It's not the cleanroom that's the issue, it's mostly hazardous materials and some of the processes (gas deposition, sputtering) aren't garage friendly. That sa

It's not the cleanroom that's the issue, it's mostly hazardous materials and some of the processes (gas deposition, sputtering) aren't garage friendly. That said, there are people on youtube that are doing it, and it's doable to some degree in a garage environment, but the risks of dealing with hot HF acid are too much for most of us.