Abstract: The grease composition for a clean environment includes, a base oil, a thickener and a extreme-pressure agent, in which a kinetic viscosity of the base oil at 40° C. is 100˜300 mm2/s, the thickener comprising a lithium complex soap, a content of the thickener is 10˜40 mass % with respect to the total amount of the grease composition.

Abstract: The grease composition for a clean environment includes, a base oil, a thickener and a extreme-pressure agent, in which a kinetic viscosity of the base oil at 40° C. is 100˜300 mm2/s, the thickener comprising a lithium complex soap, a content of the thickener is 10˜40 mass % with respect to the total amount of the grease composition.

Abstract: A magnetic head 10 includes a pair of a C-type core 11 and an I-type core 12 which are butt-joined together, a gap section 14 defined between the butt-joined surfaces of the cores, track width regulating grooves 11b, 12b which are formed in a magnetic medium slide surface so as to limit the width of the gap 14 to a predetermined width, and bonding glass 16 bonded to the track width regulating grooves. The I-type core has track width regulating grooves which extend from the butt-joined surface to the outer side surface within at least the magnetic medium slide surface, and a reinforcing member 15 is attached to the outer side surface of the I-type core, so that the magnetic medium slide surface is extended.

Abstract: In a magnetic head for writing/reading a magnetic disk comprising sliders (15, 16) having sliding surfaces which are brought into contact with a surface of the magnetic disk so as to slide relatively to the magnetic disk and a spacer (20) for adjusting height of the sliders (15, 16), each of the sliders (15, 16) is formed from a nonmagnetic material consisting of calcium titanate, and the spacer (20) is formed from a ferrite-group magnetic material, the ferrite-group magnetic material being selected to have substantially the same coefficient of thermal expansion as that of the nonmagnetic material.

Abstract: A magnetic head carriage including a head carriage (13), a gimbal (11) which has a magnetic head (12) attached thereon and is fixed to one surface of the head carriage (13), a flexible substrate (14) fixed to the other surface of the head carriage (13), and leads (12d, 12e, 12f, 12f) from the magnetic head (12) and are conductively connected to electrodes (15, 16, 17, 18) formed on the flexible substrate (14), the head carriage (13) comprising opening holes (14a, 14b, 14c, 14d) which are opened in the flexible substrate (14) in the vicinity of the electrodes (15, 16, 17, 18) so as to position the leads (12d, 12e, 12f, 12g) at the respective electrodes (15, 16, 17, 18).

Abstract: A magnetic head for use with a floppy disk device includes sliders (15, 16) formed in such a way that a magnetic head core (11) having a normal capacity is interposed between them and a magnetic head core having a large capacity (12) formed so as to be adjacent to one of the sliders. Grooves (15b, 15c, 20, 21) are respectively formed in the joints between the magnetic head core (11) having a standard capacity and the sliders (15, 16) and the joint between the magnetic head core having a large capacity (12) and the adjacent slider.

Abstract: An improved disc drive is capable of compensating the relative positional shift of a head caused mainly by a temperature change. The disc drive includes a frame having a disc holder for rotatably driving a disc, a head for reading information recorded in the disc, a head carriage which is movable in a predetermined radial direction of the disc, a rotation shaft extending in parallel with the radial direction, a driving mechanism for moving the head carriage in the radial direction by engaging with the rotation shaft, an adjustment mechanism for compensating the positional shift of the head due to a change of ambient temperature by providing an additional deformation of the adjustment mechanism to the carriage.

Abstract: In a magnetic head having composed of a reading core and a trailing core, not only an air bearing surface of the reading core is formed so as to be a single air bearing surface, but also the operation of forming a track width and chamfering portions is performed on a common surface with the reading core and the trailing core bonded to each other.

Abstract: A magnetic head in a hard disk device includes a leading core and a trailing core having a magnetic circuit winding, the trailing core is made of non-magnetic monocrystal ferrite, and magnetic metal films are provided in the magnetic path forming regions of the leading core and the trailing core.