Patent ID: 6777791
Filing Date: 2004-08-17
Classification: H01L

Abstract:
A laterally diffused metal oxide semiconductor (LDMOS) power package comprising:a conductive mounting flange mounted on a heat sink and electrically connected to a dielectric substrate of a printed circuit (PC) board, said mounting flange having a top surface; a plurality of transistors mounted on the top surface of the mounting flange, each of said transistors having an input terminal, an output terminal, and a ground terminal, said ground terminal of each transistor being electrically coupled to the top surface of the mounting flange; a first ground signal return path electrically coupling the top surface of the mounting flange to the dielectric substrate; and a second ground signal return path electrically parallel to the first path and physically isolated therefrom, said second path electrically coupling the top surface of the mounting flange to the dielectric substrate; wherein, said second ground signal return path reduces losses associated with the first path caused by resistance due to skin effect.