Naoki Kodama has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
Abstract: The vehicular door lock device includes a casing fixed to a door and having a bulged portion defining an ingress passage receiving a striker on a vehicle body. A latch is supported on the casing for engagement with the striker for turning movement. A ratchet on the casing is for engagement and disengagement with and from the latch. An open lever is turnable on the casing and receives an operating force for releasing a locking state having the ratchet engaged with the latch. An internal operating-force inputting device transmits to the open lever a door opening operation force depending on the door opening operation within the vehicle. A locked-state switch-over device has an open link connected at one end to the open lever and switches over to an unlocked state to operate the ratchet from the engaged position to the disengaged position in response to the open lever turning, and a locked state inhibiting the ratchet from going to the disengaged position, irrespective of the turning movement of the open lever.
Abstract: In a magnetic recording system including magnetic recording media, a rotation driving unit for driving these magnetic recording media, read/write magnetic heads, driving apparatus for driving these read/write magnetic heads, and a read/write signal processing apparatus, a reading portion of the respective magnetic heads is arranged by a magnetoresistive head. The magnetic recording media are constructed of multi-layered magnetic media having a plurality of magnetic layers fabricated directly, or via underlayers on a non-magnetic disk substrate, and of non-magnetic intermediate layers arranged among these non-magnetic layers.
Abstract: A magnetic recording medium and magnetic recording apparatus which can provide a high output level and a low noise level are disclosed. A magnetic recording medium includes a multilayer structure of magnetic alloy thin films containing Co, and at least one paramagnetic intermediate region or oxygen-rich region disposed between the magnetic layers. The intermediate region reduces the magnetic interaction between the magnetic layers without the degradation of crystallinity of the magnetic layers. As a result, a magnetic recording medium having such a structure shows low noise performance and a high recording density.
Abstract: A longitudinal magnetic recording medium with a good overwrite property and a small medium noise is identified by a CRP value, which is defined byCRP=[H.sub.c (R).times.H.sub.c (P)]/[H.sub.c (C)].sup.2where H.sub.c (C) is a coercive force in the recording direction, H.sub.c (R) is a coercive force in the medium plane in a direction perpendicular to the recording direction, and H.sub.c (P) is a coercive force in the direction of medium thickness. The magnetic recording medium can be a disk with a magnetic recording layer formed by physical vapor deposition or spin coating.
Abstract: A coating type, magnetic disk is produced by applying a magnetic paint containing magnetic powders in a dispersed state to a non-magnetic substrate, thereby forming a magnetic recording film thereon, and applying surface waves to the magnetic recording film in an undried state. By applying the surface waves to the magnetic recording film, dispersibility and orientation of the magnetic powders are improved and a longitudinally oriented, coating type magnetic disk with distinguished electromagnetic properties, such as a high S/N ratio, etc. can be obtained.
Abstract: A method for manufacturing a magnetic paint by mixing a resin composition powder as a dispersing binder for a magnetic powder with the magnetic powder, or together with a filler, and grinding the mixture under a high shear stress is disclosed. A magnetic recording medium such as a magnetic disk, etc., prepared by using the magnetic paint, can have a magnetic coating film having a substantially uniform film thickness of not more than 0.9 .mu.m and a surface roughness of not more than 0.05 .mu.m Ra before surface finishing.
Abstract: A method for magnetic orientation of a magnetic recording medium using Meissner effect of a superconductor and a system therefor and a magnetic recording medium produced thereby. The magnetic particles of plate hexagonal barium ferrite in the magnetic coating are allowed to orient in the longitudinal direction thereof so that a magnetic recording medium having a magnetic orientation in such direction with the magnetic particles can be obtained.
Abstract: The invention provides a very efficient and reliable method for electrically connecting the electrodes of an electronic device, e.g., IC chips, and the electrodes of, for example, a glass-made circuit board substrate with good repairability. Thus, the electrodes of the IC chip are each first coated with an electroconductive thermally meltable adhesive resinous composition to form a resinous bump, the IC chip is mounted on the substrate with the adhesive-coated electrodes contacting with the respective electrodes of the substrate, and remelting and then solidifying the resinous bumps so that the electrodes are bonded and electrically connected together. As compared with the conventional methods in which an electroconductive thermosetting resinous composition is used for the bumps on the electrodes, the electrical connection can be obtained with a smaller thermal effect and good replaceability of the IC chip found unacceptable with an acceptable one.
Abstract: In a magnetic bubble memory device in which a major line and minor loops are constituted by ion-implanted tracks, a gate is constituted having two functions, i.e., having a replicate function and a pseudo swap function using conductor patterns of two layers that overlap on both the major line and on the minor loops. By controlling the pulsed current supplied to the conductor patterns of the two layers, the replicate function divides the bubble in the minor loop into two bubbles, so that one of the bubbles is taken onto the major line and is propagated to the detector. The pseudo swap function annihilates the bubble in the minor loop, divides the bubble on the major line into two bubbles and introduces one of them into the minor loop, thereby to realize the same function as that of the conventional swap gate.
