Multi-die stack structure

摘要

A multi-die stack structure including N dies stacked vertically is described. N is an integer larger than or equal to 2. Each die includes N die-specific input pads, wherein a specific pad among the N pads is for the input of the die. The specific pad of each die above the bottom die is electrically connected with a different pad of the bottom die other than the specific pad of the bottom die, via at least one TSV and, when not being in the die neighboring to the bottom die, also via a different pad of each underlying die above the bottom die. The specific pad of the bottom die is electrically connected with at least one pad of the overlying die(s) that is not the specific pad of any overlying die and not any pad electrically connected with the specific pad of any overlying die.

主权项

1. A multi-die stack structure, comprising N dies stacked vertically, wherein
N is an integer larger than or equal to 2, each die comprises N die-specific input pads, wherein a specific pad among the N pads is for an input of the die, the specific pad of each die above a bottom die is electrically connected with a different pad of the bottom die other than the specific pad of the bottom die, via at least one through-substrate via and, when not being in the die neighboring to the bottom die, also via a different pad of each underlying die above the bottom die, and the specific pad of the bottom die is electrically connected with at least one pad of the overlying die(s) that is not the specific pad of any overlying die and not any pad electrically connected with the specific pad of any overlying die.