Nihon Shinku Gijutsu Kabushiki Kaisha

Taiki Yamada

Kyuzo Nakamura

Yoshifumi Ota

Noriaki Tani

Michio Ishikawa

Yasushi Higuchi

Akio Ito

Yoshifumi Ohta

An improved magnetic recording member comprising a magnetic metallic film having the composition Co.sub.x Cr.sub.y Ni.sub.z wherein x, y, and z are atomic ratios and 0.45.ltoreq.x&lt;1.0; 0&lt;y.ltoreq.0.25; and x+y+z=1. The magnetic metallic film is formed over a Cr film provided on a surface of a non-magnetic substrate.

Magnetic recording member

A perpendicular type magnetic recording member comprising a perpendicular-incidence magnetic film on a substrate, the perpendicular-incidence magnetic film comprising a magnetic metal and oxygen, the magnetic metal being selected from the group consisting of ferro-magnetic alloys, alloys thereof and combinations thereof; and a method of manufacturing the perpendicular type recording member by utilizing vapor deposition techniques, which may include sputtering and ionization.

Method of manufacturing perpendicular type magnetic recording member

A Co-based alloy sputter target comprising a f.c.c. phase and a h.c.p. phase, wherein the value of th ratio of X-ray diffraction peak intensity, I.sub.fcc(200) /I.sub.hcp(101), is smaller than the value of the same ratio in a Co-based alloy obtained by cooling a Co-based alloy having a f.c.c. single phase to room temperature from the high temperature at which it is in a melted state. The target is manufactured by subjecting to cold-working treatment a Co-based alloy obtained by cooling a Co-based alloy material having a f.c.c. single phase from its melting temperature.

Co-based alloy sputter target and process of manufacturing the same

An abrasion resistant magnetic recording member having a carbonaceous surfacial protective film for protecting a surface of a magnetic film formed on a substrate, and the carbonaceous surfacial protective film is formed of a lower layer comprising a comparatively hard carbonaceous film and an upper layer comprising a comparatively soft carbonaceous film.

Abrasion resistant magnetic recording member

A ferromagnetic, high speed, sputtering apparatus is provided which comprises a vacuum chamber and a target of ferromagnetic material. The target comprises at least two segments which are positioned adjacent to one another and have a gap therebetween. This gap has at least a portion of which that does not extend in the direction of the thickness of the target. A substrate in the vacuum chamber is positioned facing one side of the target. Also, magnetic field generating means is positioned on the other side of the target so that the magnetic field therefrom leaks through the gap.

Ferromagnetic high speed sputtering apparatus

A ferromagnetic, high-speed sputtering apparatus including an evacuable chamber, a substrate in the chamber, a target of ferromagnetic substance in the chamber facing the substrate, and magnetic field developing means in the chamber on the side of the target opposite the substrate. The target serves as a cathode. The target includes at least two separate segments of ferromagnetic substance which are spaced apart one from another by a gap so that a leakage magnetic field may be produced on the surface of the target facing the substrate. The gap may be less than about 3 mm. Each of the segments can include a ridge portion on the surface facing the substrate. Each ridge portion can have at least one apex and at least one slant surface.

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Yachimata, Japan

Taiki Yamada