Patent ID: 8222081
Filing Date: 2012-07-17
Classification: H01L,H02M

Abstract:
1. A method of making a buck converter module comprising the steps of: forming a high side (HS) die having source bonding pads on a front side of said HS die in a first section of said HS die and having a drain and gate bonding pad on said first side of a second section of said HS die; forming a low side (LS) die having source, drain, and gate bonding pads on a front side of said LS die in a first section of said LS die, said front side of said LS die having a back side opposite said front side of said LS die with a drain connection at said back side of said LS die in said first section; forming a plurality of through silicon vias (TSVs) in a second section of said LS die, said TSVs extending from said front side to said back side of said LS die; and electrically connecting said source bonding pads of said HS die to said drain connection at said back side of said LS die, and connecting said drain and gate bonding pads of said HS die to ends of said TSVs on said back side of said LS die.