Apple’s iPhone Duo Uses a Hinge-Buried Graphite Pipe to Manage Heat in Foldable Design
Apple’s first foldable smartphone, the iPhone Duo, utilizes a unique thermal solution to manage heat generated by its new A20 Pro chip. Because the device doubles in thickness when closed, standard cooling methods are insufficient. Apple engineers routed a flexible graphite pipe through the hinge to transfer heat between the two halves of the device, increasing the surface area available for dissipation. This innovation is part of a broader redesign of Apple’s thermal architecture, which includes a new vapor chamber and a 'metal over foam' interface material, ensuring the phone maintains high performance during sustained workloads like gaming and on-device AI processing.
