摘要:
A hard disk drive with a spindle motor that rotates a disk. When the disk drive is exposed to low temperatures a current can be provided to the spindle motor to heat the motor. For example, a DC current can be provided to the spindle motor. The current flowing through the spindle motor coil generates heat. The current can be provided for a predetermined time interval to sufficiently heat the spindle motor so that the fluid bearings of the motor can operate. The current is terminated and then an AC current is provided to the spindle motor to cause motor rotation.
摘要:
A hard disk drive with a spindle motor that rotates a disk. When the disk drive is exposed to low temperatures a current can be provided to the spindle motor to heat the motor. For example, a DC current can be provided to the spindle motor. The current flowing through the spindle motor coil generates heat. The current can be provided for a predetermined time interval to sufficiently heat the spindle motor so that the fluid bearings of the motor can operate. The current is terminated and then an AC current is provided to the spindle motor to cause motor rotation.
摘要:
A system with a visual display that provides an indication of a reliability of a hard disk drive of the system. The visual display may display the number of sector reallocations that have been performed by the disk drive. The display is coupled to a system housing so that a user can readily determine the reliability of the disk drive.
摘要:
A method for operating an optical projection system including projection optics is disclosed. The projection optics project an image of the object on the substrate at an image distance from the projection optics. The image has a size dependent on the size of the object and the ratio of the image distance to the optical distance of the object from the projection optics. The image distance can change with changes in the condition of the projection optics such as changes in the temperature of elements of the projection optics. The image distance is monitored. If the image distance changes, the substrate is moved to the new image distance and the optical distance of the object is correspondingly changed such that the ratio of the image distance to the object distance stays the same.
摘要:
An amorphous silicon layer on a glass substrate is crystallized by concentrating CW radiation from a number of OPS-lasers into a line of light on the layer. The layer is moved with respect to the line of light to control the dwell time of the line on any location on the layer and to crystallize an extended area of the layer.
摘要:
An optical system for projecting an image of a photomask on a substrate, using a Schwarzschild objective includes an excimer laser, beam shaping optics for shaping a laser beam from the laser and a beam-dividing prism. The beam-dividing prism has a dividing-face including four facets inclined at an angle to each other. The four facets divide the shaped beam into four beam-portions propagating at an angle to the system axis. The beam-portions overlap at the photomask and mutually diverge into the entrance aperture in the concave mirror of the Schwarzschild objective such that all of the light in the beam portions is incident on the convex mirror of the objective in an annular zone outside of the central obscuration zone of the convex mirror. This essentially eliminates transfer losses normally caused by this obscuration zone.
摘要:
An amorphous silicon layer on a glass substrate is crystallized by concentrating CW radiation from a number of OPS-lasers into a line of light on the layer. The layer is moved with respect to the line of light to control the dwell time of the line on any location on the layer and to crystallize an extended area of the layer.
摘要:
Apparatus for a mask-projection laser system with a laser beam includes a homogenizer having entrance and exit arrays of cylindrical lenses spaced apart in the direction of propagation of the laser beam. A pre-homogenizer is arranged to pre-homogenize the beam such that entrance pupil of the projection lens is about uniformly illuminated.
摘要:
A disk drive includes a drive housing, a storage disk, a slider and a drive circuitry. The slider magnetically interacts with the storage disk, and includes a read/write head that is positioned to have an actual head-to-disk spacing greater than zero nanometers during rotation of the storage disk. The drive circuitry can determine and/or monitor the actual head-to-disk spacing at any time during the operation of the disk drive based on an amplitude or a change in the amplitude of a signal such as a variable gain amplifier signal. In one embodiment, the slider includes a slider mover that receives current via the drive circuitry and causes a deformation of a portion of the slider to change the head-to-disk spacing based on the amplitude of the signal. In another embodiment, the read/write head moves during substantially consistent rotational velocity of the storage disk from a first actual head-to-disk spacing equal to approximately zero nanometers, to a second actual head-to-disk spacing that is greater than zero nanometers based on a desired amplitude of the signal.
摘要:
A disk drive includes a rotatable storage disk, an actuator motor, a slider that magnetically interacts with the storage disk, and a drive circuitry. A portion of the slider moves between a first position wherein the slider does not contact the storage disk and a second position wherein the slider contacts the storage disk. The drive circuitry can detect when the position of the slider changes between these positions. In one embodiment, the drive circuitry monitors off-track movement of the slider to detect when the slider has moved between these positions. The drive circuitry can also current that is directed to the actuator motor that is used to compensate for off-track movement to detect when the slider moves between these positions. In yet another embodiment, the drive circuitry monitors a rotational velocity of the storage disk to detect approximately when the slider moves between these positions.