Fuji Electric Co., Ltd.

Yoshiharu Kashiwakura

Youichi Tei

Masaki Miyazato

Kazuo Nimura

Keiji Ohkubo

Kiyoto Yamaguchi

Michio Osawa

Tetsu Ikegami

Yoshiaki Itoh

Yoshihumi Ajishi

Michinori Nishimura

Hiroshi Minazawa

Souta Matsuo

Hisashi Yamazaki

A magnetic recording medium has a non-magnetic ground layer, a non-magnetic recording layer, a protecting layer formed sequentially on a non-magnetic substrate, one on top of another. A double-layered non-magnetic ground layer consists of a pure chromium layer, positioned closer to a substrate, and a chromium-molybdenum-tungsten ternary alloy layer, positioned closer to a magnetic recording layer. This provides the non-magnetic recording layer formed on such a ground layer with cobalt alloy grains having uniform dimensions. The resulting magnetic recording medium has an excellent SNR.

Magnetic recording medium and manufacturing process thereof

A magnetic recording medium is provided that includes a non-magnetic base, a magnetic layer laminated on a non-magnetic base, a carbon protective layer containing hydrogen and laminated on the magnetic layer, and a lubrication layer formed by applying a liquid lubricant to the carbon protective layer. The carbon protective layer includes a surface layer containing nitrogen, and the composition ratios of nitrogen and hydrogen in the surface layer may be suitably controlled to optimum ranges.

Magnetic recording medium having a carbon protective layer and method

A magnetic recording medium and a method for the manufacture thereof are disclosed that are less likely to result in head crushing even if high-hardness slider materials are used, and which is formed with a carbon protective layer that has good anti-CSS characteristics. The carbon protective layer is formed using a sputtering gas mixed with methane at a greater amount than predetermined to form a carbon protective layer in which diamond bonds are present at a higher ratio than graphite bonds, and polymeric bonds are present to an adequate degree. A magnetic recording medium having such a carbon protective layer shows a very high durability in a CSS cycle test.

Magnetic recording medium having an enhanced diamond bonding ratio and a

A thin film magnetic head includes a magnetic core composed of upper and lower magnetic pole films spaced apart to define a read-write gap and a coil disposed between the upper and lower magnetic pole films in an area outside of the gap. The upper and lower magnetic pole films each comprise a thin-film laminate having alternating magnetic and non-magnetic thin films. The magnetic thin film includes an amorphous Co alloy having a soft magnetic property and a thickness within a range of 0.1 .mu.m to 0.5 .mu.m and the non-magnetic thin-film includes a non-magnetic metal or an insulating nitride.

Thin film magnetic head having a magnetic/non-magnetic laminate

Growing community of inventors

Nagano, Japan

Yoshiharu Kashiwakura