Patent ID: 6706563
Filing Date: 2004-03-16
Classification: H01L

Abstract:
A method for packaging a semiconductor device, forming a Plastic Ball Grid Array (PBGA) package, comprising the steps of:(A) providing a semiconductor device mounting support having a first and a second surface, said semiconductor device mounting support having been provided with interconnect traces and at least one metal pad therein or thereover; (B) mounting at least one semiconductor device over the second surface of said semiconductor device mounting support; (C) connecting said at least one semiconductor device in a face upward position by facing an active surface of said at least one semiconductor device away from said semiconductor device mounting support, using interconnect wires between said interconnect traces provided in said semiconductor device mounting support and contact points provided in an active surface of said at least one semiconductor device; (D) positioning a heat spreader over the surface of said substrate, said heat spreader comprising: (a) a horizontal section being parallel with a semiconductor device mounting support over which said heat spreader is being mounted, said horizontal section having a perimeter; (b) heat spreader stand-off sections extending from said perimeter of said horizontal section, a lower section of said heat spreader stand-off sections forming a physical interface between said heat spreader and said semiconductor device mounting support over which said heat spreader is being mounted; (c) each of said heat spreader standoff sections comprising: (i) an upper section being connected to said horizontal section of said heat spreader under an angle (ii) a center section being connected with said upper section in a plane of said upper section, and (iii) said lower section being connected with said center section of said heat spreader standoff section; (d) each lower section of each of said heat spreader standoff sections comprising: (i) a first horizontal section being parallel with the surface of said semiconductor device mounting support, said first horizontal section being connected with said lower section of said heat spreader stand-off section; (ii) a U-shaped extrusion connected with said first horizontal section, with a lower side of said U-shaped extrusion facing said semiconductor device mounting support, with two remaining sides of said U-shaped extrusion interfacing with the surface of said semiconductor device mounting support under an angle, with at least one opening having been created through said lower side of said U-shaped extrusion; and (iii) a second horizontal section connected to said U-shaped extrusion; and (E) having mounted and interconnected at least one semiconductor device, further creating a mold compound overlying at least part of said heat spreader.