Patent Publication Number: US-2022238486-A1

Title: Chip and Integrated Chip

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
     This application is a continuation of International Application No. PCT/CN2019/111430, filed on Oct. 16, 2019, the disclosure of which is hereby incorporated by reference in its entirety. 
    
    
     TECHNICAL FIELD 
     This application relates to the field of integrated circuit technologies, and in particular, to a chip and an integrated chip. 
     BACKGROUND 
     With development of semiconductor technologies, electronic devices tend to be light, thin, short, and small, and more performance and features are integrated in increasingly smaller space. Therefore, a chip packaging technology also becomes increasingly important in an electronic device industry chain. 
     Generally, a wafer is cut into a plurality of dies. As a chip becomes larger, a quantity of dies integrated in a single package continuously increases, and interconnection and communication need to be performed among the plurality of dies integrated in the single package. 
     In the conventional technology, the plurality of dies integrated in the single package are interconnected through routing in an area enclosed by a peripheral boundary of the plurality of dies. Consequently, routing in the area is complex, there is much data signal interference, and a delay of data signal transmission in the area is large. 
     In the field of high-performance computing, some pairs of dies (to be specific, one pair of dies includes two dies) in the plurality of dies integrated in the single package are sensitive to the delay of data signal transmission. In other words, the delay of data signal transmission is required to be low. It is clear that the foregoing solution in the conventional technology cannot implement a low data signal transmission delay. 
     SUMMARY 
     This application provides a chip and an integrated chip, to reduce a delay of data signal transmission between a pair of dies and improve data transmission efficiency. To achieve the foregoing objectives, embodiments of this application provide the following technical solutions. 
     According to a first aspect, this application provides a chip, including an interconnect layer, and a plurality of dies disposed on the interconnect layer. The plurality of dies include a first die and a second die, the first die and the second die are interconnected through routing in an edge area, the edge area is an area outside a bounding box on the interconnect layer, and the bounding box is a peripheral boundary of the plurality of dies on the interconnect layer. 
     Because there is no routing interference or little signal interference in the edge area, the first die and the second die are interconnected through routing in the edge area. In this way, a delay of data signal transmission between a pair of dies can be reduced, and data transmission efficiency can be improved. 
     In a possible implementation, the first die is not adjacent to the second die. In other words, a pair of non-adjacent dies is interconnected through routing in the edge area. 
     In a possible implementation, the plurality of dies further include a third die, the first die is adjacent to the third die, the first die and the third die are interconnected through routing in a bounding box area on the interconnect layer, and the bounding box area is an area enclosed by the bounding box on the interconnect layer. In other words, a pair of adjacent dies is interconnected through routing in the bounding box area. 
     In a possible implementation, the second die is adjacent to the third die, and the second die and the third die are interconnected through routing in the bounding box area on the interconnect layer. 
     In a possible implementation, the first die is adjacent to the second die. 
     In a possible implementation, the bounding box is a die top bounding box, and the die top bounding box indicates a boundary formed by peripheral dies in the plurality of dies. 
     In a possible implementation, the bounding box is a die angle bounding box, and the die angle bounding box indicates a boundary formed by vertex connecting lines of the plurality of dies. 
     In a possible implementation, the bounding box is a die gap bounding box, and the die gap bounding box indicates a boundary that covers gap areas among the plurality of dies and areas of the plurality of dies. 
     In a possible implementation, the bounding box is determined based on sizes, shapes, and arrangements of the plurality of dies. 
     In a possible implementation, a packaging manner of the chip is fan-out packaging, and the interconnect layer is a redistribution layer. 
     In a possible implementation, a packaging manner of the chip is CoWoS packaging, and the interconnect layer is an interposer. 
     In a possible implementation, a packaging manner of the chip is multi-chip module packaging, and the interconnect layer is a substrate. 
     In a possible implementation, each of the plurality of dies includes uBumps, and the plurality of dies are interconnected through routing by using the uBumps. 
