some vintage options available on auction sites, but emphasizes the need for a more substantial supply for specific applications. The conversation also points to resources like mpulsemw.com for further information on tunnel diodes. Overall, creating a bespoke batch of these diodes involves significant technical expertise and access to sophisticated equipment. The inquiry reflects a curiosity about the practicalities of diode production in a hypothetical scenario.
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This is not a home-work or course-work question. It is hypothetical, driven by curiosity.

Are any Tunnel / Esaki diodes being made ?
What grade of eg University facility / silicon forge would be required to craft a bespoke batch ?

Yes, I know a few Russian 'New Old Stock' diodes some-times show up on e-auction sites for eg $ 50 a pop, but what if your tale's protagonist needed a box full ??
 
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