Patent ID: 7869223

Claim:
A circuit board device for an information apparatus comprising: a base board having mounted thereupon a plurality of low-frequency electronic components; and a multilayer module board mounted at one surface of the base board and having mounted thereupon a plurality of high-frequency electronic components including at least a CPU and a memory, wherein: the multilayer module board is one of (i) a low-end module board, (ii) a high-speed module board that operates at higher speed than the low-end module board or (iii) an advanced function module board having more functions than the low-end module board; and the base board is configured to accept interchangeably a connection with a multilayer board that is (i) the low-end module board, (ii) the high-speed module board and (iii) the advanced function module board, the plurality of high-frequency electronic components including a CPU and a memory mounted at, at least, a surface thereof, the plurality of high-frequency electronic components are connected with one another through a wiring patterns formed at an inner layer thereof, and an overall shape of the multilayer module board is rectangular and the multilayer module board comprises four connector terminals provided as separate members each soldered onto one of four peripheral edges thereof.