Dresser for abrasive cloth

Abstract

The invention provides a dresser for an abrasive cloth, which has a smaller abrasive grain diameter than the conventional dresser and has an abrasive grain spacing regulated in a predetermined range depending upon the abrasive grain diameter to simultaneously meet a high level of pad grinding power and a pad flatness and, at the same time, is less likely to cause dropout of abrasive grains. The dresser comprises a plurality of abrasive grains fixed as a single layer on a surface of a metallic support material. The dresser is characterized in that the metallic support material on its surface on which the abrasive grains are fixed has a convex shape, the difference in height between the end part and the central port on the surface is not less than 3 μm and not more than 40 μm, and the center-to-center spacing between at least one set of adjacent grains is d≦L<2d wherein d represents the diameter of the abrasive grains; L represents the center-to-center spacing between adjacent abrasive grains. The diameter (d) of the abrasive grains is preferably 3 μm≦d<100 μm.

1 . A dresser for an abrasive cloth comprising:
 a metallic support; and   abrasive grits secured to a surface of the metallic support in a single layer,   wherein the surface to which the abrasive grits are secured has a convex shape,   the height difference between the center and the periphery of the surface is 3 μm to 40 μm, and   at least one pair of the nearby abrasive grits satisfies the relationship d≦L<2d, where d is the abrasive grit diameter and L is the center-to-center spacing between the nearby abrasive grits.   
     
     
         2 . The dresser according to  claim 1 , wherein the height difference between the center and the periphery of the surface of the metallic support to which the abrasive grits are secured is 5 μm to 20 μm. 
     
     
         3 . The dresser according to  claim 1  or  2 , wherein the abrasive grit diameter satisfies the relationship 3 nm≦d<100 nm. 
     
     
         4 . The dresser according to any one of  claims 1  to  3 , wherein the abrasive grits are at least one of diamond grits, cubic boron nitride grits, boron carbide grits, silicon carbide grits, and aluminum oxide grits. 
     
     
         5 . The dresser according to any one of  claims 1  to  4 , wherein the abrasive grits are secured to the surface of the metallic support by brazing. 
     
     
         6 . The dresser according to any one of  claims 1  to  5 , wherein the metallic support is made of stainless steel.