Patent ID: 12211813

DETAILED DESCRIPTION

The typical embodiments embodying the features and advantages of the present disclosure are described in detail below. It should be understood that the present disclosure may have various changes in different embodiments, which do not depart from the scope of the present disclosure. The description and drawings herein are essentially used for the purpose of explanation, rather than limiting the present disclosure.

Different exemplary embodiments of the present disclosure are described below with reference to the accompanying drawings. The accompanying drawings form a part of the present disclosure, which show by way of example different exemplary structures, systems and steps that can implement various aspects of the present disclosure. It should be understood that other specific solutions of components, structures, exemplary devices, systems and steps may be used, and structural and functional modifications may be made without departing from the scope of the present disclosure. Moreover, although the terms such as “above”, “between” and “within” may be used in this specification to describe different exemplary features and elements of the present disclosure, these terms are used herein only for convenience of description, for example, according to the directions of the examples in the drawings. Nothing in this specification should be understood as requiring a specific three-dimensional direction of the structure to fall within the scope of the present disclosure.

An embodiment of the present disclosure provides a semiconductor structure. Referring toFIG.1andFIG.2, the semiconductor structure includes: a first chip10, where the first chip10includes a first substrate11, a first conductive connection wire12, and a first conductive contact pad13, the first conductive contact pad13is connected to the first conductive connection wire12, the first conductive contact pad13includes a first conductor group131and a first connection group132, and a melting point of the first conductor group131is higher than that of the first connection group132; and a second chip20, where the second chip20includes a second substrate21, a second conductive connection wire22, and a second conductive contact pad23, the second conductive contact pad23is connected to the second conductive connection wire22, the second conductive contact pad23includes a second conductor group231and a second connection group232, a melting point of the second conductor group231is higher than that of the second connection group232, the first conductor group131is directly opposite to the second conductor group231, and the first connection group132is directly opposite to the second connection group232, such that a bonding structure is formed between the first conductive contact pad13and the second conductive contact pad23. An end of the first conductive contact pad13facing toward the second conductive contact pad23is a first contact surface14, an end of the second conductive contact pad23facing toward the first contact surface14is a second contact surface24, an area occupied by the first conductor group131on the first contact surface14is larger than an area occupied by the first connection group132on the first contact surface14, and an area occupied by the second conductor group231on the second contact surface24is larger than an area occupied by the second connection group232on the second contact surface24.

The semiconductor structure according to an embodiment of the present disclosure includes the first chip10and the second chip20. The first conductive connection wire12of the first chip10is connected to the first conductive contact pad13; the second conductive connection wire22of the second chip20is connected to the second conductive contact pad23; the first conductive contact pad13includes the first conductor group131and the first connection group132, and the second conductive contact pad23includes the second conductor group231and the second connection group232. The first conductor group131is directly opposite to the second conductor group231, the first connection group132is directly opposite to the second connection group232, the melting point of the first conductor group131is higher than that of the first connection group132, and the melting point of the second conductor group231is higher than that of the second connection group232. Therefore, the first connection group132and the second connection group232can be melted and connected at a first temperature, thus implementing a pre-connection between the first conductive contact pad13and the second conductive contact pad23. Then, the pre-connected first chip10and second chip20are transferred to an annealing condition at a second temperature for bonding, to achieve reliable bonding between the first conductive contact pad13and the second conductive contact pad23. Because the first chip10and the second chip20have been pre-connected before being transferred, relative movement between the first chip10and the second chip20is avoided, which ensures the subsequent alignment of the first chip10and the second chip20to be reliable, thereby improving the performance of the semiconductor structure.

It should be noted that, at the first temperature, the first connection group132and the second connection group232are melted, while the first conductor group131and the second conductor group231are not melted. In this case, the first connection group132and the second connection group232can be connected, and various materials of the first conductive contact pad13and the second conductive contact pad23can be interpenetrated and fused. As shown inFIG.2, a compound is thus formed, thereby implementing the pre-connection between the first conductive contact pad13and the second conductive contact pad23. Because the first conductive contact pad13and the second conductive contact pad23are pre-connected, relative slippage of the first chip10and the second chip20is avoided in the subsequent process of transferring the first chip10and the second chip20, ensuring that the first chip10and the second chip20are bonded under the annealing condition at the second temperature while the first chip10and the second chip20are connected with reliable alignment. Therefore, the first conductive contact pad13and the second conductive contact pad23are bonded reliably, and a reliable bonding structure is formed between the first conductive contact pad13and the second conductive contact pad23. In the related art, the first chip10and the second chip20are directly placed in a high-temperature environment for bonding, and the alignment is affected by the slippage during the transfer process, thus affecting the performance of the semiconductor structure. The semiconductor structure in this embodiment can improve the alignment in the related art, such that the performance of the semiconductor structure is improved.

