Abstract: A brush core and the method for making a brush core for use in substrate scrubbing are provided. The substrate can be any substrate that may need to undergo a scrubbing operation to complete a cleaning operation, etching operation, or other preparation. For instance, the substrate can be a semiconductor wafer, a disk, or any other type of work piece that will benefit from a brush core that can deliver uniform controlled amounts of fluid through the brush along an entire length of the brush core. The brush core is defined by a tubular core having a length that extends between a first end and a second end. The first end has an opening into a bore that is defined through a middle of the tubular core and extends along an inner length of the tubular core. A first plurality of holes are oriented along a plurality of first lines that extend in the direction of the length of the tubular core, and each of the first plurality of holes define paths to the bore of the tubular core.

Abstract: A brush core and the method for making a brush core for use in substrate scrubbing are provided. The substrate can be any substrate that may need to undergo a scrubbing operation to complete a cleaning operation, etching operation, or other preparation. For instance, the substrate can be a semiconductor wafer, a disk, or any other type of work piece that will benefit from a brush core that can deliver uniform controlled amounts of fluid through the brush along an entire length of the brush core. The brush core is defined by a tubular core having a length that extends between a first end and a second end. The first end has an opening into a bore that is defined through a middle of the tubular core and extends along an inner length of the tubular core. A first plurality of holes are oriented along a plurality of first lines that extend in the direction of the length of the tubular core, and each of the first plurality of holes define paths to the bore of the tubular core.

Abstract: A brush core and the method for making a brush core for use in substrate scrubbing are provided. The substrate can be any substrate that may need to undergo a scrubbing operation to complete a cleaning operation, etching operation, or other preparation. For instance, the substrate can be a semiconductor wafer, a disk, or any other type of work piece that will benefit from a brush core that can deliver uniform controlled amounts of fluid through the brush along an entire length of the brush core. The brush core is defined by a tubular core having a length that extends between a first end and a second end. The first end has an opening into a bore that is defined through a middle of the tubular core and extends along an inner length of the tubular core. A first plurality of holes are oriented along a plurality of first lines that extend in the direction of the length of the tubular core, and each of the first plurality of holes define paths to the bore of the tubular core.

Abstract: A chain saw attachment for a portable chain saw. The chain saw attachment comprises a cutter head journalled on the cutter axle and having four planing knives, two mounting arms removably securable to the chain saw bar, a chain sprocket engaging and being rotated by the saw chain, a driving sprocket rotated in response to rotation of the chain sprocket, a driven sprocket fixedly attached to the cutter head, and a planer chain engaged by the driving and driven sprockets so as to transmit power from the saw motor to the cutter head. The planing knives are arranged conventionally on the cutter head. The mounting arms the ends of the cutter axle so as to hold the cutter axle and cutter head perpendicularly to the saw bar. A planing guide is provided for use with the planer attachment.

Abstract: A chain saw attachment for mounting on a portable power-driven chain saw having a saw bar and an endless saw chain disposed for movement around the saw bar, the chain saw attachment consisting of: (a) a cutting head assembly including a first wheel having a central axial aperture and slots in the perimeter of the wheel for receiving four cutting knives; a second wheel having a central axial aperture and slots in the perimeter of the wheel for receiving four cutting knives; a drive sprocket positioned between the two wheels, the drive sprocket being adapted to receive and be driven by the chain; eight cutting knives, the cutting knives being individually positioned in the slots in the perimeters of the first and second wheels and held in the slots by set screws; and three bolts for holding closely together in a unitary assembly the first and second wheels and the drive sprocket; (b) an axle extending through the central axial apertures of the first and second wheels, the ends of the axle extending normally out