Abstract: An abrasive member and a cleaning device for a probe needle of a probe card are obtained which are capable of simplifying an operation of cleaning a probe needle of a probe card and also eliminating the step of employing an organic solvent or the like in the probe needle cleaning operation to improve the operating environment. In the cleaning device for a probe needle of a probe card, an abrasive member for a probe needle includes first and second fiber materials formed of at least one selected from the group consisting of a metal fiber, a carbon fiber and a ceramic fiber. The first and second fiber materials extend in different directions and are fixed to each other at a region thereof. A surface of abrasive member is provided with a space having approximately the same width as the width of the tip of a probe needle.

Abstract: A material adapted for the preparation of a working tool contains long fiberglass arranged in the form of an entwined yarn and at least one thermosettable resin containing abrasive grains dispersed therein, which impregnates the entwined fiberglass yarn. Upon shaping and curing, a working tool is readily formed from this material in the form of any of a rotor, a stick or other desired shape.

Abstract: A polymeric foam finishing pad is made by attaching a dense array of individual foam members to a suitable support substrate. The foam members are individually inserted into a support substrate and attached to the substrate by an adhesive layer. When making the foam pad, each of the foam members is preferably folded and inserted into a preformed opening contained in the support substrate, such that each foam member forms a pair of fingers that extend from the front face of the support substrate. The outer tip of each foam finger may include a pair of slits extending into the foam member from the outer tip.

Abstract: A low-density abrasive article comprising a nonwoven web and a multiplicity of abrasive particles which are bonded to the nonwoven web by means of an adherent binder. Abrasive particles useful in the present invention have particle sizes between about grade 4 to grade 36 and are made of an abrasive mineral having a Mohs hardness of less than about 8. The abrasive particles are preferably made of synthetically manufactured fused mullite. The low density abrasive article is particularly suitable for removing stock from a carbon steel workpiece.

Abstract: An automotive aluminum wheel abrading/polishing tool is disclosed. The abrading/polishing tool includes a substantially circular, resilient, central layer of non-woven material. A first plurality of individual, circumferentially offset, layers or strips of scored sandpaper or other coated abrasive material are secured to a first side of the non-woven material. A second plurality of individual, circumferentially offset, layers or strips of scored sandpaper or other coated abrasive material are secured to a second side of the non-woven material. The strips of abrasive material function in the removal of burrs or excess aluminum, and the non-woven material produces a uniform finish by polishing a work piece surface. The strips of abrasive material and the non-woven material cooperate to define an axially resilient circumferential end edge which effectively abrades and polishes highly contoured workpiece surfaces.

Abstract: A polishing pad for use in chemical-mechanical planarization (CMP) of semiconductor wafers includes a multiplicity of elongated microcolumns embedded in a matrix material body. The elongated microcolumns are oriented parallel to each other and extend from a planarizing surface used to planarize the semiconductor wafers. The elongated microcolumns are uniformly distributed throughout the polishing pad in order to impart uniform properties throughout the polishing pad. The polishing pad can also include elongated pores either coaxial width or interspersed between the elongated microcolumns to provide uniform porosity throughout the polishing pad.

Abstract: The fibrous scrubbing pad is proposed for use in wet orbital power scuffing of a damaged portion of a painted surface for enhancing paint color blending and adhesion during repair. It is particularly suited for use in auto collision repair. The pad most preferably incorporates three layers, a top layer comprising a sheet of loops mechanically engaged by a hooked surface of a power device disc pad used for driving the fibrous scrubbing pad, and a wet acid based scuffing medium impermeable layer of material engaging the sheet of loops to one surface of a fibrous pad layer used to scrub a wet acid based scuffing medium against the painted surface, to cause scuffing thereof.

Abstract: The invention relates to an apparatus for polishing wafers in the fabrication of semiconductor integrated circuits. The apparatus has a turntable on which a polishing pad of polyurethane foam is placed. The pad has a multiplicity of cavities in the polishing surface. In periodically dressing the pad, abrasive grains of diamond fall off the dressing tool, and some of the fallen abrasive grains remain in the cavities in the pad surface even though the pad surface is washed by water. According to the invention the polishing apparatus includes a cleaning device to drive abrasive grains out of the cavities. The cleaning device has a cylindrical body which rotates above the polishing pad. In an embodiment the cleaning device is a rotary brush having a multiplicity of needle-like parts of a synthetic resin on the cylindrical outer surface. The needle-like parts intrude into the cavities in the pad surface and flip abrasive grains out of the cavities.

