Hitachi Global Storage Technologies Netherlands B.v.

International Business Machines Corporation

Hidetsugu Tanaka

Tsuyoshi Matsumoto

Yoshinao Harada

Yoshio Yamamoto

Masayuki Ishikawa

Masahiko Sato

Masayuki Kanamaru

Takao Chikazawa

Takumi Satoh

Futoshi Kitaizumi

Masahiro Nagayoshi

Atsushi Tatsugawa

Tatsushi Aoki

Embodiments of the present invention help to adjust the recess depth of a head element portion of a head slider. In an embodiment of the present invention, in a test step in manufacturing an HDD, the HDD examines the recess depth of a head element portion and decreases and adjusts the recess depth if the recess depth of the head element portion does not satisfy the predetermined condition. The HDD moves an actuator to a ramp of a retract position and supplies power to a heater in a head slider. If the heater power is large, the head element portion undergoes plastic deformation. The plastic deformation of the head element portion decreases the recess depth of the head element portion.

Head slider and disk drive device

Embodiments of the invention provide a manufacturing method for a disk drive which allows highly accurate recording of servo data without substituting the internal gas of the disk drive, and such a magnetic disk drive and servo track writer. In one embodiment, a disk, a magnetic head slider with a head for writing data onto and reading out data from the disk, a suspension for retaining the magnetic head slider, an arm for supporting the suspension, and a driving section for driving the arm are stored into an enclosure. When a servo track write operation is conducted, the enclosure interior is depressurized to an atmospheric pressure lower than normal pressure and then servo data is recorded on the disk.

Servo track write at low pressure using pressure insensitive air bearing surface

A disk storage medium and a disk drive which reduce friction during landing of the head/slider is described. The minimum fly height area of the head/slider is positioned over a texture free portion of the landing zone on the disk surface landing. In a preferred embodiment, the landing zone of a magnetic disk is a laser texture zone comprising a great number of bumps and is positioned during landing adjacent an area other than the minimum fly height area of the head/slider. The area facing the minimum fly height area of a head/slider has no bumps, i.e. is a bump free zone.

Disk drive disk with landing zone having textured and untextured regions

At least part of the surface of a read/write element of the magnetic head surface is coated with low surface energy materials. The low surface energy materials have sufficient humidity resistance, wetting resistance, and hydrophobicity to repel water from the coated surfaces. Such properties yield improved corrosion resistance for the coated surfaces. The low surface energy materials include fluorocarbon compounds (FCOC) and special materials such as perfluoroalkylpolyoxyethyleneethanol. The low surface energy materials are coated on the magnetic heads as thin films. The thin films have a thickness in the range of 5-100 angstroms, but are preferred in the range of 10-20 angstroms. The thin films provide sufficient adhesion on and corrosion protection of the heads without decreasing their performance.

Hard disk drive magnetic head coated with low surface energy material

A method for removing accumulated particles that have adhered to a head for reading/writing data to a rotation disk type recording medium in an information recording and reproducing apparatus. First a disk read/write operation is stopped. A vibration amplitude is then selected. The head repeatedly performs a seek operation with the selected amplitude so as to vibrate the head. A new vibration amplitude is then selected, and the head repeatedly performs seek operations with the new amplitude. The vibration amplitude is gradually changed so that the head performs seek operations over a range of amplitudes, thereby removing accumulated particles that have adhered to the head.

Method and apparatus for removing accumulated particles on a head in an information recording and reproducing apparatus

Growing community of inventors

Kanagawa, Japan

Hidetsugu Tanaka