Kabushiki Kaisha Toshiba

Other

Toshiba Memory Corporation

Takeshi Okino

Koji Asakawa

Naomi Shida

Toru Ushirogouchi

Satoshi Saito

Makoto Nakase

Yoshiyuki Kamata

Naoko Kihara

Masatoshi Sakurai

Ryosuke Yamamoto

Tomoyuki Maeda

Yoshihiko Nakano

Yasuaki Ootera

Shinobu Sugimura

Yoshiaki Kawamonzen

Seiji Morita

Akira Kikitsu

Akira Fujimoto

Takuya Shimada

Tsutomu Nakanishi

Akiko Yuzawa

Shuji Hayase

Hiroyuki Hieda

Norikatsu Sasao

Hiroaki Nakamura

Satoshi Shirotori

Satoshi Mikoshiba

Akira Watanabe

Makoto Asakura

Keizo Inoue

Shuzi Hayase

Yoichiro Tanaka

Rumiko Hayase

Yoshinori Funaki

Kiyoharu Tsutsumi

Katsuya Sugawara

Takuya Naito

Sawako Fujioka

Rikako Kani

Masahiro Kanamaru

Akira Takaragi

Mao Ito

A pattern formation method according to an embodiment includes providing a substrate in which protrusions each having a tapered shape are provided on a main surface. The method further includes supplying the main surface with spherical particles equal in diameter to make the spherical particles arrange in a triangular lattice form such that each of the protrusions is at least partially positioned within a region surrounded by the main surface and three of the spherical particles adjacent to one another.

Self-organization material and pattern formation method

A stamper of an embodiment includes: a base portion having a main surface; and a plurality of guides arranged on the main surface in mutually different first and second directions and serving as references of arrangement of a plurality of self-assembled dots. A distance between the guides in a third direction is within a range of an integer m&#xb1;0.05 times of a pitch of the plural self-assembled dots. The third direction corresponds to a third vector obtained by combining a first vector corresponding to the arrangement of the guides in the first direction and a second vector corresponding to the arrangement of the guides in the second direction. A distance between the plural guides in the first direction falls out of a range of an integer m&#xb1;0.15 times of the pitch of the plural self-assembled dots.

Stamper and method of manufacturing bit patterned medium using stamper

In one embodiment, a method of manufacturing a mold includes: forming a first layer having an affinity to a second polymer on a substrate having an affinity to a first polymer; forming first and second openings in the first layer; filling a resist in the second openings and hardening the resist to obtain a hardened resist; and forming a second layer containing a block copolymer and causing it to self-assemble.

Method of manufacturing mold

A pattern forming method according to an embodiment includes: forming a pattern film on a first substrate, the pattern film having a concave-convex pattern, the pattern film being made of a material containing a first to-be-imprinted agent; forming a material film on a second substrate, the material film containing a second to-be-imprinted agent having a higher etching rate than an etching rate of the first to-be-imprinted agent; transferring the concave-convex pattern of the pattern film onto the material film by applying pressure between the first substrate and the second substrate, with the pattern film being positioned to face the material film, and by curing the second to-be-imprinted agent; detaching the first substrate from the pattern film; and removing the material film by etching, to leave the pattern film on the second substrate.

Pattern forming method

A magnetic disk according to an embodiment includes: a plurality of data regions each including a plurality of tracks, each of the tracks being arranged to extend in a circumferential direction; a servo region provided between the data regions, the servo region extending in a radial direction, the servo region including: a plurality of guide patterns each extending in the radial direction; and at least one line of dots arranged by post patterns in the radial direction at least on a side of one of adjacent guide patterns, the post patterns being arranged in the radial direction between the adjacent guide patterns.

Magnetic disk and magnetic recording/reproducing apparatus

The present invention provides such a formation method that an antireflection structure having excellent antireflection functions can be formed in a large area and at small cost. Further, the present invention also provides an antireflection structure formed by that method. In the formation method, a base layer and particles placed thereon are subjected to an etching process. The particles on the base layer serve as an etching mask in the process, and hence they are more durable against etching than the base layer. The etching rate ratio of the base layer to the particles is more than 1 but not more than 5. The etching process is stopped before the particles disappear. It is also possible to produce an antireflection structure by nanoimprinting method employing a stamper. The stamper is formed by use of a master plate produced according to the above formation method.

