Source : Free On-Line Dictionary of Computing

Flip Chip Pin Grid Array
     
         (FC-PGA) The package of certain {Intel}
        {Celeron} and {Pentium III} processors.  FC-PGA processors fit
        into {Socket 370} {motherboard} sockets.
     
        The Flip Chip {Pin Grid Array} is similar to {PPGA}, except
        that the {silicon} {core} is facing up and the {heat slug} is
        exposed.
     
        FC-PGA packaging is used by Pentium III processors, and
        Celeron 566 processors onward.  Earlier Celeron processors
        used {PPGA} packaging.
     
        Celeron processors are also available in {Slot 1} {SEPP}
        packaging and Pentium III processors in Slot 1 {SECC2}
        packaging.
     
        Adapters are available to allow a PPGA Celeron to plug into
        a Slot 1 connector.
     
        (2000-08-26)