| General > General Technical Chat |
| 22-year old builds chips on his garage |
| << < (3/4) > >> |
| PlainName:
--- Quote --- it makes him appear a little big headed --- End quote --- Seems to me he has every right to be if he wanted - hands up anyone here who has even vaguely approached the kind of stuff he's achieved. Bonus points for being younger than 30. But in fact he doesn't seem to be big-headed at all. OTOH, grumbling jealousy... wonder where I've seen that before... |
| mnementh:
I'd suggest that where this idea could shine is in production of legacy semiconductors which are no longer possible because mass-production tech has changed so much in process that the result really isn't the same device. 2N3055H transistors made using the hometaxial process spring to mind; the later epitaxial designs simply are a different transistor. If Dalibor can recreate/rediscover the technology that made large-format nixies possible, I see no reason this guy couldn't figure out how to make a 2N3055 that behaves the same as the original in those old much-sought-after amplifier designs. :-// Before you say it... no, that is not my rabbit-hole; it's just a "thing" that I'm aware of. mnem Just an observation; As always, take anything I say with a grain of salt big enough to pickle a dwagon. ;) |
| schmitt trigger:
--- Quote from: mnementh on January 23, 2022, 03:50:12 pm ---I'd suggest that where this idea could shine is in production of legacy semiconductors which are no longer possible because mass-production tech has changed so much in process that the result really isn't the same device. Just an observation; As always, take anything I say with a grain of salt big enough to pickle a dwagon. ;) --- End quote --- I am sure there would be a market for the LM3909 LED flasher, among other retro ICs... ;D |
| nctnico:
--- Quote from: schmitt trigger on January 23, 2022, 04:39:12 pm --- --- Quote from: mnementh on January 23, 2022, 03:50:12 pm ---I'd suggest that where this idea could shine is in production of legacy semiconductors which are no longer possible because mass-production tech has changed so much in process that the result really isn't the same device. Just an observation; As always, take anything I say with a grain of salt big enough to pickle a dwagon. ;) --- End quote --- I am sure there would be a market for the LM3909 LED flasher, among other retro ICs... ;D --- End quote --- That would be cool but IIRC that would require having more layers. Besides that the LM3909 is likely made in a bipolar technology. Something else missing is input protection; a usefull chip has some resilience against ESD. IOW: it will take a few more steps to achieve making actual chips like you can buy from a big manufacturer. Nevertheless I'm very impressed by what Sam Zeloof is achieving in his home lab. It is great to see young people interested in technology that everyone takes for granted. |
| magic:
Bipolar requires running your own epitaxial growth (after buried diffusions), precise diffusion depth control and multiple diffusion on one another. I know nothing about those processes in practice, but it surely sounds like more work if doable at all. CMOS has some nested diffusions too and one of them needs to go under gates, so you can't start with off-the-shelf wafer with pre-applied oxide and poly. NMOS is easy mode :) |
| Navigation |
| Message Index |
| Next page |
| Previous page |