Abstract: A magnetoresistive head comprising longitudinal bias layers composed of .alpha.-Fe.sub.2 O.sub.3 provided under an magnetoresistive layer in close contact therewith, wherein an exchange anisotropic magnetic field is applied to the magnetoresistive layer from the longitudinal bias layers and the coercive force of the magnetoresistive layer is increased to several hundred Oe in exchange coupling regions with which the longitudinal bias layers are in close contact. The magnetization direction of the exchange coupling regions becomes stable in the x axis direction and sufficient longitudinal bias magnetic field is thereby applied to an region corresponding to the track width (Tw) of the magnetoresistive layer. Therefore, decreased Barkhausen noise and improved magnetic detection characteristics are achieved.

Abstract: A suspension for a read/write head of a disk drive is fixed to a side wall of an arm. If two heads are to be suspended, a first suspension for one head and a second suspension for the other head are fixed to opposite side walls of the arm. Since the suspension is fixed to the side wall of the arm, there are no screw heads protruding or projections formed by hot staking on the top and the bottom surfaces of the arm and it is not necessary to make screw holes which extend from the top surface or the bottom surface into the arm perpendicularly to these surfaces. Thus, the vertical thickness of the head carriage assembly can be decreased.

Abstract: The portions on the sides far to each other of two sensor coils wound around the outer circumferential portion of the conduit, through which the fluid passes, at the suitable interval are thermally joined through a thermal conductor and the thermal conductor is heated by means of a heater, whereby the flow rate of fluid can be accurately measured without being influenced by the posture error resulting from the convection.

Abstract: A mass flow meter includes a housing body having a fluid passageway extending therethrough with a capillary tube communicating with the fluid passageway. The capillary tube is connected through a pair of metallic sleeves mounted on a base member which in turn is fastened to the housing body. A pair of sensor coils is connected to the capillary tube to measure any fluid flow. A metal sensor case is welded airtight to the base member to encapsulate the capillary tube.

Abstract: A ball bearing assembly includes a ball retainer for retaining within a predetermined area each of the balls positioned between an inner race and an outer race, the retainer having grease feeding holes which extend toward the balls. Grease is fed only to those balls which actually need lubrication, and no remaining grease flows into a gap between the inner race or the outer race and the ball retainer, therefore frictional force does not increase. In the preferred embodiment, the ball bearing assembly is used to support a head and carriage assembly of a data storage disk apparatus.

Abstract: An acoustic surface wave element having an oscillation frequency stable against temperature changes, and a wide range of oscillation frequency adjustment, is provided by an acoustic surface wave element comprising: a substrate of a 36.degree. rotated Y-cut single crystal lithium tantalate having X, Y and Z crystal axes and a top surface and side walls; electrodes formed on the top surface of the substrate such that an acoustic surface wave is propagated in a direction of the X-axis of the substrate and an oscillation of the acoustic surface wave occurs at a predetermined frequency, the electrodes having a thickness equal to 1 to 4% of a wavelength of the acoustic surface wave at the oscillation; and a plasma CVD-deposited layer of silicon dioxide covering the electrodes and the substrate, the silicon dioxide layer having a refractive index of 1.445 to 1.486 and a thickness equal to 16 to 26% of the wavelength of the acoustic surface wave at the oscillation.

Abstract: A mass flow controller including a valve assembly wherein a flow rate-controlling portion of the valve assembly is mirror finished and wherein the maximum flow rate through the flow rate-controlling portion during the time that the flow rate is not being controlled is set so as to be sufficiently large in comparison with the flow rate during control whereby a moisture purging function may be performed without external fluid bypass circuits.

Abstract: A mass flow container wherein the resistive wires wound about the conduit of a flow meter portion are provided with a current in a direction such that the magnetic field produced by the current is opposite in direction to the flow of fluid through the conduit and wherein a flow rate-controlling portion includes a valve assembly that is mirror-finished.

Abstract: A sensor case housing a pair of sensor coils wound around a peripheral surface of a conduit, through which a fluid flows, therein is formed of two block members made of materials superior in heat conductivity, at least one of said block members being provided with a pair of support projections formed integrally with said block member adjacent to both ends of said sensor coils on an inner surface thereof, and said conduit being held by means of said support projections.

Abstract: A thermal recording head comprising an insulating substrate which has thereon a heat generating resistor pattern made of a thin-film resistor, an electrode pattern having a common power supply electrode pattern portion and a common grounded electrode pattern portion, for supplying the power to the resistor pattern, and a controlling electrode pattern portion, and switching elements for controlling the supply of the power to the resistor pattern. The electrode pattern is made of a thick-film copper paste by a printing process. The operation of the switching elements is controlled by the controlling electrode pattern portion.Also disclosed is a process for manufacturing a wiring substrate for a thermal recording head.

Abstract: Cracks in an Ta.sub.2 O.sub.5 anti-abrasion layer of a thermal printing head resulting from the crystallization of the Ta.sub.2 O.sub.5 in the layer, are suppressed by the addition of SiO.sub.2 to the layer. The anti-abrasion layer is provided as a uniform mixture of Ta.sub.2 O.sub.5 and SiO.sub.2 throughout the layer by sputtering a target composed of a mixture containing tantalum and silicon ingredients onto an antioxidation layer. The thermal printing head is also subjected to annealing to stabilize the resistivity of the heating elements.

Abstract: A tantalum film capacitor has an .alpha.-tantalum as a lower electrode, a chemical conversion layer of .alpha.-tantalum as a dielectric and an upper electrode, an improvement involving forming a highly nitrogen-doped tantalum film between the .alpha.-tantalum and a substrate, and also, another improvement involving forming a transitional thin tantalum layer between said highly nitrogen-doped tantalum film and said .alpha.-tantalum. The nitrogen concentration of the highly nitrogen-doped tantalum film is from 14 to 30 atomic %. The electrical properties, especially leakage current, are improved over those of the prior art. A disadvantage of the conventional .alpha.-tantalum thin film capacitor, that is the necessity of using an expensive partial glazed Al.sub.2 O.sub.3 substrate, is eliminated, and a non-glazed Al.sub.2 O.sub.3 substrate can be used in the present invention.