     According to a second aspect, this application provides an integrated chip, including a first chip and a second chip. The first chip is the chip according to any one of the first aspect or the implementations of the first aspect, and the first chip and the second chip are packaged together. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1 a    provides a schematic diagram of communication among a plurality of dies in a single package by crossing an intermediate die; 
         FIG. 1 b    provides a cross-sectional view corresponding to  FIG. 1   a;    
         FIG. 2 a    is a schematic diagram of a die top bounding box of three dies according to an embodiment of this application; 
         FIG. 2 b    is a schematic diagram of a die angle bounding box of three dies according to an embodiment of this application; 
         FIG. 2 c    is a schematic diagram of a die gap bounding box of three dies according to an embodiment of this application; 
         FIG. 3 a    is a schematic diagram of a bounding box of three dies according to another embodiment of this application; 
         FIG. 3 b    is a schematic diagram of a bounding box of five dies according to an embodiment of this application; 
         FIG. 4 a    is a schematic diagram of routing on a die top bounding box provided in  FIG. 2 a    according to an embodiment of this application; 
         FIG. 4 b    is a schematic diagram of routing on a die angle bounding box provided in  FIG. 2 b    according to an embodiment of this application; 
         FIG. 4 c    is a schematic diagram of routing on a die gap bounding box provided in  FIG. 2 c    according to an embodiment of this application; 
         FIG. 5  is a schematic cross-sectional view corresponding to  FIG. 4   a,    FIG. 4   b,  and  FIG. 4 c    according to an embodiment of this application; 
         FIG. 6 a    is a schematic diagram of routing of nine dies based on a die top bounding box according to an embodiment of this application; 
         FIG. 6 b    is a schematic diagram of routing of nine dies based on a die angle bounding box according to an embodiment of this application; 
         FIG. 6 c    is a schematic diagram of routing of nine dies based on a die gap bounding box according to an embodiment of this application; 
         FIG. 7 a    is a schematic cross-sectional view corresponding to  FIG. 6 a   ,  FIG. 6 b   , and  FIG. 6 c    according to an embodiment of this application; 
         FIG. 7 b    is a schematic cross-sectional view corresponding to  FIG. 6 a   ,  FIG. 6 b   , and  FIG. 6 c    according to another embodiment of this application; 
         FIG. 8 a    is a schematic diagram of routing of three dies based on fan-out packaging and a die top bounding box according to an embodiment of this application; 
         FIG. 8 b    is a cross-sectional view corresponding to  FIG. 8 a    according to an embodiment of this application; 
         FIG. 9 a    is a schematic diagram of routing of three dies based on CoWoS packaging and a die top bounding box according to an embodiment of this application; 
         FIG. 9 b    is a cross-sectional view corresponding to  FIG. 9 a    according to an embodiment of this application; 
         FIG. 10 a    is a schematic diagram of routing of three dies based on MCM packaging and a die top bounding box according to an embodiment of this application; and 
         FIG. 10 b    is a cross-sectional view corresponding to  FIG. 10 a    according to an embodiment of this application. 
     
    
    
     DETAILED DESCRIPTION OF ILLUSTRATIVE EMBODIMENTS 
     A plurality of dies in a single package are interconnected through routing in an area (a bounding box area) enclosed by a peripheral boundary of the plurality of dies. Generally, adjacent dies in the plurality of dies are interconnected through direct routing in the area, and non-adjacent dies are interconnected by crossing an intermediate die (the intermediate die is adjacent to both of the two non-adjacent dies). In other words, a die on one side transmits a data signal to the intermediate die, and then the intermediate die transmits the data signal to a die on the other side. Therefore, the intermediate die performs a transmission transit function, and this manner of interconnection by crossing the intermediate die may also be referred to as indirect routing for interconnection. 
       FIG. 1 a    provides a schematic diagram of interconnection and communication among a plurality of dies integrated in a single package by crossing an intermediate die. In addition, in  FIG. 1   a,  a fan-out packaging (FOP) in a 2.5D packaging technology is used as an example, and three dies, namely, a die  1 , a die  2 , and a die  3 , are integrated in a single package. A redistribution layer (RDL) and a substrate are below the three dies in sequence. The die  1  is not adjacent to the die  2 , and the die  3 , as an intermediate die of the die  1  and the die  2 , is adjacent to the die  1  and the die  2  respectively. Because the die  3  is adjacent to the die  1  and the die  2  respectively, the die  3  is interconnected to the die  1  and the die  2  through direct routing. Because the die  1  is not adjacent to die  2 , when a data signal is transmitted between the die  1  and the die  2 , the data signal is first transmitted to the die  3 , and then the die  3  transmits the data signal. For example, the die  1  transmits the data signal to the die  3 , and then the die  3  transmits the data signal to the die  2 . In this way, it is implemented that the die  1  transmits the data signal to the die  2 . In other words, the die  1  and the die  3  are interconnected by crossing the die  2 . It should be noted that  FIG. 1 a    is a top view, and  FIG. 1 b    is a cross-sectional view corresponding to  FIG. 1   a.  A hierarchical relationship of the substrate, the redistribution layer, and the dies can be more clearly seen from  FIG. 1   b.    
