Patent ID: 9449653
Filing Date: 2016-09-20
CPC Classification: G11C,H01L

Claim Text:
1. A memory chip package comprising: a stack of memory chips electrically connected one another, the stack of the memory chips having a through-via extending therethrough, and the through-via constituting an optical path extending to and from each of the memory chips and the outside of the stack; a logic chip atop which the memory chips are stacked and configured to drive the memory chip package, and wherein each of the memory chips includes an optical-electrical converter which is operative to convert optical and electrical signals input thereto to corresponding electrical and optical signals, respectively, and a register programmable by an electrical signal input from an external device, the register is configured to store at least one value corresponding to one or more respective wavelengths of an optical signal, the memory chips are configured in such a way that an optical signal of the one or more respective wavelengths only can be transmitted from the optical path to each optical-electrical converter and such that among the memory chips the one or more respective wavelengths are different from each other, and the logic chip is configured to receive and output an optical signal only of a wavelength different from each of those that can be transmitted from the optical path to the optical-electrical converters of the memory chips.