Abstract: A lead frame and a semiconductor package produced using the lead frame are disclosed. The lead frame has a plurality of multi-layered inner leads, each of the multi-layered inner leads having at least two different metal layers joined to each other. An outer lead is formed by an extension part of at least one of the different metal layers of each of the multi-layered inner leads. The semiconductor package includes a semiconductor chip, the lead frame and a package body hermetically packaging a predetermined volume including the semiconductor chip, the multi-layered inner leads of the lead frame and a plurality of metal wires. The lead frame is free from chip paddle, thus to improve operational reliability of the package. The semiconductor package with the lead frame is readily enlarged in its memory capacity and mounted on the surface of a PCB in various mounting types.

Abstract: A semiconductor package having lead bars provided with upper and lower surfaces outwardly exposed, thereby enabling a stacked mounting, a memory extension and a reduction in mounting area.The semiconductor package is manufactured by attaching a plurality of lead bars arranged in two rows in a facing manner to an upper surface of an adhesive tape, each of the lead bars having a first step and a second step positioned at a higher level than the first step, attaching a semiconductor chip to the first steps of the lead bars by an insulating adhesive, wire-bonding bond pads of the semiconductor chip with the second steps of the lead bars by metal wires, respectively, molding the lead bars, the semiconductor chip and the metal wires together by a molding compound under a condition that upper and lower surfaces of the lead bars are exposed outwardly of the molding compound, and removing the adhesive tape after the molding step.

Abstract: A plastic semiconductor package and a method for producing the same. The package comprises a plurality of chip signal transmitting leads protruded from a semiconductor chip and functioning as electrical passage, a plurality of polyimide tapes each attached to the corresponding lead and having the same width as that of the lead, a plurality of insulating double-sided tapes each attached to a side of an upper surface of the corresponding lead for attaching the lead to the semiconductor chip, a plurality of conductive bumps each disposed to the other side of the upper surface of the corresponding lead for electrically connecting the lead to the semiconductor chip, and mold resin enveloping a predetermined area including the semiconductor chip and the leads. Since the package does not have metal wire, it is possible to reduce deterioration of a package due to wire-bonding, since the method of the invention eliminates a trimming/forming step to simplify its process.