Interposer
![BGA with an interposer between the integrated circuit die to ball grid array](/Images/godic/202501/20/BGA_Package_Sideview.svg1652.png")
![Pentium II: example of an interposer, integrated circuit die to ball grid array chip carrier](/Images/godic/202501/20/Intel_Pentium_II_die-to-BGA-interposter1652.png")
An interposer is an electrical interface routing between one socket or connection to another. The purpose of an interposer is to spread a connection to a wider pitch or to reroute a connection to a different connection.
Interposer comes from the Latin word "interpōnere", meaning "to put up between".