摘要:
A laminated body of a plurality of slit ceramic green sheets 10 with rod-shaped members 11 placed in the spaces defined by the slits 9 is sandwiched by two laminated ceramic green bodies of a plurality of blank ceramic green sheets 8, pressing to make the laminated ceramic green bodies integral with each other, and then after the rod-shaped members 11 are pulled out, the integrated laminated ceramic green bodies are sintered. Thus circular sectional channels 13 with reduced flow resistance for a coolant flowing therethrough are formed inside the ceramic circuit substrate 14. The channels 13 can have low flow resistance and can have high cooling efficiency.
摘要:
P-type semiconductor sheets and n-type semiconductor sheets formed by mixing a powder of semiconductor material, a binder resin, a plasticizer, and a surfactant are prepared. In addition, separator sheets formed by mixing a resin such as PMMA and a plasticizer are prepared. Through holes are formed in each of the separator sheets and then filled with a conductive material. Thereafter, the p-type semiconductor sheet, the separator sheet, the n-type semiconductor sheet and the separator sheet are stacked. The resultant laminated body is cut into a predetermined size and then subjected to a baking process.
摘要:
A head assembly includes a suspension having a gimbal, a flexible printed wiring sheet having a plurality of conductor patterns and adhered to the suspension, first and second piezoelectric actuators mounted on the gimbal, and a head slider mounted on the first and second piezoelectric actuators. The first and second piezoelectric actuators are adhered to the gimbal at end portion adhesion portions symmetrical with respect to the center of pivotal motion thereof and are adhered to the head slider at end portion adhesion portions on the opposite side disposed symmetrically with respect to the center of pivotal motion similarly. Consequently, when a voltage is applied to the first and second piezoelectric actuators through the flexible printed wiring sheet, a couple of forces can be generated which vary the posture of the head slider only in one direction around the center of pivotal motion.
摘要:
The present invention aims to provide a compact and lightweight piezoelectric actuator, a driving method involving the piezoelectric actuator that can provide a large displacement at a low voltage, and a compact and lightweight information storage device with a high recording density that incorporates such a piezoelectric actuator and has a small moment of inertia of a head when the head is driven. The piezoelectric actuator according to the present invention has four rod-shaped driving sections. Of the four rod-shaped driving sections, a voltage is applied to the two driving sections located along a diagonal line at a time, and the voltage is applied to the two driving sections located along the other diagonal line at a different time from the time for the first two driving sections, whereby two central sections are rotationally driven relative to two end sections.
摘要:
A piezoelectric actuator set includes a pair of elongated piezoelectric actuators. The elongated piezoelectric actuators establish the standard attitude of a head slider when no electric signal is supplied to the piezoelectric actuator set. When the electric signal is applied to the piezoelectric actuator set, the tip ends are pulled back toward the base ends in the elongated piezoelectric actuators. The piezoelectric actuator set generates a couple for driving the head slider for rotation around the rotational axis only in a predetermined direction from the standard attitude. The moment of inertia can be reduced in the head slider during rotation as compared with the case where the head slider is moved based on a swinging movement. The natural frequency can be raised in the vibration system comprising the head slider and the piezoelectric actuator set. The frequency of the electric signal or servo signal can be set over a wider frequency range.
摘要:
A piezoelectric device including an insulating substrate and a displacement layer formed on the insulating substrate including a first common electrode, a piezoelectric layer and a plurality of second electrodes laid on the insulating substrate in the stated order, where a part of a surface of the piezoelectric device in a region where the first and the second electrodes overlap each other is projected out of the rest part of the surface. The thus-formed piezoelectric device can increase the amount of displacement of the displacement layer.
摘要:
A method in which a multi-layered ceramic circuit board made of a hybrid laminate consisting of green sheets containing hollow silica and green sheets containing no hollow silica is manufactured without failures occurring during the firing of the laminate. By incorporating quartz glass into a first ceramic material containing hollow silica to replace part of the hollow silica with quartz glass, the compositions of the first ceramic material and a second ceramic material containing no hollow silica are controlled so that the difference between the percentages of shrinkage on firing of the green sheets formed of the first and second ceramic materials is within 1%.