Antireflection structure formation method and antireflection structure

A stamper according to an embodiment includes a guide including: a first portion provided in regions to be boundaries between the servo region and the data regions in the bit-patterned medium, the first portion extending in a radial direction; and a second portion connected to the first portion, the second portion having protrusions regularly arranged at predetermined intervals in the radial direction, each of the protrusion having and being located on sides of regions to be the data regions, wherein, of angles formed between at least one of two sides of the triangular shape and a straight line extending in the radial direction, the smaller angle is in the range of 10 to 50 degrees, the two sides extending from a vertex of one of the protrusions.

Stampers and magnetic disks

A magnetic recording apparatus has a magnetic recording media including a substrate and a magnetic layer containing magnetic patterns on the substrate, the magnetic layer including data zones to constitute recoding tracks and servo zones, the magnetic patterns of the servo zones being used as address bits, and a magnetic head configured to read signals from the magnetic recording media while flying over the magnetic recording media, in which, in a case where two magnetic patterns used as address bits on the servo zones corresponding to two adjacent recording tracks are arranged in such a manner that one corner of one magnetic pattern is closest to one corner of the other magnetic pattern, the corners of the two magnetic patterns are substantially separated from each other.

Magnetic recording apparatus

It is made possible to fabricate a bit-patterned magnetic recording medium having a high recording density and making favorable address deciphering possible. An original disk fabrication method for irradiating a photosensitive resin film with an electron beam to draw a pattern, the method includes: irradiating the electron beam by using a plurality of blanking signals every rotation of a stage per bit unit, when drawing the pattern in a part corresponding to an address part on a photosensitive resin film.

Original disk fabrication method, magnetic recording medium manufacturing method and magnetic recording medium

A magnetic disc medium according to an aspect of the present invention includes: a preamble part in a servo area of each of sectors obtained by dividing a surface of the medium in a circumference direction, the preamble part including strip-shaped patterns formed of a plurality of magnetic materials, and each of the strip-shaped patterns formed of the magnetic materials being divided by non-magnetic materials at periodic intervals.

Magnetic disk medium, reticle and magnetic recording and reproducing apparatus

A magnetic recording layer is formed on a surface of a substrate in magnetic recording media to define magnetic recording regions. Magnetic missing portions are provided in the magnetic recording regions, information cannot be magnetically recorded in the magnetic missing portions. The present invention provides magnetic recording media that enables authentication.

Recording media, recording and reproducing apparatus, and method for recording and reproducing

A magnetic recording media includes a servo region including a preamble region and a burst region and having marks of a magnetic film, and a data region having discrete tracks of the magnetic film. The burst region includes a signal section and a non-signal section, the signal section including rectangular marks of the magnetic film, in-plane geometry of which is a rectangle, formed in a periodic pattern in a track direction, and the non-signal section including marks of the magnetic film having a pattern different from the pattern of the rectangular marks in the signal section.

Magnetic recording media, method of manufacturing the same and magnetic recording apparatus

A magnetic recording media has a magnetic layer formed on a substrate and includes data regions including a magnetic pattern constituting a recoding track and servo regions including magnetic patterns used as address bits, the data regions and the servo regions being contained in a plane of the magnetic layer. In a case where two magnetic patterns used as address bits on the servo regions corresponding to two adjacent recording tracks are arranged in such a manner that one corner of one of the magnetic patterns is closest to one corner of the other, the corners of the two magnetic patterns are substantially joined together.

Magnetic recording media, magnetic recording apparatus, and stamper

According to the present invention, a resist resin having in its structure a specific bridged-bond-containing aliphatic ring, and a resist composition comprising the same are provided. By using this resist composition, a resist pattern excellent in both transparency against short-wavelength light and dry-etching resistance can be formed by alkali development with high resolution.

Process for producing a semiconductor device

Growing community of inventors

Yokohama, Japan

Takeshi Okino