Oh, sorry, I've never seen those before! I wonder if they freeze dry them. I've dehydrated onions before but they don't get crisp, they are dry and chewy.
Penzeys Spices has some toasted dried onions and I just ate a few. They are crisp with a good onion flavor and then melt in your mouth. They are little tiny like confetti though, not like chips or rings. www.penzeys.com/cgi-bin/penzeys/p-penzeyso