A packaging structure includes a first substrate including a first metal terminal and a first protruding resin portion formed at a first surface; a second substrate including a second metal terminal and a second protruding resin portion formed at a second surface, the second metal terminal being made of the same kind of metal as the first metal terminal; and a sealing portion filled between the first surface of the first substrate and the second surface of the second substrate, the first metal terminal and the second metal terminal being directly bonded with each other, the first protruding resin portion and the second protruding resin portion being directly bonded with each other, each of the first protruding resin portion and the second protruding resin portion being made of a resin material that does not include fillers, and the sealing portion being made of a resin material including fillers.

A bump structure includes a pad. A passivation layer covers a perimeter of the pad. The passivation layer includes an opening exposing an area of the pad. A first portion is disposed on the pad. The first portion includes a top surface and a sidewall. A second portion covers the top surface and entire sidewall of the first portion.

A bump structure includes a pad. A passivation layer covers a perimeter of the pad. The passivation layer includes an opening exposing an area of the pad. A first portion is disposed on the pad. The first portion includes a top surface and a sidewall. A second portion covers the top surface and entire sidewall of the first portion.

3D joining of microelectronic components and a conductively self-adjusting anisotropic matrix are provided. In an implementation, an adhesive matrix automatically makes electrical connections between two surfaces that have electrical contacts, and bonds the two surfaces together. Conductive members in the adhesive matrix are aligned to automatically establish electrical connections between at least partially aligned contacts on each of the two surfaces while providing nonconductive adhesion between parts of the two surfaces lacking aligned contacts. An example method includes forming an adhesive matrix between two surfaces to be joined, including conductive members anisotropically aligned in an adhesive medium, then pressing the two surfaces together to automatically connect corresponding electrical contacts that are at least partially aligned on the two surfaces. The adhesive medium in the matrix secures the two surfaces together.

3D joining of microelectronic components and a conductively self-adjusting anisotropic matrix are provided. In an implementation, an adhesive matrix automatically makes electrical connections between two surfaces that have electrical contacts, and bonds the two surfaces together. Conductive members in the adhesive matrix are aligned to automatically establish electrical connections between at least partially aligned contacts on each of the two surfaces while providing nonconductive adhesion between parts of the two surfaces lacking aligned contacts. An example method includes forming an adhesive matrix between two surfaces to be joined, including conductive members anisotropically aligned in an adhesive medium, then pressing the two surfaces together to automatically connect corresponding electrical contacts that are at least partially aligned on the two surfaces. The adhesive medium in the matrix secures the two surfaces together.

A packaging structure includes a first substrate including a first metal terminal and a first protruding resin portion formed at a first surface; a second substrate including a second metal terminal and a second protruding resin portion formed at a second surface, the second metal terminal being made of the same kind of metal as the first metal terminal; and a sealing portion filled between the first surface of the first substrate and the second surface of the second substrate, the first metal terminal and the second metal terminal being directly bonded with each other, the first protruding resin portion and the second protruding resin portion being directly bonded with each other, each of the first protruding resin portion and the second protruding resin portion being made of a resin material that does not include fillers, and the sealing portion being made of a resin material including fillers.

A packaging structure includes a first substrate including a first metal terminal and a first protruding resin portion formed at a first surface; a second substrate including a second metal terminal and a second protruding resin portion formed at a second surface, the second metal terminal being made of the same kind of metal as the first metal terminal; and a sealing portion filled between the first surface of the first substrate and the second surface of the second substrate, the first metal terminal and the second metal terminal being directly bonded with each other, the first protruding resin portion and the second protruding resin portion being directly bonded with each other, each of the first protruding resin portion and the second protruding resin portion being made of a resin material that does not include fillers, and the sealing portion being made of a resin material including fillers.

A packaging structure includes a first substrate including a first metal terminal and a second metal terminal whose height is lower than the height of the first metal terminal; and a second substrate including a third metal terminal and a fourth metal terminal whose height is lower than the height of the third metal terminal, the second substrate being provided on the first substrate, the first metal terminal and the third metal terminal being directly bonded with each other, and the second metal terminal and the fourth metal terminal being bonded via a connection portion.

A packaging structure includes a first substrate including a first metal terminal and a second metal terminal whose height is lower than the height of the first metal terminal; and a second substrate including a third metal terminal and a fourth metal terminal whose height is lower than the height of the third metal terminal, the second substrate being provided on the first substrate, the first metal terminal and the third metal terminal being directly bonded with each other, and the second metal terminal and the fourth metal terminal being bonded via a connection portion.

A method for attaching an integrated circuit (IC) to an IC package substrate includes forming a solder bump on a bond pad of an IC die, forming a solder-wetting protrusion on a bond pad of an IC package substrate, and bonding the solder bump of the IC die to the solder-wetting protrusion of the IC package substrate.