The metal has done sterling service for 20 years but the time is approaching to find a replacement for copper as problems with parasitics continue to build up, work presented at last month’s IEDM shows. But it's not an obvious switch.
Work presented at IEDM 2020 shows taking advantage of the IC backside for power and ground for the additional area can deliver further benefits for IR drop and security.
Researchers at the Georgia Institute of Technology adapted conventional 2D layout tools to a two-layer monolithic 3D process that resulted in sizeable space and power savings.
US defense research agency DARPA sets targets for cooling overall systems and hot spots in stacked silicon, and backs joint research from Rockwell-Collins and Georgia Tech.
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