     It is clear that because the die  1  and the die  2  that are not adjacent are interconnected by crossing the die  3 , in other words, the die  1  and the die  2  are interconnected through indirect routing, a delay of transmission between the die  1  and the die  2  is affected, and the delay of transmission is high. Because the die  3  and the die  1  (or the die  2 ) that are adjacent are directly routed, generally, a delay of transmission between the die  3  and the die  1  (or the die  2 ) is low. However, in some specific scenarios, for example, in a scenario in which direct routing is interfered with by a large quantity of other signals, a problem of a high delay of transmission may also exist. 
     To resolve a problem of a delay of data signal transmission between a pair of dies in a plurality of dies integrated in a single package, this application provides a solution in which routing is performed in an edge area, to implement interconnection and communication, reduce the delay of data signal transmission between the pair of dies, and improve data transmission efficiency. 
     Before specific implementations of this application are described, related terms in this application are first described. 
     Die: The die is also referred to as a bare chip, a bare die, a wafer, or the like, and is a chip that is cut from a wafer and that is not packaged. Each die is a chip that has an independent function and that is not packaged. The die cannot be directly used in an actual circuit. The die is easily affected by an external environment temperature, an impurity, and physical force, and is easily damaged. Therefore, the die needs to be sealed in confined space, and a corresponding pin needs to be led out. In this way, the die can be used as a basic component. 
     Interconnect layer: The interconnect layer is a layer disposed below a plurality of dies integrated in a single package. In other words, the plurality of dies are disposed on the interconnect layer. The plurality of dies are generally routed on the interconnect layer to implement a communicative connection. In a specific implementation, the interconnect layer may be a redistribution layer (RDL), an interposer, a substrate, or an embedded multi-die interconnect bridge (EMIB). The interconnect layer may include a plurality of dielectric layers, conductive layers sandwiched among the dielectric layers, and the like. 
     Bounding box: Because a plurality of dies may be integrated in a single package, a peripheral boundary of the plurality of dies is referred to as a bounding box. Because the dies are generally disposed on the interconnect layer, the bounding box in this application is a peripheral boundary of the plurality of dies on the interconnect layer. 
     Bounding box area: The bounding box area is an area enclosed by a bounding box on an interconnect layer. 
     Edge area: The edge area is an area outside a bounding box area on an interconnect layer. 
     Adjacent dies: A plurality of dies are integrated in a single package, and the plurality of dies can form a bounding box area. If two dies in the plurality of dies are interconnected through routing in the bounding box area without crossing another die, in other words, the two dies are interconnected through direct routing, the two dies are adjacent dies. 
     Non-adjacent dies: Dies in a pair of dies that do not belong to the foregoing adjacent dies are non-adjacent dies. 
     The following points need to be noted. 
     1. In the following descriptions of embodiments of this application, a “first die” is described in some parts, and a “die  1 ” is described in some parts. Actually, the “first die” is the “die  1 ”. Similarly, a “second die” is a “die  2 ”, and a “third die” is a “die  3 ”. By analogy, an “N th  die” is a “die N”, where N is a positive integer. In the accompanying drawings of this application, for ease of description, the “die  1 ”, the “die  2 ” and the “die N” are uniformly used. “A plurality of” in embodiments of this application means two or more than two. 
     In the descriptions of embodiments of this application, terms such as “first” and “second” are only used for distinction and description, but cannot be understood as indication or implication of relative importance, and cannot be understood as an indication or implication of a sequence. 
     To make objectives, technical solutions, and advantages of this application more clearly, the following further describes this application in detail with reference to the accompanying drawings. 
     A plurality of dies may be integrated in a single package, sizes and shapes of the dies may be different, and the plurality of dies may be arranged in a plurality of manners. Therefore, a bounding box of the plurality of dies integrated in the single package are affected by the sizes, the shapes, and arrangements of the plurality of dies. 
     In some cases, the sizes, the shapes, and the arrangements of the plurality of dies integrated in the single package determine that the bounding box of the plurality of dies may be classified into three types. The three types are separately described below. 
     1. Die top bounding box 
     The die top bounding box is a boundary formed by peripheral dies in all the dies in the single package. Generally, the boundary is a rectangular boundary. 
