公开(公告)号：JPH11353865A

公开(公告)日：1999-12-24

申请号：JP13348599

申请日：1999-05-14

Applicant: IBM

Inventor： THOMAS ROBERT ALBRECHT ,  BIJAISHUWAA DAS KANNA ,  SURESH KUMAR ,  SRI MUSHZAMBI SREEJAYANZA

IPC: G11B33/12 ,  G11B25/04 ,  H04L25/03

Abstract: PROBLEM TO BE SOLVED: To provide a microminiature disc drive employing a tab base of sheet metal and plastic conformable to CompactFlash (trade mark) type II form factor and interface specifications. SOLUTION: A base 10 supports the components of a disc drive, i.e., a spindle motor with a loaded disc, a voice coil motor actuator fixed with a read/write head, and preamplifier/write driver electronic module. The composite base is a metal plate 12 having a flange extending on the periphery, and a plastic flame 14 surrounding the metal plate 12 while wrapping the flange. Since the metal plate 12 supporting the spindle motor and the voice coil motor actuator of the disc drive is made of a substance having high permeability and low coercive force, it can form a part of the magnetic circuit of the spindle motor and the actuator.

公开(公告)号：SG95584A1

公开(公告)日：2003-04-23

申请号：SG1998001205

申请日：1998-06-05

Applicant: IBM

Inventor： SRI MUTHUTHAMBY SRI-JAYANTHA ,  VIJAYESHWAR DAS KHANNA ,  SURESH KUMAR ,  HEN PHU DANG

IPC: G11B5/54 ,  G11B5/55 ,  G11B5/82 ,  G11B19/04 ,  G11B21/00

Abstract: A data storage device 12 includes a disk 14 having a surface zone 14a for storing data, and an access head 18 mounted on a slider 20 for writing data to and reading data from the data zone. The head 18 flies across the data zone 14a to access selected data tracks during spinning of the disk. And, the slider 20 seeks a predetermined shock buffer zone 30 atop the spinning disk, where critical data is not stored, during an idle mode for confining thereto any shock induced contact between the slider and disk surface.

公开(公告)号：SG77235A1

公开(公告)日：2000-12-19

申请号：SG1999002230

申请日：1999-05-11

Applicant: IBM

Inventor： ALBRECHT THOMAS ROBERT ,  SURESH KUMAR ,  MUTHUTHAMBY SRI-JAYANTHA SRI ,  DAS KHANNA VIJAYESHWAR

IPC: G11B25/04 ,  G11B33/02 ,  G11B5/012

Abstract: A miniature removable disk drive that meets the CompactFlash type II form factor and interface specifications uses a composite sheet metal/plastic tub-shaped base for supporting the disk drive components, e.g., the spindle motor with attached disk, the voice coil motor actuator with attached read/write head, and the preamplifier/write driver electronics module. The composite base is a metal plate with a flange extending around its perimeter and a plastic frame that encapsulates the flange and surrounds the perimeter of the metal plate. The metal plate supports the disk drive spindle motor and voice coil motor actuator and is made of high magnetic permeability, low coercivity material so that it can form part of the magnetic circuit of the spindle motor and/or actuator. The flanges on the metal plate provide rigidity and allow the base to be fabricated by injection molding the plastic frame onto the metal base so that the plastic encapsulates the metal flanges to form the walls of the tub-shaped base. An electronics card is located beneath the metal plate and is electrically shielded from the read/write heads and electronics module by the metal plate. Top and bottom covers are attached to the frame to enclose the disk drive components and the electronics card. Because the frame is made of plastic the corners may be made with intricately shaped cutouts that allow elastomeric corner bumpers to be interlocked into the frame at the corners. The corner bumpers extend beyond the frame and the covers so as to provide shock protection if the miniature removable disk drive is dropped.