摘要:
A structure comprising a layer of copper, a barrier layer, a layer of AlCu, and a pad-limiting layer, wherein the layer of AlCu and barrier layer are interposed between the layer of copper and pad-limiting layer.
摘要:
A multi-level, coplanar copper damascene interconnect structure on an integrated circuit chip includes a first planar interconnect layer on an integrated circuit substrate and having plural line conductors separated by a dielectric material having a relatively low dielectric constant and a relatively low elastic modulus. A second planar interconnect layer on the first planar interconnect layer comprises a dielectric film having an elastic modulus higher than in the first planar interconnect layer and conductive vias therethrough. The vias are selectively in contact with the line conductors. A third planar interconnect layer on the second planar interconnect layer has plural line conductors separated by the dielectric material and selectively in contact with the vias.
摘要:
A carrier structure and method for fabricating a carrier structure with through-vias each having a conductive structure with an effective coefficient of thermal expansion which is less than or closely matched to that of the substrate, and having an effective elastic modulus value which is less than or closely matches that of the substrate. The conductive structure may include concentric via fill areas having differing materials disposed concentrically therein, a core of the substrate material surrounded by an annular ring of conductive material, a core of CTE-matched non-conductive material surrounded by an annular ring of conductive material, a conductive via having an inner void with low CTE, or a full fill of a conductive composite material such as a metal-ceramic paste which has been sintered or fused.
摘要:
A method for forming a quaternary alloy film of Co—W—P—Au for use as a diffusion barrier layer on a copper interconnect in a semiconductor structure and devices formed incorporating such film are disclosed. In the method, a substrate that has copper conductive regions on top is first pre-treated by two separate pre-treatment steps. In the first step, the substrate is immersed in a H2SO4 rinsing solution and next in a solution containing palladium ions for a length of time sufficient for the ions to deposit on the surface of the copper conductive regions. The substrate is then immersed in a solution that contains at least 15 gr/l sodium citrate or EDTA for removing excess palladium ions from the surface of the copper conductive regions. After the pre-treated substrate is rinsed in a first rinsing step by distilled water, the substrate is electroless plated a Co—W—P film on the surfaces of the copper conductive regions in a first plating solution that contains cobalt ions, tungstate ions, citrate ions and a reducing agent. After the substrate coated with the Co—W—P film is rinsed in a second rinsing step by distilled water, the substrate is immersed in a second electroless plating solution for depositing a Au layer on top of the Co—W—P film. The present invention novel quaternary alloy film can be used as an effective diffusion barrier layer between a copper interconnect and silicon substrate or SiO2 dielectric layers.
摘要:
The present invention discloses an interconnection structure for providing electrical communication with an electronic device which includes a body that is formed substantially of copper and a seed layer of either a copper alloy or a metal that does not contain copper sandwiched between the copper conductor body and the electronic device for improving the electromigration resistance, the adhesion property and other surface properties of the interconnection structure. The present invention also discloses methods for forming an interconnection structure for providing electrical connections to an electronic device by first depositing a seed layer of copper alloy or other metal that does not contain copper on an electronic device, and then forming a copper conductor body on the seed layer intimately bonding to the layer such that electromigration resistance, adhesion and other surface properties of the interconnection structure are improved.
摘要:
An interconnect structure and barrier layer for electrical interconnections is described incorporating a layer of TaN in the hexagonal phase between a first material such as Cu and a second material such as Al, W, and PbSn. A multilayer of TaN in the hexagonal phase and Ta in the alpha phase is also described as a barrier layer. The invention overcomes the problem of Cu diffusion into materials desired to be isolated during temperature anneal at 500° C.
摘要:
High quality factor (Q) spiral and toroidal inductor and transformer are disclosed that are compatible with silicon very large scale integration (VLSI) processing, consume a small IC area, and operate at high frequencies. The spiral inductor has a spiral metal coil deposited in a trench formed in a dielectric layer over a substrate. The metal coil is enclosed in ferromagnetic liner and cap layers, and is connected to an underpass contact through a metal filled via in the dielectric layer. The spiral inductor also includes ferromagnetic cores lines surrounded by the metal spiral coil. A spiral transformer is formed by vertically stacking two spiral inductors, or placing them side-by-side over a ferromagnetic bridge formed below the metal coils and cores lines. The toroidal inductor includes a toroidal metal coil with a core having ferromagnetic strips. The toroidal metal coil is segmented into two coils each having a pair of ports to form a toroidal transformer.
摘要:
A method and apparatus for activating fusible links on a circuit substrate. The circuit substrate is supported in a fixture which is cooled to a below ambient temperature. Cooling of the circuit substrate decreases the absorption of energy by the substrate, permitting a smaller spot size laser beam having a lower wavelength to be employed for interrupting the fusible links. The substrate is cooled by a refrigeration coil in heat transfer with the fixture holding the substrate. Moisture formation is avoided by placing the substrate and laser source in a controlled atmosphere.
摘要:
An interconnect structure having reduced fringing fields of bottom corners of said interconnect structure and a method of fabricating the same is provided. The interconnect structure includes one or more interconnect levels one on top of each other, wherein each interconnect level is separated by a diffusion barrier and includes a dielectric stack of at least one low-k interlayer dielectric on at least one hybrid dielectric, said dielectrics having planar interfaces therebetween, each interconnect level further comprising metallic lines formed in said low-k interlayer dielectric, with the proviso that bottom horizontal portions of said metallic lines are not coincident with said interface, and said metallic lines are contained within said low-k interlayer dielectric. The interconnect structures may be fabricated such that top horizontal portions of the metallic lines are coplanar with a top surface of the low-k interlayer dielectric.
摘要:
The present invention relates to semiconductor devices comprising as one of their structural components diamond-like carbon as an insulator for spacing apart one or more levels of a conductor on an integrated circuit chip. The present invention also relates to a method for forming an integrated structure and to the integrated structure produced therefrom. The present invention further provides a method for selectively ion etching a diamond-like carbon layer from a substrate containing such a layer.