     For example,  FIG. 2 a    provides a die top bounding box inside which three dies are located. The three dies are disposed on an interconnect layer. The three dies are a first die (a die  1 ), a second die (a die  2 ), and a third die (a die  3 ) respectively. The first die and the second die have a same size, and the third die has a different size from the first die and the second die. The three dies have a same shape and the shape may be considered as a rectangle. The three dies are arranged by row, the first die is not adjacent to the second die, the third die is located between the first die and the second die, and the third die is separately adjacent to the first die and the second die. 
     In  FIG. 2 a   , a dashed-line box is the bounding box. Because the dashed-line box is a rectangular boundary formed by a boundary of peripheral dies in the three dies, the bounding box is a die top bounding box. Further,  FIG. 2 a    further provides a bounding box area and an edge area. An area enclosed by the bounding box on the interconnect layer (including an area in which slashes are located and areas covered by the three dies) is the bounding box area, and an area outside the bounding box on the interconnect layer is the edge area. 
     2. Die angle bounding box 
     The die angle bounding box is a boundary formed by vertex connecting lines of all dies in a single package. 
     For example,  FIG. 2 b    provides a die angle bounding box inside which three dies are located. The three dies are located on an interconnect layer. The three dies are a first die (a die  1 ), a second die (a die  2 ), and a third die (a die  3 ) respectively. The first die and the second die have a same size, and the third die has a different size from the first die and the second die. The three dies have a same shape and the shape may be considered as a rectangle. The three dies are arranged by row, the first die is not adjacent to the second die, the third die is located between the first die and the second die, and the third die is separately adjacent to the first die and the second die. 
     In  FIG. 2 b   , a dashed-line box is the bounding box. Because the dashed-line box is a boundary formed by vertex connecting lines of the three dies, the bounding box is a die angle bounding box. Further,  FIG. 2 b    further provides a bounding box area and an edge area. An area enclosed by the bounding box on the interconnect layer (including an area in which slashes are located and areas covered by the three dies) is the bounding box area, and an area outside the bounding box on the interconnect layer is the edge area. 
     3. Die gap bounding box 
     The die gap bounding box is a boundary that covers gap areas among all dies in a single package and areas of all the dies, where a gap may be a gap formed between two dies, or may be a gap formed among more than two dies. 
     For example,  FIG. 2 c    provides a die gap bounding box inside which three dies are located. The three dies are located on an interconnect layer. The three dies are a first die (die  1 ), a second die (die  2 ), and a third die (die  3 ) respectively. The first die and the second die have a same size, and the third die has a different size from the first die and the second die. The three dies have a same shape and the shape may be considered as a rectangle. The three dies are arranged by row, the first die is not adjacent to the second die, the third die is located between the first die and the second die, and the third die is separately adjacent to the first die and the second die. 
     In  FIG. 2 c   , a dashed-line box is the bounding box, a part of the dashed-line box is a boundary that covers the areas of the three dies, and the other part of the dashed-line box is a boundary that covers the gap areas among the dies. For example, the other part is a boundary that covers upper and lower boundaries (excluding left and right boundaries) of a gap between the die  1  and the die  3  and upper and lower boundaries (excluding left and right boundaries) of a gap between the die  2  and the die  3 . Further,  FIG. 2C  further provides a bounding box area and an edge area. An area enclosed by the bounding box on the interconnect layer (including an area in which slashes are located and the areas covered by the three dies) is the bounding box area, and an area outside the bounding box on the interconnect layer is the edge area. 
     For the foregoing description, the following points need to be noted. 
     1. When the three types of bounding boxes are described above, three dies are used as an example for description. Actually, a plurality of dies may be integrated into a single package, for example, five, seven, or nine dies. A quantity of the plurality of chips integrated into the single package is not limited in this application. 
     2. When the three types of bounding boxes are described above, the three dies are used as an example for description. In addition, sizes, shapes, and arrangements of the three dies are further described. For example, the first die and the second die have the same size, the third die has the different size from the first die and the second die, the shapes of the three dies are the same, the three dies are arranged by row, and the like. Actually, the sizes, the shapes, and the arrangements of the plurality of dies integrated in the single package may be in various forms. For example, the sizes of the dies are different, the shapes of the dies are different, the dies are arranged by column, or the like. The sizes, the shapes, and the arrangements of the plurality of chips integrated in the single package are not limited in this application. 
