Patent ID: 7247515
Filing Date: 2007-07-24
Classification: H01L

Abstract:
1. A method of making semiconductor packages, comprising the steps of: providing a frame including a plurality of lead frames arranged in an array through longitudinally and transversely extending metal leads disposed in a grid formation and interconnecting said lead frames to one another, each lead frame having suspending leads which support a die pad and each suspending lead having a forked-shaped outer end defined by a pair of spaced-apart legs; mounting semiconductor devices on said respective die pads; wire bonding terminals of said respective lead frames to said corresponding semiconductor device; collectively molding with molding compound said semiconductor devices within a cavity; cutting along predetermined longitudinal and transverse cut lines disposed adjacent to the respective longitudinal and transverse leads to separate said respective lead frames from one another to form a plurality of individual semiconductor packages; and prior to said molding step, etching each lead frame to eliminate one of the longitudinal lead and the transverse lead within an area defined between directly connected lead frames and bordered by the forked-shaped ends thereof to prevent the formation of metal pieces at corners of the individual semiconductor packages which result after said cutting step.