摘要:
A method for forming a copper interconnect on an integrated circuit (IC) begins by forming a dielectric layer (20) having an opening. A tantalum-based barrier layer (21), such as TaN or TaSiN, is formed within the opening in the layer (20). A copper layer (22) is formed over the barrier layer (21). A first CMP process is used to polish the copper (22) to expose portions of the barrier (21). A second CMP process which is different from the first CMP process is then used to polish exposed portions of the layer (21) faster than the dielectric layer (20) or the copper layer (22). After this two-step CMP process, a copper interconnect having a tantalum-based barrier is formed across the integrated circuit substrate (12).
摘要:
A method of chemical mechanical planarization of a semiconductor device provides a semiconductor device having a device front surface and a device back surface with the device front surface being a top surface of a second metal layer. A first planarizing step planarizes the device front surface with a first medium to expose a device second front surface, where the first medium comprises a first abrasive component and a first chemical solution. A rinsing step then rinses the device back surface with water. A second planarizing step then planarizes the device second front surface with a second medium where the second medium comprises a second abrasive component and a second chemical solution.
摘要:
A method for polishing a metal layer (20) containing a combination of wide features (12), low density features (14), and high density features (18), is illustrated. A hydrophilic polish pad (24) having a shore D hardness of greater than 50 is used along with slurry (22) containing silica and an acidic based oxidizer such as oxadic acid in a chemical mechanical polishing (CMP) process. The result is less than 5:1 and preferably 1:1. This low selectivity results in the metal layer (20) being polished to a level below the surface of the surrounding oxide in a timed-controlled polish.
摘要:
A method of CMP of the semiconductor device where the method comprises the sequential steps of providing a semiconductor device, forming a copper layer on the semiconductor device and planarizing the copper layer with a medium. The medium comprises an abrasive component and a chemical solution. The chemical solution comprises water, an oxidizing agent, a first coordinating ligand adapted to form a complex with Cu(I) and a second coordinating ligand adapted to form a complex with Cu(II).
摘要:
A method and apparatus is disclosed for reclaiming a metal from the effluent of a chemical mechanical planarization (CMP) process and using the reclaimed metal in an electroplating process. The steps of the method include using a chemical solution in a CMP process to remove material from a semiconductor device. An effluent is produced by this step that contains a dissolved first species removed from the semiconductor device. Then a second step of treating the effluent is performed to remove the dissolved first species and to produce a reclaimed metal. Then a third step of using the metal in an electroplating process is performed.
摘要:
Methods and structures. A planarization method includes: providing a contact structure, where the contact structure includes an axle configured to rotate about an axis of rotation, a plurality of cantilever arms, each arm having a first end connected to the axle, where each arm extends radially outward from the axle; and a plurality of electrically conductive spheres, where at least one sphere is disposed on a second end of each arm; placing a substrate in contact with the spheres, applying an electric voltage to the axle, where the voltage transfers to the substrate, where responsive to the transfer an electrochemical reaction occurs on the substrate; rotating the axle, wherein the spheres revolve about the axis, wherein at least one sphere remains in electrical contact with the substrate; and electrochemical-mechanically planarizing the substrate. Also included is a contact structure, an electrical contact, and an electrical contact method.
摘要:
A method and apparatus is disclosed for rejuvenating a chemical solution used in a first chemical mechanical planarization (CMP) process for reuse in a second CMP process. The steps of the method include using the chemical solution in the first process to remove material from a semiconductor device. An effluent is produced by this step that contains a dissolved first species removed from the semiconductor device. Then a second step of treating the effluent is performed to remove the dissolved first species to produce a rejuvenated chemical solution.
摘要:
A method, process and system for the recycling of electrochemical-mechanical planarization slurries/electrolytes as they are used in the back end of line of the semiconductor wafer manufacturing process is disclosed. The method, process and system includes with the removal of metal ions from slurries using ion exchange media and/or electrochemical deposition.
摘要:
An electrical contact method. An axle having an axis of rotation is provided. Cantilever arms are provided. Each cantilever arm has a first end and a second opposing end. The first end is connected to the axle. Each cantilever arm extends radially outward from the axle about perpendicular to the axis of rotation. At least two electrically conductive contacts is provided. At least one electrically conductive contact of the at least two electrically conductive contacts is disposed on the second end of each cantilever arm. A sample is supported on a support member. The electrically conductive contacts are pressed against a first surface of the sample. After the electrically conductive contacts are pressed, the electrically conductive contacts are revolved about the axis of rotation, wherein the at least one electrically conductive contact remains in electrical contact with the first surface.
摘要:
Methods and structures. A planarization method includes: providing a contact structure, where the contact structure includes an axle configured to rotate about an axis of rotation, a plurality of cantilever arms, each arm having a first end connected to the axle, where each arm extends radially outward from the axle; and a plurality of electrically conductive spheres, where at least one sphere is disposed on a second end of each arm; placing a substrate in contact with the spheres, applying an electric voltage to the axle, where the voltage transfers to the substrate, where responsive to the transfer an electrochemical reaction occurs on the substrate; rotating the axle, wherein the spheres revolve about the axis, wherein at least one sphere remains in electrical contact with the substrate; and electrochemical-mechanically planarizing the substrate. Also included is a contact structure, an electrical contact, and an electrical contact method.