Patent ID: 8643175

Claim:
A multi-channel package having at least four channels, and comprising: a package substrate having a first surface and a second surface, and groups of bonding pads on the first surface, each of the groups of bonding pads constituting a respective one of the channels such that the number of groups of the bonding pads is the same as the number of channels; 4n semiconductor chips mounted to the package substrate as stacked one on the other on the first surface thereof, wherein n is a positive integer equal to or greater than 1 such that there are at least four of the semiconductor chips or at least four groups of at least two of the semiconductor chips; and a plurality of groups of external connection terminals on the second surface of the package substrate, each of the groups of the external connection terminals constituting a respective one of the channels such that the number of groups of the external connection terminals is also the same as the number of channels, and wherein each of the groups of bonding pads is directly electrically connected to a respective one only of the semiconductor chips or to a respective one of the groups only of the semiconductor chips, such that the groups of the bonding pads are directly electrically connected in the package to one semiconductor chip or one group of semiconductor chips, respectively, each of the groups of bonding pads is electrically connected to a respective one only of the groups of external connection terminals, respectively, such that the groups of the bonding pads are electrically connected in the package to the groups of external connection terminals, respectively, each of the channels constitutes a discrete conductive path in the package associated with and along which signals are transmitted to/from a respective one or group of the semiconductor chips in the package, and the conductive path constituted by each of the channels is discrete and independent from those of the other channels in the package such that each of the chips can only transmit/receive signals to/from the external connection terminals via one of the channels amongst the at least four channels.