Abstract: A magnetic transfer apparatus for magnetically transferring information represented by a pattern of a magnetic layer formed on a master information carrier to a slave medium includes a magnet unit which applies an initial DC magnetic field to a slave medium and a magnet unit which applies a transfer magnetic field to the slave medium and the master information carrier in the direction opposite to the direction of the initial-magnetization with the slave medium held in close contact with the master information carrier. The initial DC magnetic field and the transfer magnetic field are not larger than the diameter of an innermost recording track in the half-width of a curve representing an intensity distribution in the direction of a tangent of the innermost recording track.

Abstract: A master information carrier for magnetic transfer to an in-plane magnetic recording medium includes a base sheet having an irregularity pattern representing information to be transferred to an in-plane magnetic recording medium and a magnetic layer formed along the irregularity pattern. The thickness da1 of the magnetic layer on the upper surface of a protruding portion of the irregularity pattern and the thickness da2 of the magnetic layer on each of the side surfaces of the protruding portion satisfy the following condition, 0.05<da2/da1?1.3.

Abstract: A master information carrier for magnetic transfer has a concentric irregularity pattern representing information to be transferred to a disc-like magnetic recording medium. The top surface of the protruding portions of the irregularity pattern is formed of magnetic material. The irregularity pattern is formed so that the width L [nm] in a circumferential direction of a protruding portion at a distance R [nm] from the center satisfies the condition L=&agr;(&ohgr;·&Dgr;T·R), 0.8≦&agr;≦1.4, wherein &ohgr; represents in [rad/sec] the angular velocity of the magnetic recording medium when a signal is read out from the magnetic recording medium after the magnetic transfer and &Dgr;T represents in [sec] a desired signal time width of a reproduction signal waveform in a magnetization transition region corresponding to an interval between the ends of the protruding portion in the circumferential direction.

Abstract: A master information carrier for magnetic transfer to an in-plane magnetic recording medium includes a base sheet having an irregularity pattern representing information to be transferred to an in-plane magnetic recording medium and a magnetic layer formed along the irregularity pattern. The thickness da1 of the magnetic layer on the upper surface of a protruding portion of the irregularity pattern and the thickness da2 of the magnetic layer on each of the side surfaces of the protruding portion satisfy the following condition, 0.05<da2/da1≦1.3.

Abstract: A master information carrier has a pattern of a magnetic layer representing information to be transferred to a high-density recording slave medium where the track width is not larger than 0.3 &mgr;m. The pattern is drawn by scanning a given track a plurality of times with an electron beam whose drawing diameter is smaller than the track width.

Abstract: An electron beam lithography method for performing lithography of elements included in a pattern by scanning a disk having resist coated thereon, placed on a rotating stage which is movable in a radial direction of the disk, with an electron beam while rotating the rotating stage. The electron beam has a beam diameter smaller than a minimum width of an element shape. The electron beam is reciprocally oscillated in a circumferential direction X approximately orthogonal to a radial direction Y of the disk and deflected in the radial direction Y, thereby filling in the element shape. Lithography of the elements is sequentially performed by rotating the disk unidirectionally, and thus a desired micropattern is drawn in the entire region of the disk. A lithographic length L of the element in the circumferential direction X may be defined by amplitude of the reciprocal oscillation of the electron beam.

Abstract: A desired pattern of elements, including an element having a slant side intersecting a recording track, is depicted on a resist layer on a disc-like substrate. The element is depicted by causing an electron beam whose beam diameter is smaller than the minimum width of the element to scan the resist layer so that the trajectory of the beam center of the electron beam on the resist layer draws a periodic waveform traveling along an axis parallel to the recording track. The periodic waveform is drawn from a starting point which is on a valley or a peak of the waveform. Angles &thgr;3, &thgr;1 and &thgr;2 satisfy the relation &thgr;1<&thgr;3<&thgr;2.

Abstract: A resist layer formed on a disc-like substrate is exposed to an electron beam in a desired pattern to depict a desired pattern on the resist layer. The desired pattern is depicted by oscillating back and forth, in directions intersecting the circumferential direction of the disc-like substrate, an electron beam smaller in its beam diameter than the minimum width of the pattern while rotating the substrate in one direction.

Abstract: A magnetic transfer apparatus for magnetically transferring information represented by a pattern of a magnetic layer formed on a master information carrier to a slave medium includes a magnet unit which applies an initial DC magnetic field to a slave medium and a magnet unit which applies a transfer magnetic field to the slave medium and the master information carrier in the direction opposite to the direction of the initial-magnetization with the slave medium held in close contact with the master information carrier. The initial DC magnetic field and the transfer magnetic field are not larger than the diameter of an innermost recording track in the half-width of a curve representing an intensity distribution in the direction of a tangent of the innermost recording track.

Abstract: A master information carrier for magnetic transfer has a concentric irregularity pattern representing information to be transferred to a disc-like magnetic recording medium. The top surface of the protruding portions of the irregularity pattern is formed of magnetic material.

Abstract: On an original of a master information carrier, a phase servo pattern is drawn by scanning the original with an electron beam. The phase servo pattern is drawn element by element by causing the electron beam having a beam diameter not larger than the minimum width of the element to scan a disc-like substrate of the original, which has been provided with a resist layer for electron beam drawing, in a diametrical direction of the disc-like substrate while rotating the substrate in one direction at a constant speed.

Abstract: A master information carrier for magnetic transfer includes a base sheet which is formed of a magnetic material. The master information carrier is provided with an irregularity pattern representing information to be transferred to a magnetic recording medium and a magnetic layer formed along the irregularity pattern.

Abstract: A master information carrier for magnetic transfer to an in-plane magnetic recording medium includes a base sheet having an irregularity pattern representing information to be transferred to an in-plane magnetic recording medium and a magnetic layer formed along the irregularity pattern.

Abstract: To improve the quality of transfer signal by reducing loss of azimuth when the magnetic transfer is performed by bringing a master carrier and a slave medium into close contact with each other and applying transfer magnetic field thereto, even if the width of track is narrowed.