Abstract:
The present invention provides a method of polishing and/or cleaning a substrate using a multi-component polishing and/or cleaning composition, wherein the components of the polishing and/or cleaning composition are mixed at the point-of-use or immediately before delivery to the point-of-use. The present invention also provides a method of polishing and/or cleaning more than one substrate simultaneously using a single apparatus, wherein a different polishing or cleaning composition is delivered to each substrate.
Abstract:
Methods and apparatus are provided for combining the manufacturing of a fixed-abrasive substrate and the chemical mechanical planarization of semiconductor wafers using a single process path (26). An electrostatic patterning device (58) produces an electrostatic charge of a predetermined pattern and density on a backing (52). An abrasive/binding agent container (60) deposits an abrasive/binding agent mixture on the surface of the backing (52). The mixture is attracted to the backing (52) in the pattern of the electrostatic charge. A vacuum force generator (62) removes the excess abrasive/binding agent mixture from the backing (52). An UV irradiation device (64) fixes the mixture to the backing (52). A conveyor (74) carries the fixed-abrasive substrate (54) to the CMP station (66).
Abstract:
The method comprises the steps of mounting a first wafer (13) on the mounting member (12) and securing the mounting member to the hub (16) by drawing a vacuum at a first vacuum pressure through the hub; rotating the hub about the hub axis (AH), rotating a polishing pad (34) mounted on the turntable (30) about the turntable axis (at), and bringing a surface of the wafer (13) and the polishing pad into contact with each other. The wafer (16) is demounted, and the shape of the polished wafer is determined. A second vacuum pressure is selected using the information obtained. A successive wafer is polished according to the same method as the first wafer except that the second vacuum pressure is substituted for the first vacuum pressure. The second vacuum pressure is sufficient to deform the mounting member (12) thereby deform the wafer to improve the flatness and parallelism of the surfaces of the successive wafer.
Abstract:
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.
Abstract:
A method and apparatus for conditioning a polishing pad is described. The method includes steps of moving a cylindrical roller (202) having an abrasive substance affixed to it against a moving polishing pad (46). The roller may be actively rotated or reciprocated at variable rates, while maintaining a pressure against the polishing pad. The apparatus includes a cylindrical roller attached to one or more pressure application devices mechanically connected to the roller.
Abstract:
The invention utilizes colloidal silica soot (62) in a semiconductor process for chemical-mechanical planarizing a semiconductor integrated circuit workpiece (24) with a slurry (60). The particulate abrasive agent colloidal solid sphere fused silica soot (62) provides a beneficial CMP slurry/process for semiconductor device manufacturing compared to standard semiconductor CMP slurries with conventional colloidal sol-gel or fumed silica.
Abstract:
A method of machining flat parts (2), includes the use of two permanent magnets (7, 8) which are located opposite to and spaced from one another so as to form a magnetic field with a magnetic flux extending perpendicular to the magnets, placing a flat part (2) in the magnetic field between the magnets so that the magnetic flux extends through the flat part (2), supplying a magnetic-abrasive powder (9) to the flat part (2) in the magnetic field, and performing a relative movement between at least one of the magnets (7, 8) and the flat part (2) so as to remove a material from a surface of the flat part (2).
Abstract:
A multi-step CMP system is used to polish a wafer to form metal interconnects in a dielectric layer upon which barrier and metal layers have been formed. A first polish removes an upper portion of the metal layer using a first slurry and a first set of polishing parameters, leaving residual metal within the dielectric layer to serve as the metal interconnects. A second polish of the wafer on the same platen and polishing pad removes portions of the barrier layer using a second slurry under a second set of polishing parameters. The second polish clears the barrier layer from the upper surface of the dielectric layer, thereby forming the metal interconnect. To reduce dishing and dielectric erosion, the second slurry is selected so that the barrier layer is removed at a faster rate than the residual metal within the dielectric layer. A cleaning step may be optionally performed between the first and second polishes. Further, the first polish may include a soft landing step to further reduce dishing and dielectric erosion. Alternatively, the first polish may be used to remove portions of the metal and barrier layers, leaving residual metal in the dielectric layer to serve as the metal interconnect. A second polish using a dielectric slurry is then performed to reduce microscratches.
Abstract:
A substrate (10) is chemical mechanical polished with a high-selectivity slurry until the stop layer (14) is at least partially exposed, and then the substrate (10) is polished with a low-selectivity slurry until the stop layer (14) is completely exposed.
Abstract:
The invention provides a process and system that utilizes conductivity measurements during mixing of chemical components to provide a slurry having a solids content within a qualification range. That is, by providing a reference conductivity value indicative of when a sufficient amount of at least two chemicals are combined and by monitoring conductivity while the chemicals are combined, the process and system of the present invention are able to provide a slurry having a solids content within a qualification range.