Various elements in the first connection group132and the second connection group232may not be fused with the first conductor group131and the second conductor group231, provided that the first connection group132and the second connection group232are melted and connected, which can also ensure the pre-connection between the first chip10and the second chip20.

The first conductor group131is directly opposite to the second conductor group231, and the first connection group132is directly opposite to the second connection group232, which actually indicates the positional relationship between the first chip10and the second chip20before bonding. After bonding, that is, when the bonding structure is formed between the first conductive contact pad13and the second conductive contact pad23, the foregoing positional relationship does not necessarily exist. It is possible that a corresponding positional relationship of the materials cannot be determined due to the fusion of the materials, but the foregoing positional relationship can be determined based on the material configuration.

In some embodiments, the first connection group132and the second connection group232may include metal conductive materials, such as bismuth, cadmium, tin, lead, dysprosium and indium, and the metal conductive materials can be fused with the first conductor group131and the second conductor group231, to form metal compounds. Alternatively, the first connection group132and the second connection group232may be non-metal materials, such as silicon dioxide (SiO2), silicon oxide carbon (SiOC), silicon nitride (SiN), silicon carbon nitride (SiCN).

In some embodiments, the first conductive connection wire12and the first conductive contact pad13are both located in the first substrate11; the second conductive connection wire22and the second conductive contact pad23are both located in the second substrate21.

Alternatively, the first conductive connection wire12and the first conductive contact pad13may be partially located in the first substrate11, or the first conductive connection wire12and the first conductive contact pad13may be completely located in the first substrate11. Correspondingly, the second conductive connection wire22and the second conductive contact pad23may be partially located in the second substrate21, or may be completely located in the second substrate21.

In some embodiments, the first conductive contact pad13may be located on the surface of the first substrate11. Correspondingly, the second conductive contact pad23may be located on the surface of the second substrate21.

It should be noted that, after bonding of the first chip10and the second chip20, the first substrate11and the second substrate21are bonded. The first substrate11includes a silicon substrate and an insulating layer formed above the silicon substrate. A part of the first conductive connection wire12is located in the insulating layer, and the first conductive contact pad13is formed in the insulating layer. Correspondingly, the second substrate21includes a silicon substrate and an insulating layer formed above the silicon substrate. A part of the second conductive connection wire22is located in the insulating layer, and the second conductive contact pad23is formed in the insulating layer. During bonding of the first chip10and the second chip20, the first conductive contact pad13and the second conductive contact pad23are bonded, while the insulating layers of the first chip10and the second chip20are bonded.

Specifically, the silicon substrate may be made of a silicon-containing material. The silicon substrate may be made of any suitable material, including, for example, at least one of silicon, monocrystalline silicon, polysilicon, amorphous silicon, silicon-germanium, monocrystalline silicon-germanium, polycrystalline silicon-germanium, or carbon-doped silicon.

The insulating layer may include silicon dioxide (SiO2), silicon oxide carbon (SiOC), silicon nitride (SiN), silicon carbon nitride (SiCN), or other related integrated-circuit insulating materials.

In an embodiment, the first conductive connection wire12is a first through-silicon via; the second conductive connection wire22is a second through-silicon via. The first through-silicon via and the second through-silicon via are connected through the first conductive contact pad13and the second conductive contact pad23.

In an embodiment, a thickness of the first connection group132is less than 1 um, and a thickness of the second connection group232is less than 1 um.

With reference toFIG.1, an end of the first conductive contact pad13facing toward the second conductive contact pad23is a first contact surface14, and an end of the second conductive contact pad23facing toward the first contact surface14is a second contact surface24. The first conductor group131and the first connection group132each occupy a part of the first contact surface14; the second conductor group231and the second connection group232each occupy a part of the second contact surface24. An area occupied by the first conductor group131on the first contact surface14is larger than an area occupied by the first connection group132on the first contact surface14, and an area occupied by the second conductor group231on the second contact surface24is larger than an area occupied by the second connection group232on the second contact surface24. During bonding of the first chip10and the second chip20, the first contact surface14and the second contact surface24are connected to each other, so as to implement an electrical connection between the first conductive contact pad13and the second conductive contact pad23.

