Abstract: A device manufacturing method is disclosed that includes the steps of moving a device at a constant speed while irradiating a laser beam on the device, and processing a part of the device with the laser beam.

Abstract: An elongated work is attached to an elongated holding surface opposed to a flat abrasive surface in a grinding device. The holding member is supported on a spherical receiving body so that the holding member changes its attitude around the spherical receiving body. The change of the attitude of the holding member reliably enables the work to uniformly contact with the flat abrasive surface. When relative movement is induced between the work and the flat abrasive surface, a chamfer is formed on the work with a high accuracy. The work is prevented from suffering from generation of microcracks and chipping. In addition, if the work moves on the flat abrasive surface only in one direction, the probability of generation of microcracks and chipping is considerably reduced.

Abstract: A head function evaluating apparatus designed to evaluate the function of a head. The apparatus allows the head to read out signals from a storage disk. The storage disk is mounted on a rotation shaft of a fluid bearing motor. The fluid bearing motor is employed to drive the storage disk for rotation. The fluid bearing motor is made smaller in size as compared with a so-called air spindle. In addition, the first and second flat surfaces are opposed to the front and back surfaces of the storage disk. The first and second flat surfaces serve to achieve so-called squeezing effect in the head function evaluating apparatus. This results in suppression of vibration of the rotating storage disk.