摘要:
A process for plasma etching of contact and via openings in low-k organic polymer dielectric layers is described which overcomes problems of sidewall bowing and hardmask pattern deterioration by etching the organic layer in a high density plasma etcher with a chlorine/inert gas plasma. By adding chlorine to the oxygen/inert gas plasma, the development of an angular aspect or faceting of the hardmask pattern edges by ion bombardment is abated. Essentially vertical sidewalls are obtained in the openings etched in the organic polymer layer while hardmask pattern integrity is maintained. The addition of a passivating agent such as nitrogen, BCl.sub.3, or CHF.sub.3 to the etchant gas mixture further improves the sidewall profile by reducing bowing through protective polymer formation.
摘要:
The invention relates to integrated circuit fabrication, and more particularly to a metal gate electrode. An exemplary structure for a semiconductor device comprises a substrate comprising a major surface; a first rectangular gate electrode on the major surface comprising a first layer of multi-layer material; a first dielectric material adjacent to one side of the first rectangular gate electrode; and a second dielectric material adjacent to the other 3 sides of the first rectangular gate electrode, wherein the first dielectric material and the second dielectric material collectively surround the first rectangular gate electrode.
摘要:
The invention relates to integrated circuit fabrication, and more particularly to a metal gate structure. An exemplary structure for a CMOS semiconductor device comprises a substrate comprising an isolation region surrounding and separating a P-active region and an N-active region; a P-metal gate electrode over the P-active region and extending over the isolation region, wherein the P-metal gate electrode comprises a P-work function metal and an oxygen-containing TiN layer between the P-work function metal and substrate; and an N-metal gate electrode over the N-active region and extending over the isolation region, wherein the N-metal gate electrode comprises an N-work function metal and a nitrogen-rich TiN layer between the N-work function metal and substrate, wherein the nitrogen-rich TiN layer connects to the oxygen-containing TiN layer over the isolation region.
摘要:
A single wafer etching apparatus and various methods implemented in the single wafer etching apparatus are disclosed. In an example, etching a silicon nitride layer in a single wafer etching apparatus includes: heating a phosphoric acid to a first temperature; heating a sulfuric acid to a second temperature; mixing the heated phosphoric acid and the heated sulfuric acid; heating the phosphoric acid/sulfuric acid mixture to a third temperature; and etching the silicon nitride layer with the heated phosphoric acid/sulfuric acid mixture.
摘要:
A method for fabricating a device is disclosed. An exemplary method includes providing a substrate and forming a plurality of fins over the substrate. The method further includes forming a first opening in the substrate in a first longitudinal direction. The method further includes forming a second opening in the substrate in a second longitudinal direction. The first and second longitudinal directions are different. The method further includes depositing a filling material in the first and second openings.
摘要:
The present disclosure involves a FinFET. The FinFET includes a fin structure formed over a substrate. A gate dielectric layer is least partially wrapped around a segment of the fin structure. The gate dielectric layer contains a high-k gate dielectric material. The FinFET includes a polysilicon layer conformally formed on the gate dielectric layer. The FinFET includes a metal gate electrode layer formed over the polysilicon layer. The present disclosure provides a method of fabricating a FinFET. The method includes providing a fin structure containing a semiconductor material. The method includes forming a gate dielectric layer over the fin structure, the gate dielectric layer being at least partially wrapped around the fin structure. The method includes forming a polysilicon layer over the gate dielectric layer, wherein the polysilicon layer is formed in a conformal manner. The method includes forming a dummy gate layer over the polysilicon layer.
摘要:
A method for preventing the formation of contaminating polymeric films on the backsides of semiconductor substrates includes providing an oxygen-impregnated focus ring and/or an oxygen-impregnated chuck that releases oxygen during etching operations. The method further provides delivering oxygen gas to the substrate by mixing oxygen in the cooling gas mixture, maintaining the focus ring at a temperature no greater than the substrate temperature during etching and cleaning the substrate using a two step plasma cleaning sequence that includes suspending the substrate above the chuck.
摘要:
An isolation trench having localized stressors is provided. In accordance with embodiments of the present invention, a trench is formed in a substrate and partially filled with a dielectric material. In an embodiment, the trench is filled with a dielectric layer and a planarization step is performed to planarize the surface with the surface of the substrate. The dielectric material is then recessed below the surface of the substrate. In the recessed portion of the trench, the dielectric material may remain along the sidewalls or the dielectric material may be removed along the sidewalls. A stress film, either tensile or compressive, may then be formed over the dielectric material within the recessed portion. The stress film may also extend over a transistor or other semiconductor structure.
摘要:
A method of processing multi-layer films, the method including: (1) processing a plurality of layers according to selected parameters, (2) determining a plurality of optical characteristics each associated with one of the plurality of layers and determined during the processing of the associated one of the plurality of layers, and (3) determining dynamic processing progressions each based on one of the plurality of optical characteristics that is associated with a particular one of the plurality of layers undergoing the processing.
摘要:
An intermediate structure from which a dual damascene structure may be fabricated includes a first-formed, unfaceted via hole and an intersecting trench both formed by gas plasma etching of a dielectric layer. The sidewall of the via hole is maintained unfaceted during and after trench formation by substantially filling it with a gas-plasma-etchable plug prior to trench formation. The presence of the plug in the via hole during gas plasma etching of the trench, also produces a trench bottom that is substantially flat.