Hitachi, Ltd.

Kazuo Nate

Hideki Sonobe

Mikio Tokuyama

Takashi Inoue

Hitoshi Yokono

Teruyoshi Higashiya

Sadanori Nagaike

Eisei Togawa

Hiroshi Ishizaki

Akiko Mizushima

Tetsuji Higashijima

Shigeo Nakamura

Hirotaka Imayama

Yoshinori Takeuchi

Kenji Mori

Yasuo Hira

Mitsuo Nakatani

Shinsuke Higuchi

Kazufumi Azuma

Masayasu Fujisawa

Saburo Suzuki

Yoshiki Hagiwara

Hisashi Sugiyama

Atsuko Ohkawa

Tamaki Toba

Tokio Isogai

Toshio Kobayashi

Masahiro Tanaka

Jun Yamada

Takeshi Endo

Masaaki Okunaka

Akitsuna Yuhara

Yoji Maruyama

Harunobu Saito

Makoto Aihara

Tatsuro Toyama

Makoto Kumada

Keisuke Ebata

Kasufumi Azuma

Kyoko Kotsuka

Mitsuo Ishikawa

A magnetic head element has one or more rails formed on the surface thereof. Each rail is formed so as to have a tapered angle of 55-85&deg;. To form such a rail, ion milling is conducted; the rail substrate used is allowed to have an inclination angle to 15-60&deg; and is rotated; and there is used, as the ion milling gas, a fluorinated hydrocarbon (e.g., CH,FCF,) gas alone or a mixed gas of said fluorinated hydrocarbon gas and Ar, SF,or the like. Accordingly, a magnetic head rail shape gives a small variation in flying height between magnetic bead and magnetic disc.

Thin film magnetic head having non-linear tapered rails

A magnetic head slider assembly for a magnetic disk type recording/reproducing apparatus includes a slider body, a sliding pad provided on the slider body and projecting beyond a disk facing surface thereof, a thin film layer disposed at one end of the slider body, a magnetic head constituted by the thin film layer as an integral part thereof, and a core pad projection incorporating therein a core of the magnetic head and projecting beyond an adjacent disk facing surface of the slider body. The sliding pad is provided at a region of the slider body ahead of the core pad projection and prevents generation of a floating force by making use of a relative movement between the slider body and the magnetic disk. The core pad projection is not formed as a continuation of the slider body and is separated from the sliding pad a predetermined distance longitudinally of the slider body by a recess interposed therebetween whereby the core pad projection is positioned closer to the magnetic disk than a back end of the sliding pad.

Magnetic head slider assembly for magnetic disk recording/reproducing apparatus

Three pads are disposed on the surface of a magnetic head facing to a storage medium and are brought into contact with the surface of the storage medium through a lubricant layer. The total of areas of the three pads is equal to or larger than 0.0001 mm.sup.2 and equal to or smaller than 0.02 mm.sup.2 and the height of the pads is equal to or higher than 5 .mu.m and equal to or lower than 100 .mu.m. Two pads of the three pads include tapers formed in the front thereof and are disposed in a forward position in a relative movement direction to the storage medium and one remaining pad is disposed in a backward position. The total of areas of the two pads in the forward position is set to be narrower than an area of the pad in the backward position. A writing and reading function unit is provided in the pad in the backward position.

Magnetic storage apparatus having a head with sliding pads

Magnetic head slider assembly for magnetic disk recording/reproducing

A magnetic head element has one or more rails formed on the surface thereof. Each rail is formed so as to have a tapered angle of 55-85.degree.. To form such a rail, ion milling is conducted; the rail substrate used is allowed to have an inclination angle to 15-60.degree. and is rotated; and there is used, as the ion milling gas, a fluorinated hydrocarbon (e.g., CH.sub.2 FCF.sub.3) gas alone or a mixed gas of said fluorinated hydrocarbon gas and Ar, SF.sub.6 or the like. Accordingly, a magnetic head rail shape gives a small variation in flying height between magnetic head and magnetic disc.

Thin film magnetic head having non-linear rails

A magnetic head slider assembly for a magnetic disk type recording/reproducing apparatus includes a slider body, a floating pad provided on the slider body and projecting beyond a disk facing surface thereof, a thin film layer disposed at one end of the slider body, a magnetic head constituted by the thin film layer as an integral part thereof, and a core pad projection incorporating therein a core of the magnetic head and projecting beyond an adjacent disk facing surface of the slider body. The core pad projection is not formed as a continuation of the slider body and is separated from the floating pad a predetermined distance longitudinally of the slider body by a recess interposed therebetween whereby the core pad projection is positioned closer to the magnetic disk than a back end of the floating pad whereby influence of a process offset between the slider body and the magnetic head during fabrication process can be eliminated.

