Abstract: A line trough and a via cavity are formed within a dielectric layer comprising a fluorosilicate glass (FSG) layer. A fluorine depleted adhesion layer is formed within the line trough and the via cavity either by a plasma treatment that removes fluorine from exposed surfaces of the FSG layer, or by deposition of a substantially fluorine-free dielectric layer. Metal is deposited within the line trough and the via cavity to form a metal line and a metal via. The fluorine depleted adhesion layer provides enhanced adhesion to the metal line compared with prior art structures in which a metal line directly contacts a FSG layer. The enhanced adhesion of metal with an underlying dielectric layer provides higher resistance to delamination for a semiconductor package employing lead-free C4 balls on a metal interconnect structure.

Abstract: A first metallic diffusion barrier layer is formed on a last level metal plate exposed in an opening of a passivation layer. Optionally, a metallic adhesion promotion layer is formed on the first metallic diffusion barrier layer. An elemental metal conductive layer is formed on the metallic adhesion promotion layer, which provides a highly conductive structure that distributes current uniformly due to the higher electrical conductivity of the material than the layers above or below. A stack of the second metallic diffusion barrier layer and a wetting promotion layer is formed, on which a C4 ball is bonded. The elemental metal conductive layer distributes the current uniformly within the underbump metallurgy structure, which induces a more uniform current distribution in the C4 ball and enhanced electromigration resistance of the C4 ball.

Abstract: A method is disclosed which includes patterning a photoresist layer on a substrate of a structure, removing a first portion of the photoresist layer to expose a first area of the substrate, etching the first area to form a cavity having a first depth, removing a second portion of the photoresist to expose an additional area of the substrate, and etching the cavity to expose a first conductor in the structure and the additional area to expose a second conductor in the structure.

Abstract: A method includes patterning a photoresist layer on a structure to define an opening and expose a first planar area on a substrate layer, etching the exposed planar area to form a cavity having a first depth in the structure, removing a second portion of the photoresist to expose a second planar area on the substrate layer, forming a doped portion in the second planar area, and etching the cavity to expose a first conductor in the structure and the doped portion to expose a second conductor in the structure.

Abstract: Disclosed is a semiconductor device wherein an insulation layer has a copper plug in contact with the last wiring layer of the device. There may also be a barrier layer separating the copper plug from the insulation layer. In a further embodiment, there may also be an aluminum layer between the insulation layer and copper plug. Also disclosed is a process for making the semiconductor device.

Abstract: A method of implementing three-dimensional (3D) integration of multiple integrated circuit (IC) devices includes forming a first insulating layer over a first IC device; forming a second insulating layer over a second IC device; forming a 3D, bonded IC device by aligning and bonding the first insulating layer to the second insulating layer so as to define a bonding interface therebetween, defining a first set of vias within the 3D bonded IC device, the first set of vias landing on conductive pads located within the first IC device, and defining a second set of vias within the 3D bonded IC device, the second set of vias landing on conductive pads located within the second device, such that the second set of vias passes through the bonding interface; and filling the first and second sets of vias with a conductive material.

Abstract: A first metallic diffusion barrier layer is formed on a last level metal plate exposed in an opening of a passivation layer. Optionally, a metallic adhesion promotion layer is formed on the first metallic diffusion barrier layer. An elemental metal conductive layer is formed on the metallic adhesion promotion layer, which provides a highly conductive structure that distributes current uniformly due to the higher electrical conductivity of the material than the layers above or below. A stack of the second metallic diffusion barrier layer and a wetting promotion layer is formed, on which a C4 ball is bonded. The elemental metal conductive layer distributes the current uniformly within the underbump metallurgy structure, which induces a more uniform current distribution in the C4 ball and enhanced electromigration resistance of the C4 ball.

Abstract: A line trough and a via cavity are formed within a dielectric layer comprising a fluorosilicate glass (FSG) layer. A fluorine depleted adhesion layer is formed within the line trough and the via cavity either by a plasma treatment that removes fluorine from exposed surfaces of the FSG layer, or by deposition of a substantially fluorine-free dielectric layer. Metal is deposited within the line trough and the via cavity to form a metal line and a metal via. The fluorine depleted adhesion layer provides enhanced adhesion to the metal line compared with prior art structures in which a metal line directly contacts a FSG layer. The enhanced adhesion of metal with an underlying dielectric layer provides higher resistance to delamination for a semiconductor package employing lead-free C4 balls on a metal interconnect structure.