A package structure includes a redistribution layer having a first surface, a second surface disposed opposite to the first surface, and at least one sidewall connected to the first surface and the second surface, at least one bonding electrode disposed on the first surface of the redistribution layer, and a mounting layer disposed on the second surface of the redistribution layer. The mounting layer includes a plurality of conductive pads that are spaced apart from each other. At least one of the conductive pads is exposed by the sidewall of the redistribution layer.

A package structure includes a redistribution layer, at least one bonding electrode, and a mounting layer. The redistribution layer has a first surface, a second surface disposed opposite to the first surface, and at least one sidewall connected to the first surface and the second surface. The bonding electrode is disposed on the first surface of the redistribution layer. The mounting layer is disposed on the second surface of the redistribution layer. The mounting layer includes a plurality of conductive pads spaced apart from each other, wherein at least one of the conductive pads is exposed by the sidewall of the redistribution layer.

A film-type semiconductor package includes a metal lead portion arranged on a film substrate, a semiconductor chip including a pad, and a bump connecting the metal lead portion to the pad of the semiconductor chip. The bump includes a metal pillar arranged on the pad and including a first metal and a soldering portion arranged on an entire surface of the metal pillar, bonded to the metal lead portion, and including the first metal and a second metal that is different from the first metal.

An apparatus includes a non-planar semiconductor body; and a contact for the semiconductor body. The contact includes an epitaxial material that is formed on and contacts the semiconductor body. The contact includes a second material that is formed on and contacts the epitaxial material; and the second material at least partially conforms to an undercut of the epitaxial material.

A method of bonding a first substrate to a second substrate, wherein the first substrate includes first electrical contacts on a top surface of the first substrate, and wherein the second substrate includes second electrical contacts on a bottom surface of the second substrate. The method includes forming a block of polyimide on the top surface of the first substrate, wherein the block of polyimide has a rounded upper corner, and vertically moving the top surface of the first substrate and the bottom surface of the second substrate toward each other until the first electrical contacts abut the second electrical contacts, wherein during the moving, the second substrate makes contact with the rounded upper corner of the polyimide causing the first and second substrates to move laterally relative to each other.

A film-type semiconductor package includes a metal lead portion arranged on a film substrate, a semiconductor chip including a pad, and a bump connecting the metal lead portion to the pad of the semiconductor chip. The bump includes a metal pillar arranged on the pad and including a first metal and a soldering portion arranged on an entire surface of the metal pillar, bonded to the metal lead portion, and including the first metal and a second metal that is different from the first metal.

A wafer-level semiconductor die attachment method includes placing a semiconductor die of a plurality of semiconductor dies at an initial placement position to overlap a sub-mount pad on a sub-mount of a pre-singulated wafer. A die pad of the semiconductor die comes in contact with a solder layer deposited over the sub-mount pad. The semiconductor die and the sub-mount include a plurality of die and sub-mount mating features, respectively. The solder layer is heated locally to temporarily hold the semiconductor die at the initial placement position. The pre-singulated wafer is reflowed, when each semiconductor die is temporarily held at the corresponding initial placement position. During reflow, each semiconductor die slides from the initial placement position and a contact is established between the corresponding plurality of die and sub-mount mating features. Thereby, each semiconductor die is permanently attached to the corresponding sub-mount.

A junction structure for electronic device having an excellent bonding strength is provided. A junction structure for electronic device in accordance with one aspect of the present invention includes a first metal layer containing nickel and a second metal layer containing gold, tin, and nickel, while the second metal layer includes an AuSn eutectic phase.

A method of bonding a first substrate to a second substrate, wherein the first substrate includes first electrical contacts on a top surface of the first substrate, and wherein the second substrate includes second electrical contacts on a bottom surface of the second substrate. The method includes forming a block of polyimide on the top surface of the first substrate, wherein the block of polyimide has a rounded upper corner, and vertically moving the top surface of the first substrate and the bottom surface of the second substrate toward each other until the first electrical contacts abut the second electrical contacts, wherein during the moving, the second substrate makes contact with the rounded upper corner of the polyimide causing the first and second substrates to move laterally relative to each other.

A package structure includes a redistribution layer, at least one bonding electrode, and a mounting layer. The redistribution layer has a first surface, a second surface disposed opposite to the first surface, and at least one sidewall connected to the first surface and the second surface. The bonding electrode is disposed on the first surface of the redistribution layer. The mounting layer is disposed on the second surface of the redistribution layer. The mounting layer includes a plurality of conductive pads spaced apart from each other, wherein at least one of the conductive pads is exposed by the sidewall of the redistribution layer.