A magnetoresistance effect element is provided with a magnetoresistance effect film (MR film) formed of alternative laminations of magnetic layers (for example, soft magnetic layers such as Fe--Ni--Co alloy layers) which are coupled anti-ferromagnetically with each other between adjacent magnetic layers and non-magnetic layers (for example, non-magnetic layers such as Cu layers) and provided with a bias soft magnetic layer (for example, SAL layer) for application of a bias magnetic filed to the ...

A magnetic head which is slidably in contact with a magneto-optical recording medium at the time of carrying out recording of information signals onto the magneto-optical recording medium. This magnetic head includes a magnetic core; a bobbin having an insertion hole into which the magnetic core is inserted, a recessed portion within which a coil is formed in a manner to surround the insertion hole, and a flange portion formed in a direction perpendicular to the length direction of the magnetic ...

A housing assembly for magnetic head supporting arms of a magnetic disk device includes a housing which has a cylindrically shaped through-hole having two bearings each provided at each end of the through-hole and is formed integrally with supporting arms for supporting magnetic heads. The housing has a cylindrically shaped collar which is constituted by a member having the same linear expansion coefficient as that of the bearings and is fitted between the bearings in an exact fitting dimensiona...

A cylinder motor apparatus includes a chassis, a shaft, a circuit board, a supporting member for supporting the shaft on the chassis in a freely rotatable state, a rotor fixed to the shaft, which has a stator housing having a circular, concave shape facing in a direction away from the supporting member and a magnet provided in the stator housing, a stator housed in the stator housing and fixed to the circuit board, and an electric circuit provided on the circuit board for controlling the rotatio...

An optical pickup comprises a slide member displaced between an inner periphery of an information recording medium and an outer periphery thereof, a laser-beam receiving and emitting device comprised of an emitting unit for irradiating the information recording medium with a laser beam and a receiving unit for receiving therein a laser beam reflected from the information recording medium, a first laser-beam receiving and emitting device holding means rotated so as to approximately linearly move ...

A negative-pressure air bearing slider structure includes a slider surface disposed adjacent to a data storage medium, and a leading edge relative to the motion of the data storage medium. A U-shaped rail with a closed end facing the leading edge and an open end facing the trailing edge is formed on the slider surface. The closed end of the U-shaped rail extends laterally across less than the width of the slider surface. In a first set of embodiments, there is a single U-shaped rail centered bet...

A scanning device for a disc-shaped information carrier about an axis of rotation having a linear motor that can displace the scanning unit in a radial direction. The linear motor comprises a first part and a second part guided with respect to each other in the radial direction by a straight guide. The first part comprises pairs of magnets having opposite directions of magnetization. The second part includes an electric coil system with winding portions. The linear motor is further provided with...

A multimedia decoder unit having error concealment and fast muting capabilities. The audio decoder provides error concealment using a dynamic recovery delay that is based on the error rate of an input digital bitstream and also uses frame repeating. The decoder allows fast audio muting whereby audio can be muted within two audio frames of a mute signal that immediately freezes the video frame, e.g., a channel change. With respect to the dynamic recovery delay, a template of fixed length is used ...

Tracking coils are fixed on side surfaces of a lens holder and a magnetic substance of axisymmetric shape is fixed on a lower surface of the lens holder, being sandwiched by a focusing coil. Moreover, end portions of the magnetic substance are opposed to respective N-pole surfaces of permanent magnets serving as a focusing driving device and a tracking driving device together with the above coils. As a result, a neutral position holding system for an objective lens can be formed of these permane...

A reed-type clamp device. The reed-type clamp device comprises a main body, a rotating ring, a reed and a clamp. The rotating ring has a ring portion and a lever portion. The ring portion has a plurality of protrusions formed on the inner circumference of the ring portion. The rotating ring is disposed on the main body and rotates clockwise and counterclockwise. A plurality of swing arms are extended from the outer edge of the reed. The swing arm has an outer end fixed on the main body and a dri...