     It can be learned from  FIG. 2 a   ,  FIG. 2 b   , and  FIG. 2 c    that, in some cases, the sizes, the shapes, and the arrangements of the plurality of dies integrated in the single package determine that a bounding box of the plurality of dies may be classified into the foregoing three types. However, in some other cases, the sizes, the shapes, and the arrangements of the plurality of dies integrated in the single package determine that there is only one type of bounding box of the plurality of dies, or that bounding boxes obtained through classification based on the foregoing three types essentially belong to a same type. The following further describes this case. 
     Case 1: The plurality of dies integrated in the single package have a same size and shape, and are arranged according to a particular rule, for example, arranged by row or column. In this case, there is only one type of bounding box of the plurality of dies. 
     For example,  FIG. 3 a    provides a bounding box inside which three dies are located. The three dies are located on an interconnect layer. The three dies are a first die (a die i), a second die (a die  2 ), and a third die (a die  3 ) respectively. The three dies have the same size and shape, the three dies are arranged by row, the first die is not adjacent to the second die, the third die is located between the first die and the second die, and the third die is separately adjacent to the first die and the second die. 
     In  FIG. 3 a   , a dashed-line box is the bounding box. If bounding boxes are formed based on the foregoing three types, it is found that the finally presented bounding boxes are the same, which is as shown in  FIG. 3   a.  Further,  FIG. 3 a    further provides a bounding box area and an edge area. An area enclosed by the bounding box on the interconnect layer (including an area in which slashes are located and areas covered by the three dies) is the bounding box area, and an area outside the bounding box on the interconnect layer is the edge area. 
     Case 2: The plurality of dies integrated in the single package have different sizes and shapes, and are arranged according to a particular rule, for example, arranged by row or column. In this case, there is also only one type of bounding box of the plurality of dies. 
     For example,  FIG. 3 b    provides a bounding box inside which five dies are located. The five dies are located on an interconnect layer. The five dies are a first die (a die  1 ), a second die (a die  2 ), a third die (a die  3 ), a fourth die (a die  4 ), and a fifth die (a die  5 ) respectively. Sizes and shapes of the first die, the second die, the fourth die, and the fifth die in the five dies are all the same, but the sizes and the shapes (a square) of the four dies are all different from a size and a shape (a rectangle) of the third die. The five dies are arranged in a manner shown in  FIG. 3   b,  the first die is not adjacent to the second die and the fifth die, the second die is not adjacent to the first die and the fourth die, the fourth die is not adjacent to the second die and the fifth die, the fifth die is not adjacent to the first die and the fourth die, and the third die is adjacent to all the other four dies. 
     In  FIG. 3 b   , a dashed-line box is the bounding box. If bounding boxes are formed based on the foregoing three types, it is found that the finally presented bounding boxes are the same, which is as shown in  FIG. 3   b.  Further,  FIG. 3 b    further provides a bounding box area and an edge area. An area enclosed by the bounding box on the interconnect layer (including an area in which slashes are located and areas covered by the three dies) is the bounding box area, and an area outside the bounding box on the interconnect layer is the edge area. 
     For the foregoing description, the following points need to be noted. 
     1. Only two cases are listed above. Actually, there may be a plurality of other cases that result in that there is only one type of bounding box of the plurality of dies in the single package. The plurality of other cases that are not listed are not limited in this application. 
     2. In the foregoing two listed cases, three dies and five dies are separately used as examples for description. Actually, a plurality of dies may be integrated into a single package, for example, seven or nine dies. A quantity of the plurality of chips integrated into the single package is not limited in this application. 
     The foregoing mainly describes the bounding box, the bounding box area, and the edge area of the plurality of dies integrated in the single package. The following describes routing of a pair of dies in the plurality of dies in an edge area to implement interconnection. 
     As shown in  FIG. 4 a   ,  FIG. 4 b   , and  FIG. 4 c   , an embodiment of this application provides a chip  100 . The chip  100  includes an interconnect layer no and a plurality of dies disposed on the interconnect layer. The plurality of dies include a first die (a die i) and a second die (a die  2 ). The first die and the second die are interconnected through routing in an edge area, where the edge area is an area outside a bounding box on the interconnect layer, and the bounding box is a peripheral boundary of the plurality of dies on the interconnect layer. 
     Because there is no signal routing in the edge area on the interconnect layer no, and the edge area is not interfered with by another data signal, the first die and the second die are interconnected through routing in the edge area. In this way, a delay of data signal transmission between the two dies can be reduced, and data transmission efficiency can be improved. 
