US 2002/0118485 A1 · Magnetic disk unit

Abstract

In the magnetic disk unit comprising suspensions in each of which an IC is mounted on a load beam, a magnetic head displacement caused by the warp of the load beam occurring due to heat generated from the IC is compensated, whereby the shortening of an access speed and high reliability of reading/writing are realized. The thermal displacement of the magnetic head is compensated by operating micro actuators on the load beam in accordance with the temperature rise of the IC which is measured by a temperature sensor. Namely, by driving the micro actuators so that the magnetic head may move in a direction reverse to the direction of the magnetic head movement caused by the thermal displacement, the thermal displacement of the magnetic head is made to be substantially zero.

Claims13

Dependent claims

A magnetic disk unit comprising:

magnetic disks on each of which information is recorded;
magnetic heads each performing reading/writing of information on each of said magnetic disks;
suspensions each supporting each of said magnetic heads;
a carriage supporting said suspensions;
coarse actuators for largely moving each of the magnetic heads through the carriage;
micro actuators for slightly moving each of the magnetic head;
an IC for amplifying reading/writing signals of each of the magnetic head which IC is mounted on each of said suspensions;
a sensor for detecting a temperature of said IC during the reading or writing of information performed by one of the magnetic heads;
and
controlling means for driving and controlling said micro actuators in accordance with values detected by said sensor.

7 more elements

Dependencies are inferred from the claim text.

Magnetic disk unit

Life of this patent

Magnetic disk unit

Life of this patent

Abstract

Claims13