Abstract: A semiconductor package includes a leadframe having a die pad and a plurality of pins disposed around the die pad, a metal interposer attached to a top surface of the die pad, and a semiconductor die attached to a top surface of the metal interposer. A plurality of bond wires with same function is bonded to the metal interposer. The die pad, the metal interposer and the semiconductor die are stacked in layers so as to form a pyramidal stack structure.

Abstract: A grid array type lead frame package includes a lead frame having a plurality of bonding fingers projecting inwardly from a periphery of the lead frame; a semiconductor device mounted on inner ends of the bonding fingers, wherein the semiconductor device comprises an active surface and a plurality of input/output (I/O) pads disposed on the active surface; a plurality of bonding wires extending between the I/O pads and the bonding fingers for transmitting signals from or to the semiconductor device; a molding compound at least partially encapsulating the semiconductor device, the bonding wires, and the bonding fingers; and a solder mask layer attached to a bottom surface of the molding compound and a bottom surface of each of the bonding fingers.

Abstract: A packaging structure for an optical sensor with drill holes formed directly below an underfill layer includes a substrate having a plurality of drill holes, a plurality of vias, a plurality of traces, a plurality of gold wires, an underfill layer, a die having a plurality of bonding pads, and a container for isolating the die from the ambient atmosphere. The plurality of vias are formed within the plurality of drill holes and the plurality of bonding fingers are formed on the substrate. The plurality of traces formed on the substrate couple the plurality of bonding fingers to the plurality of the vias. The plurality of gold wires couple the plurality of bonding pads to the plurality of bonding fingers. The underfill layer is formed between the die and the substrate for die attachment, wherein the plurality of the drill holes are formed below the underfill layer.

Abstract: A packaging structure for an optical sensor with drill holes formed directly below an underfill layer includes a substrate having a plurality of drill holes, a plurality of vias, a plurality of traces, a plurality of gold wires, an underfill layer, a die having a plurality of bonding pads, and a container for isolating the die from the ambient atmosphere. The plurality of vias are formed within the plurality of drill holes and the plurality of bonding fingers are formed on the substrate. The plurality of traces formed on the substrate couple the plurality of bonding fingers to the plurality of the vias. The plurality of gold wires couple the plurality of bonding pads to the plurality of bonding fingers. The underfill layer is formed between the die and the substrate for die attachment, wherein the plurality of the drill holes are formed below the underfill layer.