     In a first implementation, the first die is adjacent to the second die. To be specific, the adjacent dies are interconnected through routing in the edge area (namely, a non-bounding box area) on the interconnect layer. As described above, the adjacent dies are generally connected through direct routing in the bounding box area. Generally, a delay of transmission caused by direct routing in the bounding box area is low. However, in some specific scenarios, for example, in a scenario in which routing is interfered with by a large quantity of signals, a problem of a high delay of transmission may also exist. In this implementation, the problem of the high delay of transmission caused in these specific scenarios can be resolved. It is considered that scenarios to which this implementation is applied are limited, this application does not provide further description, and no corresponding accompanying drawing is provided for description. 
     In a second implementation, as shown in  FIG. 4   a,    FIG. 4   b,  and  FIG. 4   c,  the first die is not adjacent to the second die. In other words, the non-adjacent dies are connected through routing in the edge area (namely, the non-bounding box area) on the interconnect layer. Compared with that non-adjacent dies are interconnected by crossing an intermediate die (in other words, interconnection is implemented through indirect routing), in this implementation, the first die and the second die that are not adjacent are interconnected through routing in the edge area, so that the delay of data signal transmission between the two dies can be reduced. 
     Further, in the foregoing second implementation, adjacent dies may further exist in the plurality of dies. Because there is no other die between the adjacent dies, the adjacent dies may be interconnected through direct routing in the bounding box area of the plurality of dies on the interconnect layer. As shown in  FIG. 4   a,    FIG. 4   b,  and  FIG. 4   c,  there is a third die (a die  3 ) between the first die and the second die that are not adjacent. The third die is adjacent to the first die, and the third die and the first die are interconnected through direct routing in the bounding box area. The third die is adjacent to the second die, and the third die and the second die are interconnected through direct routing in the bounding box area. 
     The following further describes, with reference to each type of bounding box, a routing manner of the plurality of dies in the chip provided in the second implementation in the foregoing embodiment. It should be noted that,  FIG. 2 a   ,  FIG. 2 b   , and  FIG. 2 c    provide the die top bounding box, the die angle bounding box, and the die gap bounding box inside which three dies are located respectively, and  FIG. 4   a,    FIG. 4   b,  and  FIG. 4 c    are schematic diagrams of routing in  FIG. 2 a   ,  FIG. 2 b   , and  FIG. 2 c    in sequence. 
     1. Routing on the die top bounding box 
       FIG. 4 a    is a schematic diagram of routing on the die top bounding box provided in  FIG. 2 a   . It can be learned from  FIG. 4 a    that, a difference between  FIG. 4 a    and  FIG. 2 a    is that a routing manner of the three dies in the single package is added. The die  1  is adjacent to the die  3 , and the die  1  and the die  3  are interconnected through direct routing in the bounding box area. The die  3  is adjacent to the die  2 , and the die  3  and the die  2  are interconnected through direct routing in the bounding box area. The die  1  is not adjacent to the die  2 , and the die  1  and the die  2  are interconnected through routing in the edge area. 
     2. Routing on the die angle bounding box 
       FIG. 4 b    is a schematic diagram of routing on the die angle bounding box provided in  FIG. 2 b   . It can be learned from  FIG. 4 b    that, a difference between  FIG. 4 b    and  FIG. 2 b    is that a routing manner of the three dies in the single package is added. The die  1  is adjacent to the die  3 , and the die  1  and the die  3  are interconnected through direct routing in the bounding box area. The die  3  is adjacent to the die  2 , and the die  3  and the die  2  are interconnected through direct routing in the bounding box area. The die  1  is not adjacent to the die  2 , and the die  1  and the die  2  are interconnected through routing in the edge area. 
     3. Routing on the die gap bounding box 
       FIG. 4 c    is a schematic diagram of routing on the die gap bounding box provided in  FIG. 2   c.  It can be learned from  FIG. 4 c    that, a difference between  FIG. 4 c    and  FIG. 2 c    is that a routing manner of the three dies in the single package is added. The die  1  is adjacent to the die  3 , and the die  1  and the die  3  are interconnected through direct routing in the bounding box area. The die  3  is adjacent to the die  2 , and the die  3  and the die  2  are interconnected through direct routing in the bounding box area. The die  1  is not adjacent to the die  2 , and the die  1  and the die  2  are interconnected through routing in the edge area. 