It should be noted that, the first connection group132and the second connection group232may be insulators. When the insulating layer of the first chip10is bonded with the insulating layer of the second chip20, the first connection group132and the second connection group232will also be bonded, and the bonding temperature is relatively low. The bonding between the insulating layers and the bonding between the first connection group132and the second connection group232can implement bonding and forming with one step, thus reducing bonding steps. Further, the first connection group132and the second connection group232have the same bonding temperature and are made of the same material. In some embodiments, the first connection group132and the second connection group232have the same bonding temperature and are made of the same material as the insulating layer of the first chip10and the insulating layer of the second chip20.

In this case, the first connection group132and the second connection group232may be only used for the pre-connection purpose, while the electrical connection between the first conductive contact pad13and the second conductive contact pad23relies on the connection between the first conductor group131and the second conductor group231. Therefore, in order to ensure a good conductive connection between the first conductive contact pad13and the second conductive contact pad23, the area occupied by the first conductor group131on the first contact surface14is larger than the area occupied by the first connection group132on the first contact surface14, and the area occupied by the second conductor group231on the second contact surface24is larger than the area occupied by the second connection group232on the second contact surface24.

In some embodiments, the first conductor group131and the first connection group132occupy a part of the first contact surface14, that is, the first conductive contact pad13may further include other conductors. Correspondingly, the second conductor group231and the second connection group232occupy a part of the second contact surface24, and the second conductive contact pad23may further include other conductors. The melting points of other conductors of the first conductive contact pad13and the second conductive contact pad23are not limited. The present disclosure focuses on the implementation of the pre-connection between the first chip10and the second chip20at a relatively low temperature by limiting the relationship between the melting points of the first conductor group131and first connection group132as well as the relationship between the melting points of the second conductor group231and the second connection group232.

In some embodiments, the first conductor group131and the first connection group132occupy the entire first contact surface14, that is, the first conductive contact pad13may include only the first conductor group131and the first connection group132. Alternatively, the first conductive contact pad13may include another conductor, but the conductor is not located at an end of the first conductive contact pad13which is away from the first conductive connection wire12. Correspondingly, the second conductor group231and the second connection group232occupy the entire second contact surface24, that is, the second conductive contact pad23may include only the second conductor group231and the second connection group232. Alternatively, the second conductive contact pad23may include another conductor, but the conductor is not located at an end of the second conductive contact pad23which is away from the second conductive connection wire22.

In an embodiment, the first conductor group131may include multiple conductive materials, that is, the first conductor group131may consist of a combination of different types of conductive materials. The different types of conductive materials herein are different from one metal compound, that is, the first conductor group131may include multiple single metal materials, or multiple metal compounds, or a combination of a single metal material and a metal compound. Correspondingly, for the second conductor group231, reference may be made to this embodiment, and details are not described herein again.

The first connection group132may include multiple conductive materials and/or insulating materials. That is, the first connection group132may consist of a combination of different types of materials. The different types of materials herein are different from one compound, that is, the first connection group132may include multiple single materials, or multiple compounds, or a combination of a single material and a compound. Correspondingly, for the second connection group232, reference may be made to this embodiment, and details are not described herein again.

In an embodiment, the first conductor group131includes only a first conductor, and the first connection group132includes at least one of the second conductor or the first insulator; the second conductor group231includes a third conductor, and the second connection group232includes at least one of a fourth conductor or a second insulator.

In an embodiment, an area of the first contact surface14is equal to that of the second contact surface24, that is, an area of a fusion surface of the first chip10is equal to that of a fusion surface of the second chip20. When the first conductor group131and the first connection group132occupy the entire first contact surface14, and the second conductor group231and the second connection group232occupy the entire second contact surface24, the area occupied by the first conductor group131on the first contact surface14is equal to the area occupied by the second conductor group231on the second contact surface24, and the area occupied by the first connection group132on the first contact surface14is equal to the area occupied by the second connection group232on the second contact surface24, to ensure that the first conductor group131is directly opposite to the second conductor group231, and the first connection group132is directly opposite to the second connection group232.

In some embodiments, when the area of the first contact surface14is equal to the area of the second contact surface24, the first conductor group131and the first connection group132occupy a part of the first contact surface14, and the second conductor group231and the second connection group232occupy a part of the second contact surface24, it can be ensured that the first conductor group131is directly opposite to the second conductor group231, and the first connection group132is directly opposite to the second connection group232, while other conductors in the first conductive contact pad13are directly opposite to other conductors in the second conductive contact pad23.

