Dwave's CTO Geordie Rose is showing a picture of a 200mm wafer made of 5mm superconducting adiabatic quantum computing chips. There are about 1000 of the 5mm chips on the wafer.
The superconducting adiabatic quantum computing chips need dilution fridges for proper operation
Using a dilution refrigerator is the most powerful way to reach very low temperatures (a few thousands of degree above the absolute zero).
Adiabatic demagnetization can be used over the temperature range 4 kelvins down to microkelvins and the related room temperature application of Magnetic refrigeration.
Dry dilution refrigerator
Helium 3 refrigerator
20 page Hitchhikers guide to the dilution refrigerator