Hitachi Electronics Engineering Co., Ltd.

Hitachi High-tech Electronics Engineering Co., Ltd.

Takahisa Ishida

Hisayoshi Ichikawa

Hideaki Amano

Teruaki Tokutomi

Kazuhiko Gommori

Kenya Wada

Kazuyuki Sonobe

Takeshi Sato

Yasunori Fukuyama

Tsutomu Nagakura

Fujio Tajima

Noritake Shizawa

An abrasive tape is supplied to a tape head by a tape supply unit and taken up from the tape head by a tape take-up unit. The tape head presses the abrasive tape against a surface of an object under polish, which is rotated by a rotating unit. A tape head pressuring unit utilizes a voice coil motor, for example. Since the tape head pressuring unit generates a pressuring force for pressuring the tape head using the electromagnetic force, it is able to set a minute pressuring force by controlling a drive signal, and to obtain the fine adjustment of the pressuring force easily by controlling the electric signal. Therefore, it becomes possible to press the abrasive tape against the surface of the object under polish with a desired low pressure.

Polishing apparatus with abrasive tape, polishing method using abrasive tape and manufacturing method for magnetic disk

An apparatus for forming a textured zone in a predetermined surface area on a magnetic data recording disc, which is capable of precisely controlling the position and range of the texturing zone. Bumps 4 are formed on a CSS zone on the inner peripheral side of a magnetic recording disc 1 by the use of a spindle means 6 and a laser beam bombarding means 7. The spindle means 6 is provided with a chuck mechanism 13 with opposingly confronting tapered surfaces 18a and 21a to hold a disc 1 in a centered position in alignment with the rotational axis of a spindle shaft 10. On the other hand, the laser beam bombarding means 7 has part of component parts of its optical system, from a laser energy source 34 up to an electromagnetic shutter 39, mounted on its main casing 7a, and has a reflector mirror 40 and an objective lens 41 accommodated in a movable housing 31 which is movable in the direction of its optical axis to displace a laser spot position on the surface of the disc 1 in a radial direction thereof.

Apparatus for texturing magnetic data recording disc surfaces

A disk texturing apparatus for texturing surfaces of a magnetic disk or the like with cross-pattern grooves. The texturing apparatus is basically constituted by a rotational drive having a spindle for supporting and rotating a disk, and a tape transport mechanism for moving a texturing tape across and in pressed with a texturing surface of said disk. The spindle of the rotational drive mechanism is arranged to hold a disk in an eccentrically deviated position off the rotational axis of the rotational drive. As a result, the disk is revolved along an eccentrically deflecting orbit around the rotational axis of said rotational drive while being rotated with the spindle, moving in and out in radial directions in a degree commensurate with the amount of deviation from said rotational axis to form cross-pattern grooves on the disk surface.

Disk texturing apparatus

Described herein is a disk washing apparatus for cleaning substrate disks of memory medium, which comprises in combination: a loader section having a magazine for holding a number of disks to be washed; a working section including a washing stage arranged to wash the front and rear faces of a disk simultaneously with inner and outer peripheral surfaces thereof, a rinsing stage arranged to rinse the front and rear faces of a disk simultaneously with inner and outer peripheral surfaces thereof, and a drying stage adapted to dry a washed and rinsed disk by high speed spin drying; an unloader section having a magazine for accommodating cleaned disks; and disk transfer chucks adapted to transfer disks one after another stepwise from the loader section to the unloader section, passing the disks successively to the washing, rinsing and drying stages of the working section, the washing, rinsing, and drying stages being located in series between the loader and unloader sections.

Disk washing apparatus

Growing community of inventors

Hadano, Japan

Takahisa Ishida