Combination of glide height tester or accoustic emission tester and AFM
Original Publication Date: 1999-Dec-01
Included in the Prior Art Database: 2003-Jun-19
This article describes a combination of a Glide Hight Tester (GHT) or Accoustic Emission Tester (AET) and an Atomic Force Microscope (AFM) for detecting the topography of defects on magnetic disks. Current procedures require at least two devices to locate a defect position on a disk, to mark it and to characterize it. In transferring the disks from the first device on which the detection of the defect was made to the second device which carries out the actual characterization, the disk must be removed from the spindle. In doing so, the reference points of the spindle coordinate system are lost. German Patent Application 198 11 347.1 describes a combination of a MAG tester (magnetic tester, spin tester) and AFM/MFM which is able to directly and quickly detect and characterize sub-micrometer defects on the surface of magnetic disks.