Abstract: A fixed abrasive grain wire saw that can improve precision of a cut plane of a workpiece and grinding efficiency and can prolong product life, a method of manufacturing the fixed abrasive grain wire saw, and a method of machining a workpiece by the fixed abrasive grain wire-saw. To fasten abrasive grains to an outer circumferential surface of a metal core wire, a plurality of transfer rollers, in each of which many tiny holes filled with an adhesive are formed, are used to transfer the adhesive to the outer circumferential surface of the core wire to form, on the outer circumferential surface, a plurality of rows of punctiform adhesive layers that are linearly arrayed in the axial direction at regular intervals. The abrasive grains are tentatively fastened to the adhesive layers, after which the abrasive grains are permanently fastened with a metal plated layer formed by electrolytic deposition.

Abstract: To provide a dresser for a polishing cloth in which a stable dressing performance is maintained, a uniformly polished surface is provided on the surface of the polishing cloth, and in particular, a scratch on a wafer caused by the dissociation of abrasive grains is prevented, and a method for producing the same A dresser for a polishing cloth includes a base 1 and a dressing part disposed on the surface of the base. The dressing part includes a plurality of abrasive grains 2 and a plate-shaped holding component 3 that holds the abrasive grains 2. The holding component 3 is composed of cemented carbide, cermet, or ceramic. Alternatively, the holding component 3 may be composed of a material containing silicon to which silicon dioxide is added.

Abstract: An abrasive cloth dresser is provided which is capable of adjusting the state of its dressing face so as to give an abrasive cloth a uniform polishing surface, and capable of giving the surfaces of an abrasive cloth a suitable polishing capability according to polishing objects, even if the dressing face state exhibits individual differences in, for example, the end shapes of abrasive grains. The abrasive cloth dresser 1 includes a base metal 2 having a ring-shaped dressing face 4 in the outer region of the base metal 2. First abrasive grain units 5 and second abrasive grain units 6 formed of abrasive grains with different grain sizes from each other are alternately arranged on the dressing face 4. The base metal 2 includes adjusters 7 for arbitrarily adjusting the height difference &dgr; between reference planes S1 and S2 of the respective abrasive grain units 5 and 6. The reference planes S1 and S2 each include the ends of the abrasive grains with the largest grain size.

Abstract: The present invention provides a dresser for a chemical and mechanical polishing cloth wherein a bonding material for retaining diamond grit is not dissolved and contamination of chemical slurry caused by dissolving of metal or peeling-off of diamond grit is prevented from occurring. A sintered product constituting the dressing face 2a is obtained by mixing a bonding material 4 consisting of silicon and/or silicon alloy with diamond grit 3, and forming and sintering the mixture. A carbide film 5 generated by sintering silicon in the bonding material into diamond is formed on the surface of the diamond grit 3. Thereby, the diamond grit is firmly bonded with the bonding material, and the bonding material is not dissolved. As a result, the contamination of the chemical slurry or the peeling-off of the diamond grit is prevented.

Abstract: The present invention provides a luminous storage material that emits a blue or bluish green light, that has high persistence, that is thermally and structurally stable, and that exhibits a high weather resistance in chemically severe conditions. The present invention also provides manufacturing method for this material. A blue aluminum silicate luminous storage material according to this invention is composed of a powdered product that has been activated by Eu.sup.2+ wherein its composition formula is expressed as follows:(M.sub.l-n-m M*.sub.n -Eu.sub.m)(Al.sub.1-x Si.sub.3/4 x.quadrature..sub.1/4.times.).sub.2 O.sub.4(wherein .quadrature. is vacancy; M is one or more types of alkali earth metal elements selected from a group of magnesium, calcium, strontium, and barium; M* is one or more types of bivalent metal elements selected from a group of manganese, zinc, and cadmium; and (n), (m), and (x) consist of numerical values meeting the ranges 0.ltoreq.n.ltoreq.0.2, 0<x<0.6, 0.0001.ltoreq.m.ltoreq.0.1).