Patent ID: 8338232

Claim:
A flip-chip semiconductor chip packing method comprising: providing a lead frame, said lead frame includes a number of interconnect rods protruding from its top surface; flip chip mounting a semiconductor chip onto said lead frame, said semiconductor chip comprising a plurality of bonding pads on a first surface, wherein said bonding pads are connected with said interconnect rods; encapsulating said chip and said interconnect rods with a plastic packing material; and grinding said plastic packing materials and a second surface of said semiconductor chip opposite to said first surface to thin said semiconductor chip to a predetermined thickness after said semiconductor chip being encapsulated with said plastic packing materials; etching said exposed back surface of said semiconductor chip; and ion implanting and laser annealing said exposed back surface of said semiconductor chip; depositing a metal layer on an exposed back surface of said semiconductor chip after it being thinned; etching said lead frame from its bottom surface to form contact terminals that are connected to said interconnect rods, said contact terminals protrude from a bottom surface of said plastic packing material wherein said contact terminals protrude out from said bottom surface of said plastic packing material while said metal layer on said exposed back surface of said semiconductor chip exposed from said top surface of plastic packing materials; coating a metal protective layer on a surface of said contact terminals; pasting a film to a top surface of said plastic packing materials; and cutting through said plastic packing material to form a package encapsulating said semiconductor chip.