Patent ID: 6247229
Filing Date: 2001-06-19
Classification: H01L,Y10T

Abstract:
A method of forming a plurality of integrated circuit device packages comprising:providing a plastic sheet having a first surface;attaching a metal sheet to the first surface of the plastic sheet;patterning the metal sheet so as to form an array of package sites, wherein each package site formed includes a die pad and a plurality of leads adjacent to the die pad, wherein the die pad and the leads so formed have a first surface, a second surface opposite the first surface and on the first surface of the plastic sheet, and peripheral side surfaces, and the side surfaces of the die pad and the leads include a reentrant portion and asperitiesplacing an integrated circuit device on the first surface of each die pad of the array;conductively connecting the integrated circuit device to the leads adjacent to the die pad on which the integrated circuit device is placed;applying an encapsulating material onto the array and the first surface of the plastic sheet so that each package site is encapsulated and the reentrant portion and the asperities of the side surfaces of the die pad and the leads are covered with the encapsulating material;removing the plastic sheet; andseparating the package sites to form the packages from the encapsulated array, wherein the second surface of the die pad and the leads of each package is exposed.