SEMICONDUCTOR DEVICE
First Claim
1. A semiconductor device, comprising:
- a package board;
a first LSI connected to the package board and including a communication circuit performing communication through the package board;
a second LSI provided above the first LSI and performing arithmetic processing;
a third LSI provided above the second LSI and including a first storage device storing a result of arithmetic processing of the second LSI, the first storage device including a plurality of first memory cells provided at intersection points of a plurality of first bit lines and a plurality of first word lines; and
a first through silicon via provided so as to pass through the second LSI and electrically connecting the first, second, and third LSIs with one another.
1 Assignment
0 Petitions
Accused Products
Abstract
As the transfer between a processor LSI and a memory has been increasing year by year, there is a demand for increasing the traffic amount and reducing the power required for communication. With this being the condition, a method of stacking LSIs thereby reducing the communication distance is being contemplated. However, the inventors have found that the reduction of cost in the stacking process and the increase in the degree of freedom of selecting the memory LSI to be stacked are required for a simple stacking of processor LSIs and memory LSIs as so far practiced. An external communication LSI including a circuit for performing the communication with the outside of the stacked LSI at a high rate of more than 1 GHz; a processor LSI including a general purpose CPU etc.; and a memory LSI including a DRAM etc. are stacked in this order and those LSIs are connected with one another with a through silicon via to enable a high speed and high volume communication at a shortest path. Further, an interposer for facilitating the connection with the processor LSI is connected to the input terminal of the memory LSI to be stacked thereby increasing the degree of freedom in selecting memories.
46 Citations
19 Claims
-
1. A semiconductor device, comprising:
-
a package board; a first LSI connected to the package board and including a communication circuit performing communication through the package board; a second LSI provided above the first LSI and performing arithmetic processing; a third LSI provided above the second LSI and including a first storage device storing a result of arithmetic processing of the second LSI, the first storage device including a plurality of first memory cells provided at intersection points of a plurality of first bit lines and a plurality of first word lines; and a first through silicon via provided so as to pass through the second LSI and electrically connecting the first, second, and third LSIs with one another. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
-
-
12. A semiconductor device, comprising:
-
a package board; a first LSI connected to the package board and including a communication circuit performing communication via the package board; a second LSI provided above the first LSI and performing arithmetic processing using data from the communication circuit; a first through silicon via configured to pass through the second LSI and for electrically connecting the first and second LSIs; and an interposer layer provided above the second LSI, electrically connected to the first through silicon via, and provided on its top with a connection terminal for connecting another circuit. - View Dependent Claims (13, 14, 15, 16)
-
-
17. A method of manufacturing a semiconductor device in which a plurality of LSIs are stacked, the method comprising:
-
a first step of stacking a first LSI above a package board, the first LSI including a communication circuit for performing communication via the package board; after the first step, a second step of stacking a second LSI above the first LSI, the second LSI being adapted to perform arithmetic processing using data from the communication circuit; after the second step, a third step of providing an interposer layer above the second LSI, the interposer layer being adapted to connect between the first LSI or the second LSI and an LSI other than the first LSI and other than the second LSI with wiring; and after the third step, a fourth step of providing a first through silicon via configured to pass through the second LSI and adapted to electrically connect the first LSI and the second LSI with each other. - View Dependent Claims (18, 19)
-
Specification