A magnetic head element has one or more rails formed on the surface thereof. Each rail is formed so as to have a tapered angle of 55.degree.-85.degree.. To form such a rail, ion milling is conducted; the rail substrate used is allowed to have an inclination angle to 15.degree.-60.degree. and is rotated; and there is used, as the ion milling gas, a fluorinated hydrocarbon (e.g. CH.sub.2 FCF.sub.3) gas alone or a mixed gas of said fluorinated hydrocarbon gas and Ar, SF.sub.6 or the like. Accordingly, a magnetic head rail shape gives a small variation in flying height between magnetic head and magnetic disc.

Thin film magnetic head, process for production thereof

A process for producing a magnetic head slider with at least one rail having an air bearing surface. The process includes the steps of disposing a non-metallic film on a work surface to be shaped of a magnetic head slider material so as to be in intimate contact with the work surface, patterning the non-metallic film disposed on the work surface into at least one predetermined rail shape, shaping the work surface of the magnetic head slider material utilizing the patterned non-metallic film as a mask, and stripping off the patterned non-metallic film utilized as a mask which remains on the work surface of the slider material so as to provide at least one shaped slider rail of the magnetic head slider.

Process for producing magnetic head slider

Disclosed herein is a photosensitive resin composition composed mainly of an alkali-soluble organometallic polymer and a photosensitive dissolution inhibitor. The composition is used as a positive type resist which can be developed with an alkali developing solution. The resist has high sensitivity, high resolution, and resistance to oxygen plasma.

Photosensitive resin composition having high resistance to oxygen

An .alpha.-diazoacetoacetic acid ester derived from cholic acid, deoxycholic acid, lithocholic acid or a derivative thereof is effective as a sensitizer in a photosensitive resin composition containing an alkali-soluble resin to form a resist for lithography using KrF excimer laser.

.alpha.-diazoacetoacetates and photosensitive resin compositions

There are provided an alkali-soluble siloxane polymer, an alkali-soluble silmethylene polymer, and an alkali-soluble polyorganosilsesquioxane polymer. They are useful as a photoresist for the fabrication of semiconductor devices. They are suitable for dry etching because of their superior resistance to oxygen plasmas.

Alkali-soluble siloxane polymer, silmethylene polymer, and

An organic thin film consisting essentially of an organic compound is formed on a substrate surface by vacuum vapor deposition by exposing the organic compound as a vapor source to a laser beam having an energy level corresponding to that of the chemical bond of the organic compound, thereby sputtering the organic compound onto a substrate surface in vacuum and forming the organic thin film thereon. When a light or radiation-sensitive organic compound is used as the vapor source, a light or radiation-sensitive resist film is formed. The thin film thus formed retains the original chemical structure of the vapor source, and has a good flatness. Resolvability of resist film is improved owing to the absence of pin holes and particulate matters. A resist film having a higher sensitivity and a better contrast is formed by heating the substrate during the vapor deposition.

Process for forming an organic thin film

A photo and radiation sensitive-organopolymeric material having at least one Si--Si).sub.n bond, wherein n is an integer of from 1 to 5 has a good resistance to dry etching, a good adhesion and a good heat resistance and is useful for finer patterning with a good resolution.

Photo and radiation-sensitive organopolymeric material

A photosensitive resin composition comprising (a) 10 to 90 parts by weight of at least one polymerizable monomer of the formula: ##STR1## (R is defined in the specification), (b) 90 to 10 parts by weight of at least one compound selected from the group consisting of epoxy-acrylate resins, 1,2-polybutadiene resins, polyester resins and organopolysiloxanes, all having one or more acryloyloxy or methacryloyloxy groups in their molecular end or ends, and (c) 0.05 to 5 parts by weight of a photosensitizer based on 100 parts by weight of the sum of the components (a) and (b) shows slight shrinkage and the resulting coating film is good in adhesive properties and mechanical strength.

Photosensitive resin composition

An elastic surface wave device that has good frequency characteristics and no unwanted signals, and is highly suited for mass production, comprising a piezoelectric substrate, at least one pair of transmitting and receiving electrodes on the surface of said substrate, and elastic surface wave absorbers formed by curing a composition, the main component of which is a resin curable by ultraviolet radiation, disposed on at least part of the zone on said piezoelectric substrate that propagates unwanted elastic surface waves.

Elastic surface wave absorbers comprising ultraviolet light curable resin

Growing community of inventors

Machida, Japan

Kazuo Nate