The micro-FCPGA (Flip Chip Plastic Grid Array) package consists of a die placed face-down on an organic substrate. An epoxy material surrounds the die, forming a smooth, relatively clear fillet. The package uses 478 pins, which are 2.03 mm long and .32 mm in diameter. While there are several micro-FCPGA socket designs available, all of them are designed to allow zero-insertion force removal and insertion of the processor. Different from micro-PGA, the micro-FCPGA does not have an interposer and it includes capacitors on the bottom side.