Patent ID: 8236612

Claim:
A method of forming electronic packages, the method comprising the steps of: forming a block of partially etched lead frames having selectively pre-plated top and bottom surfaces, the lead frames comprising webbed portions, chip attachment areas, and electrical lead portions in the form of pull-in leads, wherein the electrical lead portions are electrically separated from the chip attachment areas, and the lead frames are separated from each other by street portions; attaching a chip to a corresponding chip attachment area of a lead frame; forming one or more electrical connections between one or more terminals of the chip and one or more electrical lead portions of the corresponding lead frame; encapsulating the lead frames by applying an encapsulant material over the lead frames and the street portions separating the lead frames; back-patterning the bottom surface of the lead frames to remove the webbed portions and the street portions; and singulating the encapsulant material disposed over the street portions to form individual chip scale packages.