Abstract: Abrasive articles and methods for their manufacture are described. The articles are screen abrasive articles including a durable backing member having a patterned array of portions thereon arranged around a plurality of openings extending through the backing with the openings comprising between about 20% and about 80% of the total area of the backing. A coating of abrasive material is adhesively affixed to the array of portions on the backing, forming abrasive surfaces arranged around the openings to cooperatively function as a single abrasive surface while the openings allow debris to pass through the article during abrasive applications. In at least one aspect of the invention, the portions of the backing include a plurality of first surface portions and a plurality of second surface portions having surface areas greater than the surface areas of the first portions.

Abstract: Lofty, low density nonwoven pads and a process for the manufacture of such pads are described. The pads of the invention each comprise a bundle of discontinuous fibers bonded to one another at their mutual points of contact. The fibers are arranged within the bundle to provide a dense longitudinal central portion extending to opposite ends of the bundle, less dense side portions, a longitudinal tensile strength and a transverse tensile strength, wherein the longitudinal tensile strength is greater than the transverse tensile strength. The pads are made according to a process comprising forming a tow of discontinuous fibers so that the fibers are arranged within the tow to extend along a first axis, twisting the tow along the first axis to form a slubbed tow, bonding the fibers to one another at their mutual contact points and cutting the slubbed tow into scouring pads and the like.

Abstract: A coated abrasive backing consisting of an endless, seamless, loop is provided. The backing loop includes about 40-99% by weight of an organic polymeric binder, based upon the weight of the backing; and an effective amount of a fibrous reinforcing material engulfed within the organic polymeric binder material. The endless, seamless backing loop includes a length with parallel side edges, and at least one layer of fibrous reinforcing material engulfed within the organic polymeric binder material such that there are regions of organic binder material free of fibrous reinforcing material on opposite surfaces of the layer of fibrous reinforcing material. The fibrous reinforcing material can be in the form of individual fibrous strands, a fibrous mat structure, or a combination of the these. A method for preparing the endless, seamless backing loop for a coated abrasive belt is also provided.

Abstract: A process for forming a twisted stem tool uses a specially designed clamping jaw fixture at the nose or bight portion of a half-round wire or cotter pin which helps to reduce the required clamping force and distribute that force over the entire wire-fill material interface. The jaws of the clamping fixture engage the outside of the nose over a substantial area, and in some forms actually bite into the wire or pin. After the twisting operation, the stem is placed in a swaging or coining press, and the stem beyond the fill material is reformed into a three or six-sided drive stem. The cold flow of the metal to form the flat sides locks the twisted half round wire or pin sections together so that the stem will resist unwinding if the tool is driven in a reverse direction. The coining of the stem providing flats provides a tighter confinement of the bundle of fill material at the stem, and enables a common three or six jaw Jacob's style chuck, for example, to obtain a more secure grip.

Abstract: A coated abrasive backing consisting of an endless, seamless, loop is provided. The backing loop includes about 40-99% by weight of an organic polymeric binder, based upon the weight of the backing; and an effective amount of a fibrous reinforcing material engulfed within the organic polymeric binder material. The endless, seamless backing loop includes a length with parallel side edges, and at least one layer of fibrous reinforcing material engulfed within the organic polymeric binder material such that there are regions of organic binder material free of fibrous reinforcing material on opposite surfaces of the layer of fibrous reinforcing material. The fibrous reinforcing material can be in the form of individual fibrous strands, a fibrous mat structure, or a combination of the these. A method for preparing the endless, seamless backing loop for a coated abrasive belt is also provided.

Abstract: A composite polyester/viscose spun yarn comprising polyester fibers and viscose fibers, fabrics comprising the polyester/viscose spun yarns, and a method of making the same are taught. The fabric is useful as a backing for coated abrasive articles.