摘要:
Polishing compositions and methods for removing conductive materials from a substrate surface are provided. In one aspect, a composition includes an acid based electrolyte system, one or more chelating agents, one or more corrosion inhibitors, one or more inorganic or organic acid salts, one or more pH adjusting agents to provide a pH between about 2 and about 10, a polishing enhancing material selected from the group of abrasive particles, one or more oxidizers, and combinations thereof, and a solvent. The composition may be used in an conductive material removal process including disposing a substrate having a conductive material layer formed thereon in a process apparatus comprising an electrode, providing the composition between the electrode and substrate, applying a bias between the electrode and the substrate, and removing conductive material from the conductive material layer. The ECMP polishing compositions and methods described herein improve the effective removal rate of materials from the substrate surface, such as copper, with a reduction in planarization type defects and yielding a desirable surface finish.
摘要:
Embodiments of a polishing article for processing a substrate are provided. In one embodiment, a polishing article for processing a substrate comprises a fabric layer having a conductive layer disposed thereover. The conductive layer has an exposed surface adapted to polish a substrate. The fabric layer may be woven or non-woven. The conductive layer may be comprised of a soft metal and, in one embodiment, the exposed surface may be planar.
摘要:
Embodiments of the invention generally provide a method and apparatus for processing a substrate in an electrochemical mechanical planarizing system. In one embodiment, a cell for polishing a substrate includes a processing pad disposed on a top surface of a platen assembly. A plurality of conductive elements are arranged in a spaced-apart relation across the upper planarizing surface and adapted to bias the substrate relative to an electrode disposed between the pad and the platen assembly. A plurality of passages are formed through the platen assembly between the top surface and a plenum defined within the platen assembly. In another embodiment, a system is provided having a bulk processing cell and a residual processing cell. The residual processing cell includes a biased conductive planarizing surface. In further embodiments, the conductive element is protected from attack by process chemistries.
摘要:
Embodiments of the invention generally provide a method and apparatus for processing a substrate in an electrochemical mechanical planarizing system. In one embodiment, a cell for polishing a substrate includes a processing pad disposed on a top surface of a platen assembly. A plurality of conductive elements are arranged in a spaced-apart relation across the upper planarizing surface and adapted to bias the substrate relative to an electrode disposed between the pad and the platen assembly. A plurality of passages are formed through the platen assembly between the top surface and a plenum defined within the platen assembly. In another embodiment, a system is provided having a bulk processing cell and a residual processing cell. The residual processing cell includes a biased conductive planarizing surface. In further embodiments, the conductive element is protected from attack by process chemistries.
摘要:
Embodiments of a polishing article for polishing a substrate are provided. In one embodiment, the polishing article includes an annular upper layer made of a dielectric material coupled to an annular lower layer made of a conductive material, and an annular subpad sandwiched between the annular upper layer and the annular lower layer forming a replaceable assembly therewith.
摘要:
Embodiments of a polishing article for polishing a substrate are provided. In one embodiment, the polishing article includes a ring-shaped upper layer having a polishing surface, and a conductive layer coupled to the upper layer and forming a replaceable assembly therewith.
摘要:
Method for process control of electro-processes is provided. In one embodiment, the method includes processing a conductive layer formed on a wafer using a target endpoint, detecting breakthrough of the conductive layer to expose portions of an underlying layer, and adjusting the target endpoint in response to the detected breakthrough. In another embodiment, the target endpoint is adjusted relative to an amount of underlying layer exposed through the conductive layer.
摘要:
Systems and methods for detecting the endpoint of a polishing step. In general, an electropolishing system is provided with a power supply configured to deliver a current through an electrolytic solution. Signal characteristics of the signal provided by the power supply are monitored to determine a polishing endpoint. Illustratively, the monitored signal characteristics include current and voltage.
摘要:
A method and apparatus are provided for polishing a substrate surface. In one aspect, an apparatus for polishing a substrate includes a basin and a polishing head. A carrier is disposed in the basin and has a substrate supporting surface. A retaining ring is disposed on the carrier and at least partially circumscribes the substrate supporting surface. The polishing head is supported above the basin and includes a conductive polishing pad. Embodiments may further include a vent to allow gas to escape through the polishing head. Embodiments may further include an electrolyte supply that flows electrolyte into the polishing head and out through a permeable electrode and the conductive pad to the substrate. Embodiments may also be configured with a polishing head diameter smaller than the substrate supported by the carrier.
摘要:
Method for process control of electro-processes is provided. In one embodiment, the method includes processing a conductive layer formed on a wafer using a target endpoint, detecting breakthrough of the conductive layer to expose portions of an underlying layer, and adjusting the target endpoint in response to the detected breakthrough. In another embodiment, the target endpoint is adjusted relative to an amount of underlying layer exposed through the conductive layer.