is this really a working process for making transistors?

[davidv1992]

From what I remember from my course on electronics, and how field effect transistors work, the basic design she has seems OK, and all the materials look reasonable. She doesn't show the lithography, but the scales she seems to be working at seem large enough that that shouldn't be a problem with materials commercially available for e.g. pcb etching at home. And the basic processes used seem reasonable as well.

I am wondering what useful yield she manages for transistors as the example she shows has quite poor characteristics. Given the quality, it is probably not that easy to build useful circuits based on these, but it doesn't seem out of the question to me that these could actually be working. Of course, to be completely certain, one would have to try the process themselves under similar circumstances.