Patent ID: 6797540
Filing Date: 2004-09-28
Classification: H01L

Abstract:
A method of packaging semiconductor devices comprising:providing a lead frame panel patterned to define a plurality of device areas, each device area including a multiplicity of conductive contacts and a die attach pad, wherein the die attach pad is carried by support bars that extend from a plurality of the contacts; severing the support bars that carry the die attach pad while holding the lead frame panel and the die attach pads in place; adhering an adhesive tape to the bottom surface of the lead frame panel after the severing and while still holding the lead frame panel and the die attach pads in place such that the lead frame panel and the die attach pads are secured in their relative positions; mounting a plurality of dice onto the die attach pads, wherein each die is mounted onto an associated die attach pad; electrically connecting each die to the contacts of an associated device area; and forming a casing over the die and the contacts while leaving bottom surfaces of the contacts and the die attach pad exposed at a bottom surface of the package, wherein material that forms the casing is also exposed on the bottom surface of the package and is substantially co-planer with the bottom surfaces of the contacts wherein the casing isolates the contacts from each other.