Guy makes a semiconductor lab in a shed and makes a RAM.
https://www.youtube.com/watch?v=HfSO-LCKmrAhttps://www.youtube.com/watch?v=h6GWikWlAQAOkay I thought this was one of those funny haha gimmick videos at first, but the more I watched the more impressive it became. Hell I haven't heard this many new terms in a year. This guy (or a group of them) built a lab for semiconductors. Let's pretend we want to replicate this process and thus we need to extract as much info as possible. Not only he needed the knowledge for electronics, but also dyi building, airflow engineering, prob chemistry, engineering the actual equipment…
First, build the environment.
The shed is separated into the gowning area and the cleanroom area. It is imperative that the cleanroom stays as clean as possible, as single speck of dust can ruin a chip.
1) The shed is insulated (there's a lot of information on cleanroom insulation online),
2) some framing is added so we can set a cleanroom grade HEPA filter with an air intake filter just under the roof. I cannot tell which filters he got from the video.
3) A dedicated electrical circuit is installed. No information in the video on the specifics.
4) Heating and cooling with a mini split. (Would be nice to specify which role heating and cooling plays)
5) The room is divided and now every space has to be sealed. (?) Instead of using expensive plastic, he uses flame-resistant drywall with a water-based epoxy to create a smooth particle-free surface. The attic space above is also sealed and controlled for airflow.
Now, the airflow part is very important (1st pic) the cleanroom is also kept at a positive pressure (how?) to keep the contamination from coming in. Massive HEPA filter scrubs the air and recycles it a few hundreds per hour. (because the room volume is small)
After all's said and done, a particle counter is brought to the cleanroom for testing. It shows 40 particles/40ft^3 in the middle, and sub-100 at the edge of the room. This makes it a class 100 cleanroom, which OP claims is on the level of Samsung, Intel, TSMC.
Post too long. Click here to view the full text.