摘要:
A nuclear reactor comprises a fuel rod into which nuclear fuel is enclosed and a control rod that controls nuclear reactions of the nuclear fuel. A concentration of a neutron absorber in a primary coolant at a full power operation of the nuclear reactor, when an operation of the nuclear reactor is started, is set equal to or lower than a value that is obtained by adding a predetermined value to a value obtained by subtracting a concentration of the neutron absorber that is required for maintaining a cold shutdown state of the nuclear reactor when an operation of the nuclear reactor is started from a concentration of the neutron absorber that is required for maintaining cold shutdown of the nuclear reactor when an operation of the nuclear reactor is completed.
摘要:
The magnetic recording medium includes: recording elements formed as the convex portions of the recording layer formed in the predetermined concavo-convex pattern over a substrate; and a filling elements with which a concave portions between the recording elements are filled. A surface concave portion is formed in a surface of the magnetic recording medium above the recording element. The surface concave portion has a cross-sectional shape of which a portion corresponding to a center of the recording element lying thereunder in a width direction thereof is recessed deepest toward the substrate, and has a width monotonically increasing with increase of a distance from the substrate.
摘要:
A highly reliable magnetic recording medium is provided which has a recording layer formed in a concavo-convex pattern and wherein the recording layer is unlikely to cause a change in magnetic properties. The magnetic recording medium includes a substrate, a recording layer formed in a predetermined concavo-convex pattern over the substrate, convex portions of the concavo-convex pattern serving as recording elements; and a filler portion filling a concave portion between the recording elements. The filler portion comprises a metal-based main filler material and oxygen. Oxygen is unevenly distributed in the filler portion so that the ratio of the number of oxygen atoms to the total of the number of atoms of the main filler material and the number of oxygen atoms is greater in an upper surface portion of the filler portion than in a lower portion of the filler portion.
摘要:
On a rotary-type magnetic recording medium, servo patterns are formed in servo pattern regions on one surface and the other surface of a disk-shaped substrate by patterns including recording regions and non-recording regions. In the servo pattern regions on both the one surface and the other surface, plural functional regions are defined in order in a direction of rotation of the magnetic recording medium. In the pattern formed in at least one region out of the plural functional regions on the one surface, the non-recording regions are formed at formation positions on the one surface corresponding to formation positions of the recording regions on the other surface and the recording regions are formed at formation positions on the one surface corresponding to formation positions of the non-recording regions on the other surface.
摘要:
The present invention may provide a lens barrel which may include a guide shaft, and a movable lens frame. The barrel may be with an image capturing optical system disposed therein. The guide shaft may be disposed in the barrel and may extend parallel to the optical axis of the image capturing optical system. The movable lens frame may be reciprocally movable along the guide shaft in the barrel and holding lenses of the image capturing optical system. The barrel may include a wall supporting the guide shaft. The wall may include a light shield member projecting therefrom along the guide shaft in covering relation to a surface of the guide shaft which faces the optical axis.
摘要:
A filling material different from a first mask layer (temporary coating material) is deposited over a workpiece to fill concave portions. At least part of excess portions of the filling material is removed by a dry etching method such that at least part of the side surfaces of the first mask layer over recording elements are exposed. Then, the first mask layer is removed by a dry etching method which uses a reactive gas having the property of chemically reacting with and removing both the filling material and the first mask layer as a processing gas and in which an etching rate for the first mask layer is higher than that for the filling material, and the etching rate for the filling material is higher than that for a recording layer (a lower layer that is in contact with a lower surface of the first mask layer over recording elements).
摘要:
A reliable magnetic recording medium manufacturing method is provided in which a resin material used for processing a recording layer into a concavo-convex pattern can be removed reliably. In the magnetic recording medium manufacturing method, an energy ray curable resin material is spread over a continuous recording layer. Then, a stamper having a predetermined concavo-convex pattern is brought into contact with the resin material to transfer the concavo-convex pattern to the resin material, and the resin material is irradiated with energy rays such that the irradiation energy on a portion excluding the edge portion of the resin material is greater than that on the edge portions. The curing reaction proceeds to a greater extent in the portion excluding the edge portions than in the edge portions. Then, the resin material is etched and removed such that more resin material is removed from the edge portions than from the other portion.
摘要:
A lens barrel includes a lens moving frame configured to hold an image pickup lens; a barrel member configured to support the lens moving frame for back and forth linear movement along the direction of an optical axis of the image pickup lens; the lens moving frame having a magnetized face magnetized alternately with N poles and S poles along the direction of the back and forth linear movement; and, a magnetic resistance sensor apparatus. The magnetic resistance sensor apparatus has a magnetic resistance sensor, a body, a single screw, and a plurality of resilient pieces. The resilient pieces are formed such that, in a state wherein the resilient pieces are resiliently deformed all by the same amount, the sum of moments by the resilient pieces which act upon the location of the body at which the screw is fitted is zero.
摘要:
A lens barrel includes a lens moving frame configured to hold an image pickup lens; a barrel member configured to support the lens moving frame for back and forth linear movement along the direction of an optical axis of the image pickup lens; the lens moving frame having a magnetized face magnetized alternately with N poles and S poles along the direction of the back and forth linear movement; and a magnetic resistance sensor apparatus. The magnetic resistance sensor apparatus has a magnetic resistance sensor, a body, a single screw, and a plurality of resilient pieces. The resilient pieces is formed such that, in a state wherein the resilient pieces are resiliently deformed all by the same amount, the sum of moments by the resilient pieces which act upon the location of the body at which the screw is fitted is zero.
摘要:
A pattern drawing method capable of drawing a pattern such that opposite ends of a formation region on an inner periphery side and an outer periphery side are substantially linearly formed. A drawing beam is intermittently irradiated N times onto a generally belt-shaped exposure area extending in a direction of rotation of the substrate from one end to the other end of the belt-shaped exposure area in the direction of rotation of the substrate, the belt-shaped exposure area being defined within a formation region, in which one of the convex or concave portions is to be formed, to thereby irradiate the drawing beam onto N generally belt-shaped irradiation areas extending in the direction of rotation of the substrate.