摘要:
An interconnect structure of a semiconductor device designed for reduced intralevel and interlevel capacitance, and includes a lower metal layer and an upper metal layer and an insulating layer interposed between metal layers. Each of the lower metal layer and upper metal layer include a plurality of conductive lines spaced apart and extending within a low-k dielectric material. A plurality of metal-filled vias interconnects the conductive lines of the lower metal layer to the conductive lines of the upper metal layer. The insulating layer comprises also comprises a low-k dielectric material disposed between the adjacent metal-filled vias. Openings, having been etched in the low-k dielectric material between the conductive lines of the upper and lower metal layers, and the metal-filled vias, an ultra-low k material is deposited within the openings. The integration of the ultra-low k and low-d dielectric materials reduces the overall capacitance of the structure to enhance performance.
摘要:
An inductor formed within an integrated circuit and a method for forming the inductor. The inductor comprises an underlying layer of aluminum formed in a first metallization layer and patterned and etched into the desired shape. In one embodiment the aluminum line comprises a spiral shape. According to a damascene process, a conductive runner, preferably of copper, is formed in a dielectric layer overlying the aluminum line and in electrical contact therewith. The aluminum line and the conductive runner cooperate to form the inductor. In another embodiment the aluminum line and the conductive runner are formed in a vertically spaced-apart orientation, with tungsten plugs or conductive vias formed to provide electrical connection therebetween. A method for forming the inductor comprises forming an aluminum conductive line and forming a conductive runner over the conductive line.
摘要:
A method for dry etching a material deposited on semiconductor device is performed by chemically reacting the material with an etchant gas. The etching process is conducted in a reaction chamber at a predetermined temperature and predetermined pressure within the reaction chamber and without the need of generating a plasma within the chamber or applying an electrical bias to the semiconductor device. A sufficient amount of gas is introduced into the reaction chamber to selectively remove the material from the semiconductor device.
摘要:
A system and method for eliminating interconnect extrusions in vias that are formed during ionized metal plasma processing. By eliminating interconnect extrusions in vias, reliability failures and yield loss are decreased. The extrusions of interconnect metallization occur while wafers are subject to elevated temperatures that cause the internal stresses in the interconnect metallization to transit from a substantially tensile mode to a substantially compressive mode. By controlling the interconnect temperature to be below the temperature at which the interconnect transits from a tensile to a compressive mode, interconnect extrusions in vias are eliminated. The interconnect temperature is controlled by using an actively cooled pedestal in combination with a low temperature IMP deposition process. In addition, the IMP processing time may also be decreased to limit heating of the interconnect.
摘要:
The present invention provides a chemical mechanical planarization (CMP) polishing composition that polishes metal layers at a good removal rate and that provides good planarization of metal layers in a process that can be readily controlled. The CMP polishing composition of the present composition includes a plurality of abrasive particles, a triazole or a triazole derivative, a ferricyanide salt oxidizing agent and water and has a pH of from about 1 to about 6. In addition, the present invention includes a method for removing at least a portion of a metallization layer by polishing a metallization layer using the CMP polishing composition of the invention.
摘要:
A method for making an oxide layer on a silicon substrate produces an oxide layer including graded portions with greatly reduced stress. The method includes growing a first oxide portion over a substrate by upwardly ramping the substrate to a first temperature lower than a SiO2 viscoelastic temperature. Thereafter a second oxide portion is grown between the first oxide portion and the silicon substrate by exposing the silicon substrate to an oxidizing ambient at a second temperature higher than the SiO2 viscoelastic temperature. The second oxide portion may have a thickness in a range of about 25 to 50% of a total thickness of the graded oxide layer.
摘要:
A method for treating an effluent gas from a semiconductor processing system includes the steps of exhausting the effluent gas from a processing chamber, and catalytically treating the effluent gas with the at least one mixed metal oxide. The effluent gas includes unconsumed process gasses introduced during semiconductor processing operations, such as during chemical vapor deposition (CVD) and plasma-reactive ion etching. The mixed metal oxide may include a hetero bi-metal oxide, a hetero tri-metal oxide, or a perovskite. A hetero bi-metal oxide includes LaCoO3 and LaMnO3, for example, and a hetero tri-metal oxide includes (LaxPr1−x)CoO3 and (LaxPr1−x)MnO3, for example. The effluent gas may include at least carbon monoxide and/or ozone. Thus, catalytically treating the effluent gas preferably includes the catalytically converting carbon monoxide to carbon dioxide and/or ozone to oxygen. With the effluent gas being treated by the catalytic converter prior to being released into the atmosphere, undesirable gases, such as carbon monoxide and unreacted ozone are efficiently converted into non-harmful carbon dioxide and oxygen.
摘要:
A chemical mechanical polishing (CMP) system includes a polishing device including a polishing article. The polishing device holds the semiconductor wafer and provides relative movement between the semiconductor wafer and the polishing article with a slurry therebetween. The CMP system also includes a slurry processor for processing used slurry from the polishing device and for delivering processed slurry to the polishing device. The slurry processor including a metal separator for separating metal particles, polished from the semiconductor wafer, from the used slurry. The slurry can be continuously recirculated during a CMP process without damaging and/or contaminating the layers of the semiconductor wafer.
摘要:
A titanium nitride barrier within an integrated contact structure is formed as multi-layered stack. The multi-layering of the titanium nitride thus provides improved junction integrity since the multi-layer structure exhibits improved mechanical stability when compared to conventional single layer arrangements. The multi-layer titanium nitride barrier may be used as either a conventional interconnect metallization or as a nucleation structure within a tungsten plug. The multi-layer structure may be formed to include an overall thickness less than a conventional single layer, yet provide for improved stress accommodation, resulting in eliminating micro-cracks within the titanium nitride (and as a result eliminating the un-wanted diffusion of aluminum or tungsten precursors through the titanium nitride).
摘要:
Interconnects in porous dielectric materials are coated with a SiC-containing material to inhibit moisture penetration and retention within the dielectric material. Specifically, SiC coatings doped with boron such as SiC(BN) show particularly good results as barrier layers for dielectric interconnects.