     It should be noted that  FIG. 4   a,    FIG. 4   b,  and  FIG. 4 c    are all top-view diagrams,  FIG. 5  provides cross-sectional views corresponding to  FIG. 4   a,    FIG. 4   b,  and  FIG. 4   c,  and the cross-sectional views corresponding to  FIG. 4   a,    FIG. 4   b,  and  FIG. 4 c    are the same. Because  FIG. 5  is the cross-sectional view, it cannot be seen from  FIG. 5  that routing of the die  1  and the die  3  and routing of the die  3  and the die  2  pass through the bounding box area, and routing of the die  1  and the die  2  passes through the edge area. In addition, each die in  FIG. 5  includes uBumps (uBump, uB), and the uBumps are configured to implement interconnection for the dies through routing. 
       FIG. 4 a   ,  FIG. 4 b   , and  FIG. 4 c    are described by using an example of routing of the three dies that are integrated in the single package. To describe that a plurality of dies may be integrated in a single package, the following further describes an example of routing of nine dies that are integrated in a single package. 
       FIG. 6 a   ,  FIG. 6 b   , and  FIG. 6 c    provide a routing manner of nine dies integrated in a single package.  FIG. 6 a    is a schematic diagram of routing of the nine dies based on a die top bounding box,  FIG. 6 b    is a schematic diagram of routing of the nine dies based on a die angle bounding box, and  FIG. 6 c    is a schematic diagram of routing of the nine dies based on a die gap bounding box. 
     It can be learned from  FIG. 6 a   ,  FIG. 6 b   , and  FIG. 6 c    that the nine dies are sequentially a die  1 , a die  2 , a die  3 , a die  4 , a die  5 , a die  6 , a die  7 , a die  8 , and a die  9 . The die  2  is adjacent to the die  1  and the die  3 . Therefore, the die  2  is interconnected to the die  1  and the die  3  through routing in a bounding box area. The die  4  is adjacent to the die  1  and the die  5 . Therefore, the die  4  is interconnected to the die  1  and the die  5  through routing in the bounding box area. The die  6  is adjacent to the die  1  and the die  7 . Therefore, the die  6  is interconnected to the die  1  and the die  7  through routing in the bounding box area. The die  8  is adjacent to the die  1  and the die  9 . Therefore, the die  8  is interconnected to the die  1  and the die  9  through routing in the bounding box area. It should be noted that, not any two adjacent dies are interconnected through routing. If there is no requirement for data communication between the two adjacent dies, the two dies do not need to be interconnected through routing. For example, there are a plurality of pairs of adjacent dies (the die  2  and the die  4 , the die  7  and the die  9 , and the like) in  FIG. 6 a   ,  FIG. 6 b   , and  FIG. 6 c   . Because there is no requirement for data communication between the adjacent dies, they are not interconnected through routing in the bounding box area. 
     Further, it can be learned from  FIG. 6 a   ,  FIG. 6 b   , and  FIG. 6 c    that the die  1  is not adjacent to any one of the die  3 , the die  5 , the die  7 , and the die  9 . Therefore, the die  1  is interconnected to the die  3 , the die  5 , the die  7 , and the die  9  through routing in an edge area. Similarly, not all two non-adjacent dies are interconnected through routing. If there is no requirement for data communication between the two non-adjacent dies, the two dies do not need to be interconnected through routing. For example, there are a plurality of pairs of non-adjacent dies (the die  3  and the die  7 , the die  5  and the die  9 , and the like) in  FIG. 6 a   ,  FIG. 6 b   , and  FIG. 6 c   . Because there is no requirement for data communication between the non-adjacent dies, they are not interconnected through routing in the edge area. 
     It should be noted that  FIG. 6 a   ,  FIG. 6 b   , and  FIG. 6 c    are all top-view diagrams, and  FIG. 7 a    and  FIG. 7 b    provide two cross-sectional views corresponding to  FIG. 6 a   ,  FIG. 6 b   , and  FIG. 6 c   . In  FIG. 7 a   , cutting is performed on one side of the die  5 , the die  4 , the die  1 , the die  8 , and the die  9 . In  FIG. 7   b,  cutting is performed on one side of the die  3 , the die  2 , the die  1 , the die  6 , and the die  7 .  FIG. 4   a,    FIG. 4   b,  and  FIG. 4 c    may all correspond to the two cross-sectional views. Similar to  FIG. 5 , in  FIG. 7 a    and  FIG. 7   b,  it cannot be seen whether routing for the dies passes through a bounding box area or an edge area. 
