Patent ID: 6069407
Filing Date: 2000-05-30
Classification: H01L,H05K,Y02P

Abstract:
A die-up BGA package for an integrated-circuit die, comprising:a rigid circuit board having a top surface, a bottom surface, and a plurality of electrical conductors formed therethrough between the top surface and the bottom surface of the rigid circuit board, wherein said electrical conductors each have circuit-board contact areas at the top surface of the rigid circuit board;a flexible insulated tape layer having an upper surface and a lower surface, wherein the lower surface of the flexible insulated tape layer is fixed to the top surface of the rigid circuit board, wherein the upper surface of the flexible insulated tape layer has a number of wire-bonding sites formed thereon, and wherein the lower surface of the flexible insulated tape layer has a number of tape-layer contact areas formed thereon;an integrated-circuit die having a pair of opposing surfaces, one of which surfaces is a die-mounting surface and the other surface of which has wire-bonding pads formed thereupon, wherein the die-mounting surface of the integrated-circuit side is mounted to the upper surface of the flexible insulated tape layer;means for electrically connecting the wire-bonding sites on the upper surface of the flexible insulated tape layer to respective tape-layer contact areas formed on the lower surface of the flexible insulated tape layer;a plurality of bonding-wire loops, each of which has one end bonded to one of the wire-bonding pads formed on the integrated-circuit die and the other end bonded to a respective one of the wire-bonding sites on the upper surface of the flexible insulated tape layer;means for connecting respective tape-layer contact areas on the lower surface of the flexible insulated tape layer to the circuit-board contact areas of the electrical conductors at the top surface of the rigid circuit board;a plurality of solder balls connected to the lower surface of the rigid circuit board and to the conductors formed through the rigid circuit board; andsealing means for covering and sealing the integrated-circuit die and the bonding wires.