摘要:
A new plasma etch back is provided that is applied to the surface of a low-k dielectric after the process of CMP of a copper surface has been completed. The copper surface is the surface of interconnect metal, the interconnect metal is embedded in the layer of low-k dielectric.
摘要:
A method of forming a SiCOH etch stop layer in a copper damascene process is described. A substrate with an exposed metal layer is treated with H2 or NH3 plasma to remove metal oxides. Trimethylsilane is flowed into a chamber with no RF power at about 350° C. to form at least a monolayer on the exposed metal layer. The SiCOH layer is formed by a PECVD process including trimethylsilane and CO2 source gases. Optionally, a composite SiCOH layer comprised of a low compressive stress layer on a high compressive stress layer is formed on the substrate. A conventional damascene sequence is then used to form a second metal layer on the exposed metal layer. Via Rc stability is improved and a lower leakage current is achieved with the trimethylsilane passivation layer. A composite SiCOH etch stop layer provides improved stress migration resistance compared to a single low stress SiCOH layer.
摘要:
A novel embedded fastener apparatus and method for fastening components to the interior of a process chamber of a semiconductor fabrication apparatus. In one embodiment, an apparatus having a showerhead or gas distribution plate which is mounted to the interior of the process chamber using multiple fasteners which are embedded in respective fastener openings in the showerhead. In another embodiment, an apparatus having a showerhead which is mounted to the interior of the process chamber using multiple exterior fasteners which extend into the showerhead through the walls of the process chamber. Accordingly, the regions of the showerhead which surround the fasteners are physically separated from the interior of the process chamber.
摘要:
A chemical mechanical polish (CMP) planarizing method for forming a chemical mechanical polish (CMP) planarized microelectronic layer within a microelectronic fabrication employs first a substrate. There is then formed over the substrate a microelectronic layer. There is then planarized, while employing a chemical mechanical polish (CMP) planarizing method, the microelectronic layer to form a chemical mechanical polish (CMP) planarized microelectronic layer. Within the method, the microelectronic layer when formed over the substrate is formed with a thickness variation which compensates for a chemical mechanical polish (CM) rate non-uniformity when forming while employing the chemical mechanical polish (CMP) planarizing method the chemical mechanical polish (CMP) planarized microelectronic layer from the microelectronic layer.
摘要:
A SiOC layer and/or a SiC layer of an etch stop layer may be improved by altering the process used to form them. In a bi-layer structure, a SiOC layer and/or a SiC layer may be improved to provide better reliability. A silicon carbide (SiC) layer may be used to form a single-layer etch stop layer, while also acting as a glue layer to improve interface adhesion. Preferably, the SiC layer is formed in a reaction chamber having a flow of substantially pure trimetholsilane (3MS) streamed into and through the reaction chamber under a pressure of less than about 2 torr therein. Preferably, the reaction chamber is energized with high frequency RF power of about 100 watts or more. Preferably, the SiOC layer is formed in a reaction chamber having a flow of 3MS and CO2, and is energized with low frequency RF power of about 100 watts or more.
摘要:
A method of forming a SiCOH etch stop layer in a copper damascene process is described. A substrate with an exposed metal layer is treated with H2 or NH3 plasma to remove metal oxides. Trimethylsilane is flowed into a chamber with no RF power at about 350° C. to form at least a monolayer on the exposed metal layer. The SiCOH layer is formed by a PECVD process including trimethylsilane and CO2 source gases. Optionally, a composite SiCOH layer comprised of a low compressive stress layer on a high compressive stress layer is formed on the substrate. A conventional damascene sequence is then used to form a second metal layer on the exposed metal layer. Via Rc stability is improved and a lower leakage current is achieved with the trimethylsilane passivation layer. A composite SiCOH etch stop layer provides improved stress migration resistance compared to a single low stress SiCOH layer.
摘要:
A test region layout for testing shallow trench isolation gap fill characteristics is disclosed. Each test region further comprises at least one test pattern disposed in an interior portion of the test region. In a preferred embodiment, the test pattern is a square shape or, more preferably, two diametrically opposed “L” shapes which are discontinuous with respect to each other. It is emphasized that this abstract is provided to comply with the rules requiring an abstract which will allow a searcher or other reader to quickly ascertain the subject matter of the technical disclosure. It is submitted with the understanding that it will not be used to interpret or limit the scope or meaning of the claims.
摘要:
A method to reduce via poisoning in low-k copper dual damascene interconnects through ultraviolet (UV) irradiation of the damascene structure is disclosed. This is accomplished by irradiating the insulative layers each time the layers are etched to form a portion of the damascene structure. Thus, irradiation is performed once after the forming of a trench or a via, and again for the second time when the insulative layers are etched to form the remaining trench or via. The trench and hole openings of the dual damascene structure are exposed to UV light in a dry ozone environment, which then favorably alters the surface characteristics of the low-k dielectric walls which are normally hydrophobic. Hence, during etching, moisture is not absorbed into the walls. Furthermore, it is found that the UV treatment inhibits reaction between the walls and the photoresist used during the forming of the damascene structure, thereby providing clean openings without any photoresist residue, and hence, much less poisoned contacts/vias. Consequently, as copper is deposited into the clean damascene, voids are avoided, and a Cu dual damascene interconnect with low RC delay characteristics is obtained.
摘要:
A method for forming a dual damascene conductor interconnection layer within an inter-level metal dielectric (IMD) layer formed upon a substrate employed within a microelectronics fabrication. There is provided a substrate employed within a microelectronics fabrication. There is then formed over the substrate a series of conductor lines. There is then formed over the substrate a dielectric layer. There is then formed over the dielectric layer an intermediate second dielectric layer. There is then formed over the substrate a patterned photoresist etch mask layer. There is then etched the pattern of the photoresist etch mask-layer into and through the dielectric layers, followed by stripping the photoresist layer. There is then treated the exposed dielectric layer surface to a reactive gas to form a reacted surface layer. There may then be formed over the substrate additional patterned photoresist etch mask layers, with attenuated degradation of the dielectric layers due to the organic materials and methods for cleaning and stripping same.
摘要:
A method for forming a dielectric layer upon a substrate within a microelectronics fabrication. There is provided a substrate. There is then formed upon the substrate while employing a low dielectric constant spin-on material a dielectric layer which is subsequently cured at atmospheric pressure at an elevated temperature to stabilize the physical and chemical properties of the low dielectric constant dielectric layer so as to attenuate shrinkage and other changes in those physical, and chemical properties from thermal annealing at sub-atmospheric pressure due to typical further microelectronics fabrication processing steps.