Disclosed are an electrical connection method for an electronic element, and a backlight module, a display panel, and a display apparatus which include an electronic element to which the electrical connection method is applied. The electrical connection method comprises: providing a driving back plane, wherein the driving back plane comprises multiple contact electrodes; forming an anti-oxidation protection film on the contact electrodes; coating a position of the anti-oxidation protection film corresponding to each contact electrode with a binding material; and transferring multiple electronic elements to the positions of the corresponding contact electrodes, binding each electronic element to the corresponding contact electrode, and removing the anti-oxidation protection film at the position of each contact electrode before completing the binding of each electronic element to the corresponding contact electrode.

Manufacturing of flip-chip type assemblies is provided, and includes forming one or more contact elements of electrically conductive material on a carrier surface of at least one chip carrier, providing a restrain structure around the contact elements, depositing solder material on the contact elements and/or on one or more terminals of electrically conductive material on a chip surface of at least one integrated circuit chip, and placing the chip with each terminal facing corresponding contact elements. Further, the method includes soldering each terminal to the corresponding contact element by a soldering material, the soldering material being restrained during a soldering of the terminals to the contact elements by the restrain structure, and forming one or more heat dissipation elements of thermally conductive material on the carrier surface for facing the chip surface displaced from the terminals, where the one or more heat dissipation elements are free of any solder mask.

Embodiments relate to using nanoporous metal tips to establish connections between a first body and a second body. The first body is positioned relative to the second body to align contacts protruding from a first surface of the first body with electrodes protruding from a second surface of the second body. The second surface faces the first surface. The contacts, the electrodes, or both comprise nanoporous metal tips. A relative movement is made between the first body and the second body after positioning the first body to approach the first body to the second body. The contacts and the electrodes are bonded by melting and solidifying the nanoporous metal tips after approaching the first body and the second body.

Embodiments relate to using nanoporous metal tips to establish connections between a first body and a second body. The first body is positioned relative to the second body to align contacts protruding from a first surface of the first body with electrodes protruding from a second surface of the second body. The second surface faces the first surface. The contacts, the electrodes, or both comprise nanoporous metal tips. A relative movement is made between the first body and the second body after positioning the first body to approach the first body to the second body. The contacts and the electrodes are bonded by melting and solidifying the nanoporous metal tips after approaching the first body and the second body.

A contoured package on package joint and a method for making the same are disclosed herein. A method for forming a device comprises providing a substrate having a package land and forming a mounting stud on the package land. A molded underfill is applied to the substrate and in contact with the mounting stud. A contoured stud surface is formed on the mounting stud is contoured and connecting member attached to the contoured stud surface with a second package attached to the connecting member. The connecting member may be solder and have a spherical shape. The contoured stud surface may be etched or mechanically formed to have a hemispherical shape conforming to the connecting member shape.

A solution relating to electronic devices of flip-chip type is provided, which includes at least one chip carrier having a carrier surface, the carrier(s) including one or more contact elements of electrically conductive material on the carrier surface, at least one integrated circuit chip having a chip surface, the chip(s) including one or more terminals of electrically conductive material on the chip surface each one facing a corresponding contact element, solder material soldering each terminal to the corresponding contact element, and a restrain structure around the contact elements for restraining the solder material during a soldering of the terminals to the contact elements. The carrier includes one or more heat dissipation elements of thermally conductive material on the carrier surface facing the chip surface displaced from the terminals, the dissipation elements being free of any solder mask.

Manufacturing of flip-chip type assemblies is provided, and includes forming one or more contact elements of electrically conductive material on a carrier surface of at least one chip carrier, providing a restrain structure around the contact elements, depositing solder material on the contact elements and/or on one or more terminals of electrically conductive material on a chip surface of at least one integrated circuit chip, and placing the chip with each terminal facing corresponding contact elements. Further, the method includes soldering each terminal to the corresponding contact element by a soldering material, the soldering material being restrained during a soldering of the terminals to the contact elements by the restrain structure, and forming one or more heat dissipation elements of thermally conductive material on the carrier surface for facing the chip surface displaced from the terminals, where the one or more heat dissipation elements are free of any solder mask.

A contoured package on package joint and a method for making the same are disclosed herein. A method for forming a device comprises providing a substrate having a package land and forming a mounting stud on the package land. A molded underfill is applied to the substrate and in contact with the mounting stud. A contoured stud surface is formed on the mounting stud is contoured and connecting member attached to the contoured stud surface with a second package attached to the connecting member. The connecting member may be solder and have a spherical shape. The contoured stud surface may be etched or mechanically formed to have a hemispherical shape conforming to the connecting member shape.

A contoured package on package joint and a method for making the same are disclosed herein. A method for forming a device comprises providing a substrate having a package land and forming a mounting stud on the package land. A molded underfill is applied to the substrate and in contact with the mounting stud. A contoured stud surface is formed on the mounting stud is contoured and connecting member attached to the contoured stud surface with a second package attached to the connecting member. The connecting member may be solder and have a spherical shape. The contoured stud surface may be etched or mechanically formed to have a hemispherical shape conforming to the connecting member shape.

Package-On-Package (PoP) structures that includes stud bulbs is provided. According to an embodiment, a POP structure includes a first substrate, stud bulbs, a die, a second substrate, and electrical connectors. The stud bulbs are coupled to a first surface of the first substrate. The die is attached to the first surface of the first substrate. The electrical connectors are coupled to the second substrate, and respective ones of the electrical connectors are coupled to respective ones of the stud bulbs.