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 mask forming method forms an A mask forming functional layer with an amorphous structure so as to cover an etched body, forms a B mask forming functional layer so as to cover the formed A mask forming functional layer, forms a convex/concave pattern in the formed B mask forming functional layer by carrying out a predetermined process to form a B mask on the A mask forming functional layer, and forms an A mask on the etched body by forming a convex/concave pattern in the A mask forming functional layer by dry etching the A mask forming functional layer using the B mask. By doing so, a convex/concave pattern with extremely small pattern fluctuations can be formed in the A mask forming functional layer.
摘要:
A magnetic recording and reproducing device includes: a magnetic recording medium in which a magnetic recording layer is formed in a concavo-convex pattern so that tracks are formed by convex portions of a predetermined track width and arranged in parallel in the track width direction; a heating head for heating the magnetic recording medium to partially reduce coercivity of the tracks; a recording head for applying a recording magnetic field to a heated portion of the magnetic recording medium to record magnetic data on the tracks; and a reproducing head for detecting a reproducing magnetic field of the tracks. In this configuration, an effective recording area has an effective recording width that is equal to or more than the track width, and equal to or less than a sum of the track width and a doubled value of width of concave portions between the tracks.
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 magnetic recording medium is provided, which has a recording layer formed in a concavo-convex pattern and makes it possible to obtain the stable flying characteristics of a head. In the magnetic recording medium, concave portions between recording elements are filled with a non-magnetic material. Thus, the surface of the magnetic recording medium takes a concavo-convex shape which is different from the concavo-convex pattern of the recording layer. Also, the arithmetical mean deviation of the assessed profile of the concavo-convex shape in the surface is restricted to 1 nm or less.
摘要:
A compact ion gun capable of flattening both sides of a substrate, an ion beam etching apparatus provided with the ion gun, an ion beam etching facility, an etching method using them, and a method for manufacturing a magnetic recording medium are provided. The ion gun includes a plasma generation source and an extraction electrode unit. The extraction electrode unit has: a first electrode unit including a portion of a plurality of electrode plates on a first side of a reference plane intersecting the electrode plates, the portion being inclined with respect to the reference plane so as to face an irradiation target area along the reference plane; and a second electrode unit including a portion of the electrode plates on a second side of the reference plane, the portion being inclined with respect to the reference plane so as to face the irradiation target area along the reference plane.
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.
摘要:
A magnetic recording medium and a method of manufacturing the same which serve for stable head behavior and efficient recording of servo information. In each servo area, a magnetic layer is separated into a plurality of servo pattern unit parts for forming a predetermined servo pattern and a plurality of servo pattern gap filling parts patterned to fill gaps between the plurality of servo pattern unit parts partly. The servo pattern unit parts and the servo pattern gap filling parts are formed in different sizes so as to have different magnetic properties.