Abstract: The present invention provides a master disk for magnetic transfer which has a disk-like outer shape and in the surface of which a large number of fine magnetic layer patterns are formed, wherein the relationship between the outside diameter size d (mm) of the extreme outer circumference of the magnetic layer pattern and the master disk thickness t (mm) is given by 2.04×10?3×d+0.006?t?8.15×10?3×d+0.024, in order to exclude the effects of bows, strains and thickness deviations of a master disk in performing magnetic transfer and ensure that accurate transfer of magnetization patterns can be performed.

Abstract: A magnetic-transfer method comprising the steps of: initially DC-magnetizing a transfer-recipient disc in a circumferential direction, by applying a magnetic field to the transfer-recipient disc in the circumferential direction thereof; bringing initially DC-magnetized transfer-recipient disc and a master disc into close contact with each other, on the top side of the master disc a magnetic layer including a great number of protrusions that configure a magnetic pattern being formed, ratio t/b of thickness t of the magnetic layer to circumferential length b of the protrusion being from 0.5 to 4.

Abstract: An apparatus and a method of producing a high density fiber reinforced composite material operate for lowering the porosity of a porous fiber reinforced composite material. A large number of particles arranged in a reaction tube are pushed up by the pressure of gases flowing from a gas inlet port toward a gas outlet port to enter floating states and to collide with the porous fiber reinforced composite material which is fixed in the reaction tube. In this state, matricies are formed in pores of the porous fiber reinforced composite material through chemical vapor infiltration. The large number of floating particles prevent an adhesion between the surface of the porous fiber reinforced composite material and blocking with soot, while preventing the pores from blocking with soot.