Just putting out next step learning challenges. I'm loving what he's doing, it's a great project, I hope he continues it by exploring different aspects of it.
Other challenges include smaller lithography and CMOS fabrication using a self-aligned gate process. But there are pitfalls ahead, including chemicals that can kill with in trace doses...
I fabricated my own ICs as a teen in my freshman year of college as part of our program, but that obviously wasn't at home. It was still awesome, just going through the entire process.
