Patent ID: 6918815
Filing Date: 2005-07-19
Classification: B24B

Abstract:
1. A system for predicting the lapping property of a lapping plate, comprising: a rotatable platform; a lapping plate mounted to the rotatable platform for rotation therewith and having an axial center; a holder having a specimen mounted thereto and an axial center, and the holder being positioned on the lapping plate, the holder also being undriven but free to rotate about the axial center of the holder relative to the lapping plate; a fixture positioned adjacent to the lapping plate, the fixture having a stationary base, an arm mounted to and extending away from the base toward the lapping plate, and a guide feature mounted to the arm for contacting and supporting the holder in a single radial and angular position with respect to the axial center of the lapping plate; friction detection means mounted to the fixture for measuring frictional force between the lapping plate and the specimen; and a distance sensor mounted to the holder for detecting a gap distance between the distance sensor and the lapping plate; and a weight added to a top of the holder so that the specimen and the lapping plate experience a pressure that is analogous to a slider lapping pressure.