System in package integrating a plurality of semiconductor chips

A system in package integrating a plurality of semiconductor chips, comprising:

• a first chip at least including a central processing unit;
• a second chip having a user specification;
• and
• a module substrate including the first chip and the second chip adjacent to each other,
• wherein
• the first chip includes first module connection terminals on the first chip along a first side facing the second chip,
• the second chip includes second module connection terminals to be connected with the first chip, on the second chip along a second side facing the first chip, and includes a third side orthogonal to the second side,
• the first module connection terminals on the first chip and the second module connection terminals on the second chip are directly connected to each other by respective bonding wires,
• the module substrate includes first module terminals connected to respective connection terminals of the first chip other than the first module connection terminals of the first chip and second module terminals, where first ones of the second module terminals are connected to respective connection terminals of the second chip other than the second module connection terminals of the second chip and second ones of the second module terminals are unused,
• the module substrate further includes first-module-side pads electrically connected to respective ones of the first module terminals, second-module-side pads electrically connected to respective first ones of the second module terminals, and third-module-side pads electrically connected to respective second ones of the second module terminals,
• the second-module-side pads are directly connected to respective connection terminals of the second chip other than the second module connection terminals of the second chip by a bonding wire, and the third-module-side pads are not connected to the first chip or the second chip, and
• the first-module-side pads, the second-module-side pads and the third-module-side pads are on a surface of the module substrate having the first and second chips mounted thereon in a periphery of the module substrate, the first-module-side pads being on three peripheral sides of the first chip other than the first side and the second and third-module-side pads being on three peripheral sides of the second chip other than the second side so that the first, second and third-module-side pads surround the first and second chips, there being no unused pads of any type among the first-module-side pads on the three peripheral sides of the first chip.