Patent ID: 6437427
Filing Date: 2002-08-20
Classification: H01L

Abstract:
A lead frame for a semiconductor package comprising:a rectangular lead frame body having a central opening; a plurality of leads arranged at and along each of two or four facing sides of said lead frame body, said leads extending in flush with said lead frame body; a semiconductor chip mounting plate positioned on a plane not flush with a plane where said leads are positioned, said semiconductor chip mounting plate being supported by down-set tie bars and provided at a surface thereof, on which a semiconductor chip is to be mounted, with at least one groove having a rectangular ring shape; and a bridge bar arranged between said semiconductor chip mounting plate and said leads and supported by first tie bars, said bridge bar having a rectangular ring shape, wherein said bridge bar is supported by said first tie bars at four corners thereof, respectively, and said semiconductor chip mounting plate is supported by said down-set tie bars at four comers thereof, respectively.