Abstract:
It is a general object of the present invention to provide an improved method of fabrication in the formation of an improved copper metal diffusion barrier layer having the structure, W/WSiN/WN, in single and dual damascene interconnect trench/contact via processing with 0.10 micron nodes for MOSFET and CMOS applications. The diffusion barrier is formed by depositing a tungsten nitride bottom layer, followed by an in situ SiH4/NH3 or SiH4/H2 soak forming a WSiN layer, and depositing a final top layer of tungsten. This invention is used to manufacture reliable metal interconnects and contact vias in the fabrication of MOSFET and CMOS devices for both logic and memory applications and the copper diffusion barrier formed, W/WSiN/WN, passes a stringent barrier thermal reliability test at 400° C. Pure single barrier layers, i.e., single layer WN, exhibit copper punch through or copper spiking during the stringent barrier thermal reliability test at 400° C.
Abstract:
Within a damascene method for forming a patterned conductor layer within an aperture defined by a patterned dielectric layer within a microelectronic fabrication, at least one of: (1) the patterned dielectric layer is thermally annealed at a temperature of from about 300 to about 450 degrees centigrade prior to forming within the aperture the patterned conductor layer; and (2) the aperture is etched with a plasma employing an etchant gas composition comprising hydrogen to form a laterally enlarged aperture prior to forming within the laterally enlarged aperture the patterned conductor layer. In accord with the method, the microelectronic fabrication is formed with decreased contact resistance and enhanced structural integrity.
Abstract:
A method for performing grinding includes selecting a target wheel loading for wafer grinding processes, and performing a grinding process on a wafer. With the proceeding of the grinding process, wheel loadings of the grinding process are measured. The grinding process is stopped after the target wheel loading is reached. The method alternatively includes selecting a target reflectivity of wafer grinding processes, and performing a grinding process on a wafer. With a proceeding of the grinding process, reflectivities of a light reflected from a surface of the wafer are measured. The grinding process is stopped after one of the reflectivities reaches the target reflectivity.
Abstract:
A method includes bonding a first and a second package component on a top surface of a third package component, and dispensing a polymer. The polymer includes a first portion in a space between the first and the third package components, a second portion in a space between the second and the third package components, and a third portion in a gap between the first and the second package components. A curing step is then performed on the polymer. After the curing step, the third portion of the polymer is sawed to form a trench between the first and the second package components.
Abstract:
A system and method for stacking semiconductor devices in three dimensions is provided. In an embodiment two or more semiconductor dies are attached to a carrier and encapsulated. Connections of the two or more semiconductor dies are exposed, and the two or more semiconductor dies may be thinned to form connections on an opposite side. Additional semiconductor dies may then be placed in either an offset or overhanging position.
Abstract:
A method includes forming a first oxide layer on a surface of an integrated heat spreader, and forming a second oxide layer on top surfaces of fins, wherein the fins are parts of a heat sink. The integrated heat spreader is bonded to the heat sink through the bonding of the first oxide layer to the second oxide layer.
Abstract:
A work piece includes a first copper-containing pillar having a top surface and sidewalls, and a first protection layer on the sidewalls, and not over the top surface, of the first copper-containing pillar. A test pad includes a second copper-containing pillar having a top surface and sidewalls. The test pad is electrically coupled to the first copper-containing pillar. A second protection layer is disposed on the sidewalls, and not over the top surface, of the second copper-containing pillar. The first and the second protection layers include a compound of copper and a polymer, and are dielectric layers.
Abstract:
A method for forming a semiconductor structure. A semiconductor substrate including a plurality of dies mounted thereon is provided. The substrate includes a first portion proximate to the dies and a second portion distal to the dies. In some embodiments, the first portion may include front side metallization. The second portion of the substrate is thinned and a plurality of conductive through substrate vias (TSVs) is formed in the second portion of the substrate after the thinning operation. Prior to thinning, the second portion may not contain metallization. In one embodiment, the substrate may be a silicon interposer. Further back side metallization may be formed to electrically connect the TSVs to other packaging substrates or printed circuit boards.
Abstract:
A method includes forming a dielectric layer over a substrate, forming an interconnect structure over the dielectric layer, and bonding a die to the interconnect structure. The substrate is then removed, and the dielectric layer is patterned. Connectors are formed at a surface of the dielectric layer, wherein the connectors are electrically coupled to the die.
Abstract:
A package system includes a first integrated circuit disposed over an interposer. The interposer includes at least one molding compound layer including a plurality of electrical connection structures through the at least one molding compound layer. A first interconnect structure is disposed over a first surface of the at least one molding compound layer and electrically coupled with the plurality of electrical connection structures. The first integrated circuit is electrically coupled with the first interconnect structure.