     In the 2.5D packaging technology, a packaging technology for the plurality of dies includes fan-out packaging (FOP), CoWoS (Chip-on-Wafer-on-Substrate) packaging, multi-chip module (MCM) packaging, and other packaging manners. For different packaging manners, the interconnect layer may have different forms. The following further describes the interconnect layer based on the different packaging manners. It should be noted that, the following describes each packaging manner based on routing on a die top bounding box. Actually, the other two types of bounding boxes may also be applied to the three packaging manners. For brevity of description, application of the other two types of bounding boxes to the three packaging manners is not further described in this application. 
     1. FOP packaging 
     In the FOP packaging, an interconnect layer is an RDL, a substrate is below the RDL, and a plurality of dies are on the RDL. 
       FIG. 8 a    provides a schematic diagram of interconnection of three dies in a single package through routing based on an FOP packaging manner and a die top bounding box. A difference between  FIG. 8 a    and  FIG. 4 a    is that the interconnect layer is a redistribution layer and a substrate is below the redistribution layer. 
     Correspondingly,  FIG. 8 b    provides a cross-sectional view corresponding to  FIG. 8 a   , and a hierarchical relationship among the substrate, the redistribution layer, and the dies can be clearly seen from  FIG. 8   b.    
     2. CoWoS packaging 
     In the CoWoS packaging, the interconnect layer is an interposer (interposer), a substrate is below the interposer, and a plurality of dies are on the interposer. 
       FIG. 9 a    is used as an example.  FIG. 9 a    provides a schematic diagram of interconnection of three dies in a single package through routing based on a CoWoS packaging manner and a die top bounding box. A difference between  FIG. 9 a    and  FIG. 4 a    is that the interconnect layer is an interposer and a substrate is below the interposer. 
     Correspondingly,  FIG. 9 b    provides a cross-sectional view corresponding to  FIG. 9   a,  and a hierarchical relationship among the substrate, the interposer, and the dies can be clearly seen from  FIG. 9   b.    
     3. MCM packaging 
     In the MCM packaging, the interconnect layer is a substrate, and there are a plurality of dies on the substrate. 
       FIG. 10 a    provides a schematic diagram of interconnection of three dies in a single package through routing based on an MCM packaging manner and a die top bounding box. A difference between  FIG. 10 a    and  FIG. 4 a    is that the interconnect layer is a substrate. 
     Correspondingly,  FIG. 10 b    provides a cross-sectional view corresponding to  FIG. 10   a,  and a hierarchical relationship among the substrate and the dies can be clearly seen from  FIG. 10   b.    
     Based on the foregoing embodiments, this application further provides an integrated chip. The integrated chip includes a first chip and a second chip. The first chip is the chip provided in the foregoing embodiments. The second chip may be the chip provided in the foregoing embodiments or a chip in another form. The first chip and the second chip are packaged together, the first chip may be packaged with the second chip through packaging on packaging (POP), fan-out wafer level packaging (FOWLP), or another packaging manner. This is not limited in this application. 
     It should be noted that the “chip” described in this application may be a chip product that has been packaged, or may be a chip product that has not been packaged (or referred to as “half-packaged”), or even has not been packaged. This is not limited in this application. 
     It should be noted that, although it is pointed out in the foregoing embodiments of this application that interconnection and communication are implemented between non-adjacent dies in a plurality of dies integrated in a single package through routing in an edge area, it is not required that interconnection and communication are implemented on all non-adjacent dies in the plurality of dies through routing in the edge area. Actually, a plurality of pairs of non-adjacent dies may exist in the plurality of dies integrated in the single package. Some of the non-adjacent dies are sensitive to a delay of data signal transmission among them. In other words, the non-adjacent dies require the delay of data signal transmission to be low. Therefore, interconnection and communication among the non-adjacent dies are implemented through routing in the edge area. Other adjacent dies are not sensitive to a delay of data transmission among the dies. Therefore, interconnection and communication may be implemented among these non-adjacent dies by crossing an intermediate die. Although a delay of transmission is large when the interconnection and communication are implemented by crossing the intermediate die, routing is performed in the bounding box area on the interconnect layer, the bounding box area is larger than the edge area, more and longer routing may be performed, and a larger communication bandwidth can be supported. On the contrary, because the bounding box area is generally small and narrow, routing is limited, and a communication bandwidth supported by routing in the bounding box area on the interconnect layer is limited. 
     Clearly, persons skilled in the art can make various modifications and variations to embodiments of this application without departing from the spirit and scope of embodiments of this application. In this way, this application is intended to cover these modifications and variations of embodiments of this application provided that they fall within the scope of protection defined by the following claims and their equivalent technologies.