Patent ID: 7535090
Filing Date: 2009-05-19
Classification: H01L,H05K

Abstract:
1. An LSI package mountable on a printed wiring board, comprising: an interposer including a plurality of board-connecting joints, which establish a direct connection between the interposer and the printed wiring board, and a plurality of module-connecting terminals, wherein part of the module-connecting terminals are assigned as first monitoring terminals and another part of the module-connecting terminals are assigned as first electric joints; a signal processing LSI mounted on the interposer; and an interface module mounted on the interposer, including a plurality of interposer-connecting terminals, which are arranged to correspond to an arrangement of the module-connecting terminals, a transmission line to establish an external interconnection of a signal, which is transmitted from/to the signal processing LSI, and a controller circuit that includes an input to receive a status signal corresponding to a connection between the interposer-connecting terminals and the module-connecting terminals, and that blocks transmission and reception of signals to and from the external interconnection when the status signal indicates a poor connection between the interposer-connecting terminals and the module-connecting terminals, wherein part of the interposer-connecting terminals are assigned as second monitoring terminals and another part of the interposer-connecting terminals are assigned as second electric joints, wherein at least one pair of the first monitoring terminals or at least one pair of the second monitoring terminals are mutually short-circuited by a conductive path to serve as elements of a monitoring circuit, which monitors an electrical connection between the signal processing LSI and the interface module, such that a monitoring current to confirm the electrical connection can flow through the first and second monitoring terminals.