| 摘要 |
PURPOSE:To execute at a narrower pitch than the diameter of a beam, and to elevate the recording density per a unit area of a magnetic recording medium, by shortening a bit interval without changing the spot size of a light beam itself. CONSTITUTION:When a magnetic field by a coil 3 is N pole, an irradiated part of its light beam 1 is inverted to the N pole, and when the magnetic field by the coil 3 is S pole, the irradiated part of its light beam 1 is inverted to the S pole, and its magnetizing direction is maintained. In this case, when the light beam 1 or a feed speed of a substrate (magnetic medium 2) is made slow, a light beam spot inverted to the N pole or the S pole on the magnetic medium 2 is superposed in order, a heating shape of a trailing edge part of each light beam spot is left in order in the shape of a crescent, and recording is left. |