In an embodiment, the area of the first contact surface14is not equal to the area of the second contact surface24, that is, the area of the fusion surface of the first chip10is not equal to that of the fusion surface of the second chip20. When the first contact surface14is smaller than the area of the second contact surface24, a part of the second contact surface24will be opposite to the first substrate11. Correspondingly, when the area of the first contact surface14is larger than the area of the second contact surface24, a part of the first contact surface14will be opposite to the second substrate21.

It should be noted that, when the area of the first contact surface14is not equal to the area of the second contact surface24, for example, when the area of the first contact surface14is smaller than the area of the second contact surface24, the first conductor group131and the first connection group132may occupy the entire first contact surface14, while the second conductor group231and the second connection group232may also occupy the entire second contact surface24. In this case, it is only necessary to ensure that the first conductor group131is directly opposite to the second conductor group231, and all of the first connection group132is directly opposite to the second connection group232, while other parts including at least one of the second conductor group231and the second connection group232of the second conductive contact pad23may be directly corresponding to the first substrate11. Correspondingly, when the area of the first contact surface14is larger than the area of the second contact surface24, reference may be made to this embodiment, and details are not described herein again.

In an embodiment, a peripheral outer edge of the first contact surface14includes at least one of a straight line or a curve, and a peripheral outer edge of the second contact surface24includes at least one of a straight line or a curve. The shape of the first contact surface14and the shape of the second contact surface24may be completely the same or different. The shape of the first contact surface14and the shape of the second contact surface24may be a circle, an oval, a rectangle, or other shapes, which are not limited herein.

It should be noted that, when the area of the first contact surface14is equal to the area of the second contact surface24, the first conductor group131and the first connection group132occupy the entire first contact surface14, and the second conductor group231and the second connection group232occupy the entire second contact surface24, it indicates that the shape of the first contact surface14is completely the same as that of the second contact surface24, and the first contact surface14and the second contact surface24exactly overlap with each other.

In an embodiment, a volume occupied by the first conductor group131in the first conductive contact pad13is larger than a volume occupied by the first connection group132in the first conductive contact pad13; a volume occupied by the second conductor group231in the second conductive contact pad23is larger than a volume occupied by the second connection group232in the second conductive contact pad23. That is, materials with a low melting point account for a relatively low percentage in the first conductive contact pad13and the second conductive contact pad23. During bonding of the first chip10and the second chip20, the first connection group132and the second connection group232is used for ensure the pre-connection only, while the electrical connections from the first conductive contact pad13and the second conductive contact pad23to other structures mainly rely on the connection between the first conductor group131and the second conductor group231.

In an embodiment, one end of the first conductive connection wire12is completely connected on the first conductor group131; one end of the second conductive connection wire22is completely connected on the second conductor group231. That is, the first conductive contact pad13includes the first connection group132only at an end away from the first conductive connection wire12, and the second conductive contact pad23includes the second connection group232only at an end away from the second conductive connection wire22.

It should be noted that, one end of the first conductive connection wire12is completely connected on the first conductor group131, and one end of the second conductive connection wire22is completely connected on the second conductor group231, which can be further interpreted as follows: before bonding of the first chip10and the second chip20, one end of the first conductive connection wire12is completely connected on the first conductor group131, and one end of the second conductive connection wire22is completely connected on the second conductor group231, while after the bonding structure is formed between the first conductive contact pad13and the second conductive contact pad23, there is a possibility of fusion between conductive materials; however, the foregoing structural relationship can also be determined based on the material configuration.

In an embodiment, the first connection group132includes multiple first sub-connection sections1321, and a part of the first conductor group131is clamped between adjacent first sub-connection sections1321. That is, the first conductor group131is provided with a gap on a side away from the first conductive connection wire12, to be filled between the first sub-connection sections1321.

In an embodiment, the second connection group232includes multiple second sub-connection sections2321, and a part of the second conductor group231is clamped between adjacent second sub-connection sections2321. That is, the second conductor group231is provided with a gap on a side away from the second conductive connection wire22, to be filled between the second sub-connection sections2321.

