Patent ID: 7993982

Claim:
A method of manufacturing a quad flat non-leaded package, the method comprising steps of: providing a sacrificial layer, two release films and two metal layers; stacking the sacrificial layer between the two release films and stacking the two release films and the sacrificial layer between the two metal layers, wherein each release film exposes a part of the sacrificial layer, and each metal layer covers one of the release films and the part of the sacrificial layer exposed by the release film; forming a first mask layer on each metal layer, wherein each first mask layer exposes a part of the corresponding metal layer; forming a first patterned conductive layer on the part of the metal layer exposed by each first mask layer; removing each first mask layer and each first patterned conductive layer exposes a part of the corresponding metal layer; forming a dielectric layer on the part of each corresponding metal layer exposed by each first patterned conductive layer; cutting the dielectric layers, the metal layers, the release films and the sacrificed layer; removing the sacrificial layer and the release films after cutting the dielectric layers, the metal layers, the release films and the sacrificial layer; removing the metal layers after removing the sacrificial layer and the release films; disposing at least one chip on each first patterned conductive layer; and forming a plurality of bonding wires to electrically connect each chip to the corresponding first patterned conductive layer.