@User Many fabs have RRAMs available - I also know well the Skywater project as my friends are the PIs - Issues in general comes that foundries give access to RRAM arrays and not bitcells. I had talked to Skywater a while ago about having access to their RRAM process, but they had no plans to make it available on pure CMOS nor getting public access (under NDA) yet to the fancy CNT-CMOS-RRAM.