A semiconductor structure includes a first semiconductor structure and a second semiconductor structure. The first semiconductor structure includes a first via structure in a first dielectric layer, the first via structure including a first contact via surface. At least a portion of the first via structure is in direct contact with the first dielectric layer. The second semiconductor structure includes a second via structure in a second dielectric layer, the second via structure including a second contact via surface. At least a portion of the second via structure is in direct contact with the second dielectric layer. The first contact via surface is bonded with the second contact via surface. The second contact via surface and the first contact via surface have an overlapping interface in the vertical direction. A first barrier layer is formed at a non-overlapping interface in the first contact via surface and the second contact via surface. The first barrier layer contains a multi-component oxide.

A semiconductor structure includes a first semiconductor structure and a second semiconductor structure. The first semiconductor structure includes a first via structure in a first dielectric layer, the first via structure including a first contact via surface. At least a portion of the first via structure is in direct contact with the first dielectric layer. The second semiconductor structure includes a second via structure in a second dielectric layer, the second via structure including a second contact via surface. At least a portion of the second via structure is in direct contact with the second dielectric layer. The first contact via surface is bonded with the second contact via surface. The second contact via surface and the first contact via surface have an overlapping interface in the vertical direction. A first barrier layer is formed at a non-overlapping interface in the first contact via surface and the second contact via surface. The first barrier layer contains a multi-component oxide.

In one embodiment, a semiconductor device includes a substrate, a first interconnection provided above the substrate, and a first pad provided on the first interconnection. The device further includes a second pad provided on the first pad, and a second interconnection provided on the second pad. Furthermore, the first pad includes a first layer provided in a first insulator above the substrate, and a second layer that is provided in the first insulator via the first layer and is in contact with the first interconnection, or the second pad includes a third layer provided in a second insulator above the substrate, and a fourth layer that is provided in the second insulator via the third layer and is in contact with the second interconnection.

In one embodiment, a semiconductor device includes a substrate, a first interconnection provided above the substrate, and a first pad provided on the first interconnection. The device further includes a second pad provided on the first pad, and a second interconnection provided on the second pad. Furthermore, the first pad includes a first layer provided in a first insulator above the substrate, and a second layer that is provided in the first insulator via the first layer and is in contact with the first interconnection, or the second pad includes a third layer provided in a second insulator above the substrate, and a fourth layer that is provided in the second insulator via the third layer and is in contact with the second interconnection.

A hybrid wafer bonding method includes providing a first semiconductor structure and providing a second semiconductor structure. The first semiconductor structure includes a first substrate, a first dielectric, and a first via structure. The first via structure includes a first contact via and first metal impurities doped in the first contact via. The second semiconductor structure includes a second substrate, a second dielectric layer, and a second via structure. The second via structure includes a second contact via and second metal impurities doped in the second contact via. The method further includes bonding the first semiconductor structure with the second semiconductor and forming a self-barrier layer by an alloying process. The self-barrier layer is formed by a multi-component oxide corresponding to the first and second metal impurities.

A hybrid wafer bonding method includes providing a first semiconductor structure and providing a second semiconductor structure. The first semiconductor structure includes a first substrate, a first dielectric, and a first via structure. The first via structure includes a first contact via and first metal impurities doped in the first contact via. The second semiconductor structure includes a second substrate, a second dielectric layer, and a second via structure. The second via structure includes a second contact via and second metal impurities doped in the second contact via. The method further includes bonding the first semiconductor structure with the second semiconductor and forming a self-barrier layer by an alloying process. The self-barrier layer is formed by a multi-component oxide corresponding to the first and second metal impurities.

Disclosed is a method for transient liquid-phase bonding between metal materials using a magnetic force. In particular, in the method, a magnetic force is applied to a transient liquid-phase bonding process, thereby shortening a transient liquid-phase bonding time between the metal materials, and obtaining high bonding strength. To this end, an attractive magnetic force is applied to a ferromagnetic base while a repulsive magnetic force is applied to a diamagnetic base, thereby to accelerate diffusion. This may reduce a bonding time during a transient liquid-phase bonding process between two bases and suppress formation of Kirkendall voids and voids and suppress a layered structure of an intermetallic compound, thereby to increase a bonding strength.

Disclosed is a method for transient liquid-phase bonding between metal materials using a magnetic force. In particular, in the method, a magnetic force is applied to a transient liquid-phase bonding process, thereby shortening a transient liquid-phase bonding time between the metal materials, and obtaining high bonding strength. To this end, an attractive magnetic force is applied to a ferromagnetic base while a repulsive magnetic force is applied to a diamagnetic base, thereby to accelerate diffusion. This may reduce a bonding time during a transient liquid-phase bonding process between two bases and suppress formation of Kirkendall voids and voids and suppress a layered structure of an intermetallic compound, thereby to increase a bonding strength.

In one embodiment, a semiconductor device includes a substrate, a first interconnection provided above the substrate, and a first pad provided on the first interconnection. The device further includes a second pad provided on the first pad, and a second interconnection provided on the second pad. Furthermore, the first pad includes a first layer provided in a first insulator above the substrate, and a second layer that is provided in the first insulator via the first layer and is in contact with the first interconnection, or the second pad includes a third layer provided in a second insulator above the substrate, and a fourth layer that is provided in the second insulator via the third layer and is in contact with the second interconnection.

In one embodiment, a semiconductor device includes a substrate, a first interconnection provided above the substrate, and a first pad provided on the first interconnection. The device further includes a second pad provided on the first pad, and a second interconnection provided on the second pad. Furthermore, the first pad includes a first layer provided in a first insulator above the substrate, and a second layer that is provided in the first insulator via the first layer and is in contact with the first interconnection, or the second pad includes a third layer provided in a second insulator above the substrate, and a fourth layer that is provided in the second insulator via the third layer and is in contact with the second interconnection.