here's the annotated version of the 2N2222 in the TO-18 package. the package is actually pretty complicated! lots of materials science here.pic.twitter.com/bipfyTJwGr
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here's the annotated version of the 2N2222 in the TO-18 package. the package is actually pretty complicated! lots of materials science here.pic.twitter.com/bipfyTJwGr
the transistor lights up like an LED! it happens if you reverse bias the base-emitter junction and trigger an avalanche breakdown (about 10V). h/t @whitequark for the technique.pic.twitter.com/3QfvHVzHSv
Could you angle it a bit, so you're looking down at the die?
oooh nice idea
Interesting. A lot of wasted space at the top there. I always thought they would be filled with something.
it's filled with...air
Got ant TO3 transistors to cut open?
yes but it'd take like 4 hours 
Who knew that it was hollow? 
that headspace held the pressurized magic smoke before it was sectioned.
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