As shown inFIG.1andFIG.3, the area of the first contact surface14is equal to the area of the second contact surface24, the first conductor group131and the first connection group132occupy the entire first contact surface14, and the second conductor group231and the second connection group232occupy the entire second contact surface24; the area occupied by the first conductor group131on the first contact surface14is larger than the area occupied by the first connection group132on the first contact surface14, and the area occupied by the second conductor group231on the second contact surface24is larger than the area occupied by the second connection group232on the second contact surface24, so as to ensure that the first conductor group131is directly opposite to the second conductor group231, and the first connection group132is directly opposite to the second connection group232. The first connection group132includes multiple first sub-connection sections1321, and the second connection group232includes multiple second sub-connection sections2321.

As shown inFIG.4, the area of the first contact surface14is equal to the area of the second contact surface24, the first conductor group131and the first connection group132occupy the entire first contact surface14, and the second conductor group231and the second connection group232occupy the entire second contact surface24; the area occupied by the first conductor group131on the first contact surface14is larger than the area occupied by the first connection group132on the first contact surface14, and the area occupied by the second conductor group231on the second contact surface24is larger than the area occupied by the second connection group232on the second contact surface24, so as to ensure that the first conductor group131is directly opposite to the second conductor group231, and the first connection group132is directly opposite to the second connection group232. The first connection group132is clamped in the first conductor group131, and the second connection group232is clamped in the second conductor group231.

In an embodiment, the material of the first conductor group131is the same as the material of the second conductor group231, where the first conductor group131includes at least one of copper or tungsten, and the second conductor group231includes at least one of copper or tungsten. Certainly, in some embodiments, it is also possible that the first conductor group131and the second conductor group231are made of different materials with approximately the same melting point.

In an embodiment, the material of the first connection group132is the same as the material of the second connection group232, where the first conductor group131includes at least one of copper or tungsten, and the first connection group132includes at least one of bismuth, cadmium, tin, lead, dysprosium or indium. Certainly, in some embodiments, it is also possible that the first connection group132and the second connection group232are made of different materials with approximately the same melting point.

In some embodiments, the material of the first connection group132is the same as the material of the second connection group232, where the first conductor group131at least one of silicon dioxide, silicon oxide carbon, silicon nitride or silicon carbide nitride, and the second connection group232includes at least one of silicon dioxide, silicon oxide carbon, silicon nitride or silicon carbide nitride.

It should be noted that, the first conductor group131and the second conductor group231each may include only a single material, for example, both the first conductor group131and the second conductor group231may be copper. Alternatively, the first conductor group131and the second conductor group231each may be an alloy, such as copper-tungsten alloy. The first connection group132and the second connection group232each may include only a single material, for example, both the first connection group132and the second connection group232may be tin. Alternatively, the first connection group132and the second connection group232each may be an alloy, such as bismuth-tin, bismuth-lead, tin-indium, etc.

In an embodiment, the first conductor group131and the second conductor group231may be copper, while the first connection group132and the second connection group232may be tin. Due to the compounding effect of tin with the low melting point and the thermal expansion effect of copper, the copper surface is slightly concave and can be fused smoothly with the tin layer having the low melting point. During fusion at a low temperature (e.g., first temperature), tin (Sn) in the upper layer is directly opposite to tin in the lower layer, and copper (Cu) in the upper layer is directly opposite to copper in the lower layer. In the fusion process, tin is fused with adjacent copper, forming a Cu5Sn6metal compound (IMC). Such a design of making the same material in the upper and lower layers opposite to each other can form a metal compound to improve the bonding strength and provide resistance against the slippage of the stacked chips (especially the alignment accuracy of the upper and lower chips) caused by an external force or movement, thus facilitating boding of the first conductive contact pad13and the second conductive contact pad23in the upper and lower layers through annealing at a relatively high temperature (e.g., second temperature), to improve the yield of the product.

In the semiconductor structure of the present disclosure, the low-melting-point metal/alloy in the upper and lower layers that are fused at a low temperature can be bonded first, and the high-strength bonding between high-melting-point metal (such as copper) can also be achieved.

An embodiment of the present disclosure further provides a method of manufacturing a semiconductor structure. Referring toFIG.5, the method of manufacturing a semiconductor structure includes:

S101: Provide a first chip10, where the first chip10includes a first substrate11, a first conductive connection wire12, and a first conductive contact pad13, the first conductive contact pad13is connected to the first conductive connection wire12, the first conductive contact pad13includes a first conductor group131and a first connection group132, and a melting point of the first conductor group131is higher than that of the first connection group132.

