Sun-Won Kang

A preliminary analysis of domain coupling in package power distribution network

The coupling of power domains in a typical package power distribution network (PDN) is investigated, mainly focusing on the effect of ground structures and substrate parameters. From the simulated impedance parameter data, the self and the coupling capacitances are calculated. The preliminary study shows that the effect of the bottom ground planes has the most dominant effect on the domain coupling, and the ground plane between adjacent power domains can be effectively used to reduce the domain coupling.

Some Recent Materials Applications of In Situ High Resolution Electron Microscopy

Since the realization that high resolution electron microscopy (HREM) imaging could be carried out under non-ambient conditions [1, 2], in situ HREM has broadened significantly and is now a well-accepted technique [3]. Our work has largely focused on heating materials to observe at atomic resolution the reactions which occur at elevated temperatures. The extension to environmental studies is likewise a significant achievement [4–6].