公开(公告)号：US06989949B2

公开(公告)日：2006-01-24

申请号：US10346056

申请日：2003-01-17

申请人： Tsz Lok Cheng ,  Tamon Kasajima ,  Masashi Shiraishi ,  Katsuhiko Tomita ,  Takashi Honda ,  Takeshi Wada

发明人： Tsz Lok Cheng ,  Tamon Kasajima ,  Masashi Shiraishi ,  Katsuhiko Tomita ,  Takashi Honda ,  Takeshi Wada

IPC分类号： G11B27/36

CPC分类号： G11B5/455 ,  G11B2005/001

摘要： A method of testing a performance of the HGA has a step of writing information from the at least one thin-film magnetic head element onto a magnetic disk with driving the actuator for displacement by applying an alternating drive signal to the actuator, a step of reading out the information of at least one rotation of the magnetic disk by the at least one thin-film magnetic head element without driving the actuator for displacement, a step of storing the information read-out from the magnetic disk as a read-out information along a disk-rotating direction, a step of moving the HGA toward an off-track direction by a predetermined distance, a step of repeatedly executing the reading, storing and moving steps to obtain two-dimensional read-out information along the disk-rotating direction and the off-track direction, and a step of determining, from the two-dimensional read-out information, an off-track position where the read-out information becomes maximum at each position along the disk-rotating direction, the determined off-track positions being recognized as displaced positions of the actuator in response to the applied alternating drive signal.

摘要翻译： 测试HGA的性能的方法具有将信息从至少一个薄膜磁头元件写入到磁盘上的步骤，通过向致动器施加交替的驱动信号来驱动用于位移的致动器，读取步骤 通过所述至少一个薄膜磁头元件输出磁盘的至少一圈的信息，而不驱动用于移位的致动器;将从磁盘读出的信息作为读出信息存储的步骤 盘旋转方向，将偏移方向移动到离轨道方向预定距离的步骤;重复执行读取，存储和移动步骤以沿盘旋转方向获得二维读出信息的步骤 和偏离磁道方向的步骤，以及从二维读出信息确定读出信息在沿磁盘的每个位置处变为最大的偏离磁道位置的步骤， 响应于所施加的交替驱动信号，所确定的离轨位置被识别为致动器的位移位置。