A chip package structure is provided. The chip package structure includes a first wiring substrate including a substrate, a first pad, a second pad, and an insulating layer. The chip package structure includes a nickel-containing layer over the first pad. The chip package structure includes a conductive protection layer over the nickel-containing layer. The conductive protection layer includes tin, and a recess is surrounded by the conductive protection layer and the insulating layer over the first pad. The chip package structure includes a chip over the second surface of the substrate. The chip package structure includes a conductive bump between the second pad and the chip.

A method for forming a chip package structure is provided. The method includes providing a wiring substrate. The method includes sequentially forming a nickel-containing layer and a gold-containing layer over the first pad. The method includes forming a conductive protection layer covering the gold-containing layer over the nickel-containing layer. The method includes bonding a chip to the wiring substrate through a conductive bump and a flux layer surrounding the conductive bump. The conductive bump is between the second pad and the chip. The method includes removing the flux layer while the conductive protection layer covers the nickel-containing layer.

A method for forming a chip package structure is provided. The method includes providing a wiring substrate. The method includes sequentially forming a nickel-containing layer and a gold-containing layer over the first pad. The method includes forming a conductive protection layer covering the gold-containing layer over the nickel-containing layer. The method includes bonding a chip to the wiring substrate through a conductive bump and a flux layer surrounding the conductive bump. The conductive bump is between the second pad and the chip. The method includes removing the flux layer while the conductive protection layer covers the nickel-containing layer.

The purpose is, in mounting a semiconductor device onto a substrate, to make it easy to identify the remaining amount of an auxiliary joining agent, to stabilize the dispensing amount of the auxiliary joining agent, and to prevent a shortage of the auxiliary joining agent. Also for the purpose of efficient maintenance of a mounting machine, provided is an auxiliary joining agent adapted to aid joining of metals and prepared by dissolving a colorant in a solvent having a reducing property of removing an oxide film on a metal surface. The auxiliary joining agent is produced by a method including a step of mixing a solvent having a reducing property of removing an oxide film on a metal surface, and a colorant having a property of dissolving in the solvent.

A chip package structure is provided. The chip package structure includes a first wiring substrate including a substrate, a first pad, a second pad, and an insulating layer. The chip package structure includes a nickel-containing layer over the first pad. The chip package structure includes a conductive protection layer over the nickel-containing layer. The conductive protection layer includes tin, and a recess is surrounded by the conductive protection layer and the insulating layer over the first pad. The chip package structure includes a chip over the second surface of the substrate. The chip package structure includes a conductive bump between the second pad and the chip.

A chip package structure is provided. The chip package structure includes a first wiring substrate comprising a substrate, a first pad, a second pad, and an insulating layer. The first pad and the second pad are respectively over a first surface and a second surface of the substrate, the first surface is opposite to the second surface, the insulating layer is over the first surface and partially covers the first pad, and the first pad is wider than the second pad. The chip package structure includes a nickel-containing layer over the first pad. The chip package structure includes a conductive protection layer over the nickel-containing layer. The conductive protection layer has a curved surface, and a recess is surrounded by the curved surface and an inner wall of the insulating layer over the first pad.

The purpose is, in mounting a semiconductor device onto a substrate, to make it easy to identify the remaining amount of an auxiliary joining agent, to stabilize the dispensing amount of the auxiliary joining agent, and to prevent a shortage of the auxiliary joining agent. Also for the purpose of efficient maintenance of a mounting machine, provided is an auxiliary joining agent adapted to aid joining of metals and prepared by dissolving a colorant in a solvent having a reducing property of removing an oxide film on a metal surface. The auxiliary joining agent is produced by a method including a step of mixing a solvent having a reducing property of removing an oxide film on a metal surface, and a colorant having a property of dissolving in the solvent.

Methods for improving thermal performance, such as thermal dissipation, of flip chip packages that include one or more flip chip dies are disclosed. In some embodiments, a thermal collection layer can be formed on a surface of a flip chip die. The thermal collection layer can be configured to dissipate heat generated by the flip chip die. In some variations, the thermal collection layer can be constructed using materials having high thermal conductivity.

A chip package structure is provided. The chip package structure includes a first wiring substrate comprising a substrate, a first pad, a second pad, and an insulating layer. The first pad and the second pad are respectively over a first surface and a second surface of the substrate, the first surface is opposite to the second surface, the insulating layer is over the first surface and partially covers the first pad, and the first pad is wider than the second pad. The chip package structure includes a nickel-containing layer over the first pad. The chip package structure includes a conductive protection layer over the nickel-containing layer. The conductive protection layer has a curved surface, and a recess is surrounded by the curved surface and an inner wall of the insulating layer over the first pad.

A chip package structure is provided. The chip package structure includes. The chip package structure includes a first wiring substrate including a substrate, a first pad, a second pad, and an insulating layer. The chip package structure includes a chip bonded to the second pad. The chip package structure includes a nickel-containing layer under the first pad. The chip package structure includes. a conductive protection layer under the nickel-containing layer. The conductive protection layer has a curved bottom surface, the curved bottom surface is higher than a bottom surface of the insulating layer, and the curved bottom surface and the bottom surface face away from the substrate.