Abstract: In a magnetic bubble memory device employing ion-implanted tracks as minor loops for data storage, there is proposed a magnetic bubble memory element employing a minor loop having a folded structure and a turn composed of three tips formed convexly toward an ion-implanted area and two cusps as an inside turn for accomplishing the folding with a center as the ion-implanted area. In this inside turn, the line connecting between the two cusps of the turn includes a gradient in the range of 90 degrees to 120 degrees in relation to the ion-implanted straight line tracks.
Abstract: A hybrid magnetic bubble memory device comprising soft magnetic material propagation tracks and ion-implanted propagation tracks. In the soft magnetic material propagation track region, a layer made of a heat-resistant polymer was provided as an interlaminar insulating layer between a conductor and a pattern of a soft magnetic material. An insulator film made of a heat-resistant polymer was provided on the pattern made of a soft magnetic material. A passivation film made of an inorganic material was provided on the ion-implanted propagation tracks and the insulator film made of a heat-resistant polymer.
Abstract: A magnetic bubble memory device comprises contiguous-disk ion-implanted magnetic bubble propagation tracks formed by implanting selectively ions in a magnetic layer which can hold magnetic bubbles. At least one of the disks which form the ion-implanted bubble tracks and each of which may have a circular or square shape, is configured to include a combination of arcs of circles having different curvatures or a combination of sides of squares having different sizes.
Abstract: A hybrid magnetic bubble memory device includes, magnetic bubble propagation tracks formed of partial ion-implantation and bubble propagation tracks formed of a soft magnetic material pattern. At least one of the junctions between the two type tracks is located on a corner soft magnetic material pattern where the bubble propagation direction is changed, and the hairpin conductor is superposed on the part of the corner pattern under which the magnetic material is not ion-implanted to form ion-implanted propagation tracks.
Abstract: A highly density magnetic bubble memory device has bubble propagation paths having different pattern periods. The distance between a propagation path having shorter period and a magnetic film for holding magnetic bubbles is made smaller than that between propagation path having longer period and the magnetic film. An insulating layer formed between the propagation path and the magnetic film through another insulating layer has a declining slope having an angle of 60.degree. or less, thereby ensuring steady propagation of the magnetic bubbles along the propagation path.
Abstract: Disclosed is a magnetic bubble memory device having a first bubble propagation path formed in an ion-implantation pattern and a second bubble propagation path made of permalloy elments in combination. The majority of the area for forming the second propagation path is processed by ion implantation in lower density and to smaller depth than those of ion implantation for forming the first propagation path on the surface of a bubble supporting layer.
Abstract: A magnetic bubble stretcher comprises a bubble fanning part for propagating a magnetic bubble while gradually stretching the bubble and a bubble propagation part for propagating the stretcher bubble. The bubble fanning and propagation parts include a bubble propagation patterns as fundament elements for stretching or propagating the bubble the bubble propagation patterns in the bubble fanning part are different in shape and/or dimension from the bubble propagation patterns in the bubble propagation part.
Abstract: A magnetic bubble device includes ion-implanted bubble propagation tracks of meandering cord-like configuration to assure improved bubble propagation characteristic. Amplitude of a region in which inplane magnetization layer is absent or alternatively thickness thereof is smaller than that of other region, as measured in the direction perpendicular to the bubble propagating direction, is not greater than 7/8 of a pitch of the meandering pattern in the bubble propagating direction. The amplitude is more preferably selected so as to meet the condition that 1/4.ltoreq.W/P.ltoreq.3/4 for assuring much stabilized bubble propagating operation.
Abstract: A magnetic bubble memory device has two types of magnetic bubble propagation tracks. One type of magnetic bubble propagation tracks are formed by implanting ions into a magnetic layer. The other are formed by a soft magnetic material, for example, a permalloy. At least the area where the soft magnetic material is located has a smaller thickness than the other area.
Abstract: A magnetic bubble memory device is disclosed which is equipped with a minor loop of a magnetic bubble propagation track formed by ion implantation and a major loop or major line of a magnetic bubble propagation track consisting of a soft magnetic film and in which the thickness of an insulating film at at least the junction between the minor loop and the major loop or major line is less than the thickness of insulating film at the major line or major loop.
Abstract: In a magnetic bubble replicator having a soft magnetic material element for propagating a magnetic bubble along an edge thereof in response to a change in a direction of an external magnetic field and a hairpin-shaped conductor superimposed on the soft magnetic material element, an angle between a slit of the conductor and a propagation path of the magnetic bubble of the soft magnetic material element is set to no less than 90 degrees, preferably 5-85 degrees, and more preferably to 45-60 degrees.