Patent ID: 8222725
Filing Date: 2012-07-17
Classification: H01L

Abstract:
1. A microelectronic assembly comprising: an interconnection element having a plurality of element contacts; a first microelectronic device having a rear face adjacent the interconnection element, a front face remote therefrom, and device contacts exposed at the front face, the first microelectronic device having a plurality of edges; a first metal layer mounted to the interconnection element with the first microelectronic device therebetween, the first metal layer having a plurality of edges, the first metal layer extending beyond at least one of the edges of the first microelectronic device; a plurality of conductive elements extending from at least some of the device contacts of the first microelectronic device beyond at least one edge of the first microelectronic device to at least some of the element contacts, the conductive elements respectively extending beyond at least one of the edges of the first metal layer, the first metal layer having a surface disposed at a substantially uniform spacing from at least substantial portions of the conductive elements, such that a desired impedance is achieved for the conductive elements, the conductive elements spaced a smaller distance from the metal layer than the distance of the conductive elements from the front surface of the first microelectronic device; a second microelectronic device having a surface, a plurality of edges extending away from the surface, and device contacts exposed at the surface, the second microelectronic device overlying the first metal layer; and a second metal layer overlying the second microelectronic device, the second metal layer extending beyond at least one of the edges of the second microelectronic device, wherein the second metal layer is connectable to a source of reference potential.