S103: Provide a second chip20, where the second chip20includes a second substrate21, a second conductive connection wire22, and a second conductive contact pad23, the second conductive contact pad23is connected to the second conductive connection wire22, the second conductive contact pad23includes a second conductor group231and a second connection group232, and a melting point of the second conductor group231is higher than that of the second connection group232.

S105: Align the first chip10with the second chip20, such that the first conductor group131is directly opposite to the second conductor group231, and the first connection group132is directly opposite to the second connection group232.

S107: Connect the first chip10and the second chip20.

An end of the first conductive contact pad13facing toward the second conductive contact pad23is a first contact surface14, an end of the second conductive contact pad23facing toward the first contact surface14is a second contact surface24, an area occupied by the first conductor group131on the first contact surface14is larger than an area occupied by the first connection group132on the first contact surface14, and an area occupied by the second conductor group231on the second contact surface24is larger than an area occupied by the second connection group232on the second contact surface24.

In the method of manufacturing a semiconductor structure according to an embodiment of the present disclosure, the first conductive connection wire12of the first chip10is connected to the first conductive contact pad13; the second conductive connection wire22of the second chip20is connected to the second conductive contact pad23; the first conductive contact pad13includes the first conductor group131and the first connection group132, and the second conductive contact pad23includes the second conductor group231and the second connection group232. The first conductor group131is directly opposite to the second conductor group231, the first connection group132is directly opposite to the second connection group232, the melting point of the first conductor group131is higher than that of the first connection group132, and the melting point of the second conductor group231is higher than that of the second connection group232. Therefore, the first connection group132and the second connection group232can be melted and connected at a first temperature, thus implementing a pre-connection between the first conductive contact pad13and the second conductive contact pad23. Then, the pre-connected first chip10and the pre-connected second chip20are transferred to an annealing condition at a second temperature for bonding, to achieve reliable bonding between the first conductive contact pad13and the second conductive contact pad23. Because the first chip10and the second chip20have been pre-connected before being transferred, relative movement between the first chip10and the second chip20is avoided, which ensures the subsequent alignment of the first chip10and the second chip20to be reliable, thereby improving the performance of the semiconductor structure.

In an embodiment, the connecting the first chip10and the second chip20includes: melting the first connection group132and the second connection group232at the first temperature, such that the first chip10and the second chip20are connected, where the first temperature is lower than the melting points of the first conductor group131and the second conductor group231. That is, at the first temperature, the first connection group132and the second connection group232are melted, while the first conductor group131and the second conductor group231are not melted. In this case, the conductive materials of the first conductive contact pad13and the second conductive contact pad23can be interpenetrated and fused at the interface, thus forming a pre-bonding structure.

In an embodiment, the connecting the first chip10and the second chip20further includes: boding the connected first chip10and the connected second chip20under an annealing condition at a second temperature, such that a bonding structure is formed after the first conductive contact pad13and the second conductive contact pad23are melted, where the first temperature is lower than the second temperature. The first conductive contact pad13and the second conductive contact pad23form a pre-bonding structure at the first temperature, so as to be bonded after being moved to an environment with the second temperature, which can avoid relative slippage between the first chip10and the second chip20, thereby improving the yield of the semiconductor structure.

It should be noted that, the specific process of bonding the first chip10and the second chip20under the annealing condition at the second temperature is not limited. Reference can be made to the bonding method in the related art. The focus herein is that the first chip10and the second chip20have been pre-connected before bonding under the annealing condition at the second temperature.

In an embodiment, the first connection group132is formed on the first conductor group131through electroplating or printing; the second connection group232is formed on the second conductor group231through electroplating or printing.

It should be noted that, in an embodiment, the method of manufacturing a semiconductor structure is used for forming the semiconductor structure described above. For the materials and structures of the first chip10and the second chip20in the method of manufacturing a semiconductor structure, reference can be made to the specific description of the foregoing semiconductor structure, and details are not described herein again.

Those skilled in the art may easily figure out other implementations of the present disclosure after considering the specification and practicing the invention disclosed herein. The present disclosure is intended to cover any variations, purposes or applicable changes of the present disclosure. Such variations, purposes or applicable changes follow the general principle of the present disclosure and include common knowledge or conventional technical means in the technical field which is not disclosed in the present disclosure. The specification and implementations are merely considered as illustrative, and the real scope and spirit of the present disclosure are directed by the appended claims.

It should be noted that, the present disclosure is not limited to the precise structures that have been described above and shown in the accompanying drawings, and can be modified and changed in many ways without departing from the scope of the present disclosure. The scope of the present disclosure is defined by the appended claims.