Patent ID: 6333211
Filing Date: 2001-12-25
Classification: H01L

Abstract:
A process for manufacturing a premold type semiconductor package comprising the following steps of:inserting a lead frame between first and second molds at their open position, said lead frame comprising a stage and plurality of leads, said first and second molds having recesses which cooperatingly define a cavity therebetween when they are in their closed position, said first mold having a protruded portion which is in contact with a first surface of said lead frame in a closed position, and said second mold having a plurality of pins projected into said cavity, said pins being in contact with a second surface of the respective leads of said lead frame at positions offset from said protruded portion of the first mold while in the closed position;bringing said first and second molds to their closed position so that said lead frame is nipped therebetween;injecting resin into said cavity to form a mold resin integrally molded with said lead frame; andcutting respective leads of said lead frame extending outward from said mold resin;to thereby obtain a package comprising; a plurality of leads cut off from said lead frame, said mold resin integrally molded with said leads, said mold resin defining a chip mounting recess on first surfaces of said stage and leads wherein said chip mounting recess is formed by said protruded portion, and said mold resin is provided with a plurality of holes formed by said plurality of pins wherein the plurality of holes expose the respective leads at positions offset from said chip mounting recess, to define holes for external connecting terminals.