Hitachi, Ltd.

Hitachi Media Electronics Co., Ltd.

Akiko Mizushima

Kazuo Nate

Hisashi Sugiyama

Takashi Inoue

Hiroaki Furuichi

Hidenao Saito

Jun Hato

Eisei Togawa

Kazuhiko Ito

Harunobu Saito

Kazumi Takahashi

Ryuichiro Mizuno

Hiroshi Ishizaki

Hideki Sonobe

Masayuki Okamura

Kasufumi Azuma

Tamotsu Nishida

Keisuke Ebata

In an optical pickup device for use in recording and reproducing on an optical recording medium, such as a CD or DVD, banks are formed on both sides of an adhesive agent application position for adhering an optical device, such as a photodetector or a laser diode, in an optical pickup case. At this time, a bank on the side of an optical path is formed higher than a height of an outer bank, and an adhesive agent is poured between the banks, to adhere the optical pickup case and the optical device.

Adhesive structure of optical device, adhesion method, and optical pickup device

There is provided a low-cost and reliable optical pickup device, wherein an objective lens is in contact with an adhesive at least one or more portions and fixed to the adhesive and also the height of the adhesive for fixing the objective lens is higher than the surface of the objective lens or the end of the objective lens, thereby a sufficient adhesive strength is secured between the objective lens and a member to which the objective lens is adhered and further this adhesive serves also as a disc protector.

Optical pickup device having disc protector

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

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Yokohama, Japan

Akiko Mizushima