Patent ID: 6020218
Filing Date: 2000-02-01
Classification: H01L

Abstract:
A method of manufacturing a ball grid array semiconductor package, comprising the steps of:forming a flexible circuit board strip having plural circuit pattern sections including a plurality of conductive traces having bond fingers and conductive ball lands on a flexible resin film;adhesively fixing a carrier frame onto the flexible circuit board strip by using an adhesive double-coated tape having a plurality of through holes at positions corresponding in a one to one relation with the plural circuit patterns on the flexible circuit board strip, thus exposing the circuit pattern sections;mounting semiconductor chips having a plurality of input/output pads in the center of the respective plural circuit patterns;electrically connecting the input/output pads of the semiconductor chips to the bond fingers of the respective circuit pattern sections;molding a resin encapsulant section for protecting the semiconductor chips and electrical connecting means against external environments;adhesively fusing a plurality of conductive balls provided as input/output terminals on the bottom surface of the flexible circuit board; andconducting a singulation by forming notches in the flexible resin film and the adhesive double-coated tape by use of a punch and by pressing the resin encapsulant section from the upside to remove the carrier frame and separate semiconductor packages in the piece.