Abstract:
Solder bump connections and methods for fabricating solder bump connections. The method includes forming a layer stack containing first and second conductive layers, forming a dielectric passivation layer on a top surface of the second conductive layer, and forming a via opening extending through the dielectric passivation layer to the top surface of the second conductive layer. The method further includes forming a conductive plug in the via opening. The solder bump connection includes first and second conductive layers comprised of different conductors, a dielectric passivation layer on a top surface of the second conductive layer, a via opening extending through the dielectric passivation layer to the top surface of the second conductive layer, and a conductive plug in the via opening.
Abstract:
A method of fabricating a semiconductor device includes forming a passivation layer on a least one capping layer of the semiconductor device, and forming an encapsulant layer on the passivation layer. The method further includes patterning the encapsulant layer to expose a portion of the passivation layer and forming a final via opening in the passivation layer. A conductive material is deposited in the final via opening. The method further includes planarizing the conductive material until reaching a remaining portion of the encapsulant layer such that the conductive material is flush with the encapsulant layer and the passivation layer is preserved.
Abstract:
Structures and methods to reduce maximum current density in a solder ball are disclosed. A method includes forming a contact pad in a last wiring level and forming a plurality of wires of the contact pad extending from side edges of the contact pad to respective ones of a plurality of vias. Each one of the plurality of wires has substantially the same electrical resistance.
Abstract:
A solder bump support structure and method of manufacturing thereof is provided. The solder bump support structure includes an inter-level dielectric (ILD) layer formed over a silicon substrate. The ILD layer has a plurality of conductive vias. The structure further includes a first insulation layer formed on the ILD layer. The solder bump support structure further includes a pedestal member formed on the ILD layer which includes a conductive material formed above the plurality of conductive vias in the ILD layer coaxially surrounded by a second insulation layer. The second insulation layer is thicker than the first insulation layer. The structure further includes a capping under bump metal (UBM) layer formed over, and in electrical contact with, the conductive material and formed over at least a portion of the second insulation layer of the pedestal member.