Patent ID: 7303599
Filing Date: 2007-12-04
Classification: B24B,B24D,Y10S

Abstract:
1. A method for manufacturing a lapping board having abrasive grains fixed thereon, which comprises the steps of: (a) providing a rotatable metal board having a surface made of soft metal; (b) arranging an abrasive slurry-supplying means over the surface of the metal board, the abrasive slurry-supplying means containing an abrasive slurry therein in which abrasive grains are suspended in a liquid medium; (c) placing an abrasive-pressing means on the surface of the metal board, the abrasive-pressing means having a surface harder than the surface of soft metal; (d) attaching a ultrasonic oscillation-generating means to either or both of the abrasive-pressing means and the metal board; (e) rotating the metal board while supplying the abrasive slurry onto the surface of the metal board from the abrasive slurry-supplying means; (f) supplying electric power to the ultrasonic oscillation-generating means to generate ultrasonic oscillation and apply the generated ultrasonic oscillation to either or both of the abrasive-pressing means and the metal board, whereby supplying the abrasive slurry between the soft surface of the metal board and the hard surface of the abrasive-pressing means, whereby fixing some of the abrasive grains onto the soft surface of the metal board under the condition that a portion of the abrasive grain is embedded into the soft surface of the metal board and a remaining portion of the abrasive grain is exposed over the soft surface of the metal board; and (g) removing unfixed abrasive grains from the soft surface of the metal board.