Abstract: A magnetic disk apparatus includes a magnetic disk on which information is stored, a magnetic head which performs writing-in and reading-out of information, a suspension which supports the magnetic head, and a suspension supporting member having a &phgr;-shaped hinge. The suspension is supported at a tip end of the &phgr;-shaped hinge and an actuator for moving the magnetic head to a predetermined position on the magnetic disk is disposed so as to bridge an open portion of the &phgr;-shaped hinge. The actuator is coated with a resin material.

Abstract: A disk drive comprising a rotor, to which a disk and a plurality of magnets are fixed, and an open-slot type integrally molded stator disposed about an outer periphery of the magnets, and wherein the stator comprises coils formed by etching metallic films on teeth. The invention may also be applied to a closed-slot type stator. With either type, it is possible to produce an opening that is equal to or smaller than the thickness of a coil wire and cogging torque is minimized.

Abstract: An object of the invention is to inhibit a turning force of a magnetic disc apparatus from being reduced. In order to achieve the object, there is provided a magnetic disc apparatus having a rotor to which a magnetic disc fixed, and a stator which is filled with a resin between stator coils, wherein a member having a lower expansion coefficient than a thermal expansion coefficient of the resin is arranged between the stator coils.

Abstract: A magnetic disk drive includes a base constituting at least a face included in an enclosure; a shaft secured to the base; a rotor which rotates around the shaft as a rotary axis; a stator for rotating the rotor; and a magnetic disk secured to the rotor; wherein the stator is disposed on a face facing the base. This improves durability of the magnetic disk drive.

Abstract: An actuator of a magnetic disk has a laminated construction of piezoelectric flat sheet in which there are two polarized regions separated by a non-polarized region and the polarization direction and the direction of applied magnetic fields are the same as the thickness direction of the piezoelectric flat sheet. The actuator is fixed in such a manner as to bridge the top surfaces of the suspension and suspension-supporting member of the magnetic disk, and is coated with a resin material. The actuator enables vertical vibrations and dust generation which occur in association with the movement of the supporting member to be reduced and the accuracy of head positioning to be improved.

Abstract: An integrated circuit design apparatus includes a block placement processing unit which performs processing of creation of a lower-rank mounting block in a higher-rank mounting block, and performs processing of creation of virtual placement regions in each of the lower-rank mounting block and the higher-rank mounting block. A functional block assignment processing unit performs processing of assignment of functional blocks to each of the virtual placement regions provided by the block placement processing unit. An evaluation processing unit provides a display of a condition of the functional blocks assigned to each of the virtual placement regions of both the lower-rank mounting block and the higher-rank mounting block, in order to evaluate the condition of the assigned functional blocks.

Abstract: Provided is a magnetic disc apparatus comprising a magnetic head for writing and reading data to and from a magnetic disc, a slider for floating up the magnetic head from the magnetic disc on rotation, a suspension having an IC chip mounting surface, for supporting the slider, a positioning mechanism for positioning a magnetic head at a predetermined position, and an IC chip mounted on the IC chip supporting surface of the suspension, wherein the rate of variation in temperature difference between opposite sides of the IC chip mounting position as a center on the IC chip mounting surface is set to be below abut 3.5 K/sec. Thereby it is possible to restrain the averaged seek time for the magnetic disc from becoming longer.

Abstract: Provided is an actuator of a magnetic disk, said actuator having a laminated construction of piezoelectric flat sheet in which there are two polarized regions separated by a non-polarized region and the polarization direction and the direction of applied magnetic fields are the same as the thickness direction of the piezoelectric flat sheet. The actuator is fixed in such a manner as to bridge the top surfaces of the suspension and suspension-supporting member of the magnetic disk, and is coated with a resin material.

Abstract: Electronic components are bonded to an electronic circuit board with a lead-free solder. The bonded structure is cooled from a temperature close to the liquids temperature of the solder to a temperature close to the solids temperature of the solder at a first cooling rate of about 10 to 20° C./second, followed by cooling the bonded structure to a temperature lower than the solids temperature of the solder at a second cooling rate of about 0.1 to less than 5° C./second.

Abstract: A stable low-connecting resistance connection arrangement having a high yield rate without using any special material or process for a substrate. A flip-chip connecting structure in which the semiconductor integrated circuit (IC) chip is mounted directly on an organic circuit substrate. To achieve reliable connection and low-connecting resistance, the present invention absorbs variation of the heights of projecting electrodes formed on a semiconductor IC chip and substrate electrodes of an organic circuit substrate for example, by deforming the substrate electrodes and/or substrate layer of the organic circuit substrate. Resin of a conductive paste disposed between the projecting electrodes and substrate electrodes is squeezed out leaving a high density conductive particle layer to lower a contact resistance between such electrodes.

Abstract: A projection-type stereoscopic image display system is disclosed in which a left-eye projection light ray and a right-eye projection light ray are projected from behind a transparent screen thereby to display a stereoscopic image.