Patent ID: 7723836

Claim:
A chip stack structure having a shielding capability, comprising: a wiring substrate, the wiring substrate including a ground layer; a first chip attached on an upper surface of the wiring substrate and having first electrode pads; a plurality of first bonding wires which electrically connect the first electrode pads of the first chip to the wiring substrate; a shield plate positioned on the first chip, the shield plate comprising a conductive reinforcement plate and a non-conductive adhesion layer attaching the conductive reinforcement plate to the first chip, wherein a size of the non-conductive adhesion layer is larger than a size of the first chip and the non-conductive adhesion layer is formed entirely of the same material, wherein the plurality of first bonding wires do not contact a bottom surface of the conductive reinforcement plate; a grounding wire which connects the shield plate to the ground layer of the wiring substrate; a second chip attached to and supported by the shield plate; a second bonding wire which connects the second chip directly to a signal substrate pad of the wiring substrate; and a third bonding wire which connects the second chip to the shield plate, grounding the second chip via the grounding wire which connects the shield plate to the ground layer of the wiring substrate, wherein the non-conductive adhesion layer of the shield plate contacts a portion of at least one of the plurality of the first bonding wires and the first electrode pads, and the conductive reinforcement plate is detached from the at least one of the plurality of first bonding wires.