A coated abrasive belt (100) includes a belt backing (110) and an abrasive layer disposed thereon. The abrasive layer comprises abrasive elements (160) secured to at least a portion of a major surface of the belt backing (110) by at least one binder material. The abrasive elements are disposed at contiguous intersections of horizontal (192) and vertical lines (194) of a rectangular grid pattern. Each abrasive element has at least two triangular abrasive platelets (130), each having respective top and bottom surfaces connected to each other, and separated by, three sidewalls. On a respective basis, one sidewall of the triangular abrasive platelets is disposed facing and proximate to the belt backing A first portion of the abrasive elements is arranged in alternating first rows (16) wherein the triangular abrasive platelets are disposed lengthwise aligned with the vertical lines (194). A second portion of the abrasive elements is arranged in alternating second rows (168) wherein the triangular abrasive platelets (130) are disposed lengthwise aligned with the horizontal lines (194). The first and second rows repeatedly alternate along the vertical lines. Methods of making and using the coated abrasive belt are also disclosed.

A coated abrasive belt (100) includes a belt backing (110) and an abrasive layer disposed thereon. The abrasive layer comprises abrasive elements (160) secured to at least a portion of a major surface of the belt backing (110) by at least one binder material. The abrasive elements are disposed at contiguous intersections of horizontal (192) and vertical lines (194) of a rectangular grid pattern. Each abrasive element has at least two triangular abrasive platelets (130), each having respective top and bottom surfaces connected to each other, and separated by, three sidewalls. On a respective basis, one sidewall of the triangular abrasive platelets is disposed facing and proximate to the belt backing A first portion of the abrasive elements is arranged in alternating first rows (16) wherein the triangular abrasive platelets are disposed lengthwise aligned with the vertical lines (194). A second portion of the abrasive elements is arranged in alternating second rows (168) wherein the triangular abrasive platelets (130) are disposed lengthwise aligned with the horizontal lines (194). The first and second rows repeatedly alternate along the vertical lines. Methods of making and using the coated abrasive belt are also disclosed.

An abrasive article comprises: a substrate comprising strands forming first void spaces between strands; a laminate joined to the substrate, wherein the laminate comprises a surface opposite to the substrate; a resin composition joined to the surface of the laminate. First and second portions of the surface of the laminate have respective first and second surface free energies that are different. Another abrasive article comprises: a substrate comprising strands forming first void spaces between strands; a laminate joined to the substrate, wherein the laminate comprises a first polymer and a second polymer; a resin composition joined to the laminate; In both embodiments, abrasive particles are joined to the resin composition, and a plurality of second void spaces extends through the laminate coinciding with first void spaces in the porous substrate. A method of making abrasive articles is also disclosed.

An abrasive article comprises: a substrate comprising strands forming first void spaces between strands; a laminate joined to the substrate, wherein the laminate comprises a surface opposite to the substrate; a resin composition joined to the surface of the laminate. First and second portions of the surface of the laminate have respective first and second surface free energies that are different. Another abrasive article comprises: a substrate comprising strands forming first void spaces between strands; a laminate joined to the substrate, wherein the laminate comprises a first polymer and a second polymer; a resin composition joined to the laminate; In both embodiments, abrasive particles are joined to the resin composition, and a plurality of second void spaces extends through the laminate coinciding with first void spaces in the porous substrate. A method of making abrasive articles is also disclosed.

An abrasive disc sheet article having patterns of vitrified abrasive particle agglomerate molded islands attached in annular bands on a flexible disc backing is used for high-speed water-spray cooled abrading and polishing without hydroplaning of workpieces. Hydroplaning is prevented as excess coolant water flows around the islands instead of forming a thick water film that separates the island abrasive and the workpiece. Vitrification encapsulates individual abrasive particles in glass to strongly support them to resist abrading forces and to allow them to be progressively worn down for full utilization of expensive diamond particles. Slow eroding of the agglomerates also results in very long abrade life of the abrasive discs. A porous filler material attached to the disc backing between the island structures carries water to contact the wafer surface and cool it during abrading. Interchangeable discs having different abrasive particle sizes are quickly attached with vacuum to flat rotatable platens.

A multiphase abrasive particle precursor is disclosed. The precursor includes a first phase of a first material with a substantially constant first composition throughout the first phase. The precursor also includes a second phase, of a second material, with a substantially constant composition throughout the second phase. The precursor includes an interface between the first and second phases. The multiphase abrasive particle precursor is a shaped abrasive particle precursor.

A coated abrasive article comprises a backing having first and second opposed major surfaces, a make layer disposed on at least a portion of the first major surface and bonding abrasive particles to the backing, a size layer overlaid on at least a portion of the make layer and the abrasive particles, and a supersize layer disposed on the size layer. The supersize layer comprises an at least partially cured water-based epoxy resin and an organic polymeric rheology modifier, and wherein the amount of the at least partially cured epoxy resin comprises from 75 to 99.99 weight percent of the combined weight of the at least partially cured epoxy resin and the organic polymeric rheology modifier. A method of making the coated abrasive article is also disclosed.

Embodiments relate to a porous polishing pad for use in a chemical mechanical planarization (CMP) process of semiconductors and a process for preparing the same. According to the embodiments, the size and distribution of the plurality of pores contained in the porous polishing pad can be adjusted in light of the volume thereof. Thus, the plurality of pores have an apparent volume-weighted average pore diameter in a specific range, thereby providing a porous polishing pad that is excellent in such physical properties as polishing rate and the like.

A sanding device for sanding a workpiece. The sanding device includes a sanding block. The sanding block includes a right triangular block having a triangular base and a rectangular block having a rectangular base. The rectangular block may be affixed to a side surface of the right triangular block. The sanding block includes sanding block base surfaces having the triangular base abutting the rectangular base along a straight edge. The sanding block base surfaces include an abrasive surface and an engagement surface opposite the abrasive surface. The engagement surface includes a hand-shaped recess extending from the engagement surface towards the abrasive surface. The hand-shaped recess includes a thumb-shaped recess in the triangular base of the engagement surface and at least one non-thumb-shaped recess in the rectangular base of the engagement surface.

A sanding device for sanding a workpiece. The sanding device includes a sanding block. The sanding block includes a right triangular block having a triangular base and a rectangular block having a rectangular base. The rectangular block may be affixed to a side surface of the right triangular block. The sanding block includes sanding block base surfaces having the triangular base abutting the rectangular base along a straight edge. The sanding block base surfaces include an abrasive surface and an engagement surface opposite the abrasive surface. The engagement surface includes a hand-shaped recess extending from the engagement surface towards the abrasive surface. The hand-shaped recess includes a thumb-shaped recess in the triangular base of the engagement surface and at least one non-thumb-shaped recess in the rectangular base of the engagement surface.