Hitachi Chemical Company, Ltd.

Hitachi, Ltd.

Nippon Oil Fats Co., Ltd.

Ibiden Company Limited

Hitachi Software Engineering Company, Ltd.

Hitachi Chemical Company, Co.

Nobuyuki Hayashi

Seiji Tai

Mitsuo Katayose

Toshiaki Ishimaru

Katsushige Tsukada

Hideo Hagiwara

Takayuki Akimoto

Shigeru Hayashida

Koichi Kamijima

Asao Isobe

Masahiro Abo

Akio Mukoh

Setsuo Kobayashi

Susumu Era

Shigeo Tachiki

Hiroshi Takeda

Osamu Nishii

Noriyuki Kinjo

Makoto Kaji

Yasushi Iwakabe

Shunichi Numata

Tetsuhiko Okada

Hajime Kakumaru

Noriharu Hiratsuka

Yoshii Morishita

Masaharu Nakayama

Hideo Sawada

Yasunori Okada

Shozo Kasai

Motohiro Mitani

Yuichi Osada

Mineo Nakano

Ken Ogawa

Futami Kaneko

Tadashi Okamoto

Hideo Yamada

Haruo Akahoshi

Toshikazu Narahara

Motoyo Wajima

Yoshio Sato

Mineo Kawamoto

Kanji Murakami

Tomohisa Ohta

Tohru Kikuchi

Shigeru Koibuchi

Yasunori Kojima

Mitsumasa Kojima

Tadashi Fujii

Kazuhiko Matsumoto

Ritsuji Toba

Yoshiaki Tomisawa

Kuniaki Sato

Kaoru Moriwaki

Kiyoshi Nakao

Katsunori Tsuchiya

Akio Tadokoro

Tadaji Satou

Takao Shinsha

Takashi Yamadera

Yasunori Yamada

Takahiro Nakata

Hiromoto Sakaki

Junji Koshishita

Yusuke Miyamae

Koichi Kamajima

Miyako Tandai

Tadazi Sato

A data processing system including a processor LSI and a DRAM divided into banks, for increasing a ratio of using a fast operation mode for omitting transfer of a row address to the DRAM and for minimizing the amount of logics external to the processor LSI. The processor LSI includes row address registers for holding recent row addresses corresponding to the banks. The contents of the row address registers are compared with an accessed address by a comparator to check for each bank whether the fast operation mode is possible. As long as the row address does not change in each bank, the fast operation mode can be used, thus making it possible to speed up operations, for example in block copy processing.

Data processing system

Memory system performing fast access to a memory location by omitting

An incremental logic synthesis system for generating an optimized circuit from given logic, wherein the optimized circuit satisfies a design constriction. The system includes a logic input device for inputting an old logic, an old circuit generated from the old logic and optimized to satisfy the design constriction, and a new logic partially changing from the old logic file, a logic synthesizing device for generating a first intermediate circuit file from the new logic file, a discriminating device for discriminating a common sub-circuit of the old circuit having an equivalent logic function and an uncommon sub-circuit of the first intermediate circuit having an inconsistent logic function, from the old circuit and the first intermediate circuit, a circuit updating device for generating a second intermediate circuit file by merging the common sub-circuit of the old circuit and the uncommon sub-circuit of the first intermediate circuit, and an optimizing device for optimizing the uncommon sub-circuit of the second intermediate circuit so as to satisfy the design constriction.

Logic synthesis method and system with intermediate circuit files

A naphthalocyanine derivative of the formula: ##STR1## wherein M, Y, R.sup.1, k, l, m, n are as defined in the specification, is an effective substance for forming a recording layer on a substrate of an optical recording medium having high sensitivity with good properties.

Naphthalocyanine derivatives, production thereof, optical recording

A derivative of naphthalocyanine containing a perfluoroalkyl group and having a particular structure for ensuring excellent weather-proof properties, extremely high solubility in various solvents and capability of forming a film, and an optical recording medium prepared by using the derivative and capable of recording while using a focused beam of a semiconductor laser or the like. The derivative of naphthalocyanine containing a perfluoroalkyl group may be prepared by reacting a perfluoroalkanoyl peroxide having a particular structure with a naphthalocyanine.

Derivative of naphthalocyanine containing perfluoroalkyl group, process

Special tetraazaporphins containing Si, Ge or Sn as the central metal are useful for forming a recording layer in an optical recording medium.

Tatraazaporphin, process for producing the same, as well as optical

A naphthalocyanine derivative having at least one substituent of the formula: SO.sub.2 R.sup.1, wherein R.sup.1 is an alkyl group, a substituted alkyl group or an aryl group is excellent in ability to absorb diode laser beams and suitable for use in an optical recording medium.

Naphthalocyanine derivatives, production thereof and optical recording

A photosensitive resin composition comprising (A) a polymer obtained by reacting an isocyanate compound having an ethylenic unsaturated group with a polymer which is a reaction product of a tetracarboxylic acid dianhydride and a diamine, and (B) a photoinitiator, can provide a thick film excellent in heat resistant, adhesiveness, flexibility, electrical and mechanical properties, and is particularly suitable for producing a photosensitive element.

Photosensitive resin composition and photosensitive element using the

There are disclosed a novel naphthalocyanine derivative represented by the general formula [I] or [II] shown below, a process for preparing said derivative, an optical information recording medium using said derivative, and a process for preparing thereof: ##STR1## wherein M is a metal, metal oxide, metal hydroxide and the like, R.sup.1 is an alkyl group of 1-22 carbon atoms, n is an integer of 1 to 4, and Y.sub.1 and Y.sub.2 aryloxy group and the like.

Naphthalocyanine derivative and production process thereof, as well as

Tetraazaporphin, process for producing the same, as well as optical

2,3-dicyanonaphthalene derivatives useful in the synthesis of naphthalocyanine derivatives are disclosed. The 2,3-dicyanonaphthalene derivatives have the formula: ##STR1## wherein each R.sup.1 may be the same or different and represents an alkyl group, substituted alkyl group, or aryl group; and n is an integer from 1 to 4.

2,3-dicyanonaphthalene derivatives

A photopolymerizable composition comprising an addition polymerizable compound, an N-aryl-.alpha.-amino acid and a photosensitizer capable of absorbing a light having a wavelength of 300 nm or more such as thioxanthones, isoalloxazines, coumarines, and the like is excellent in sensitivity to irradiated light and is suitable for preparing relief images, photoresists, etc.

Photopolymerizable composition

A naphthalocyanine derivative having as substituents at least one group of a formula: SR.sup.1 wherein R.sup.1 is --(CR.sup.2 R.sup.3).sub.x SiR.sup.4 R.sup.5 R.sup.6, in which R.sup.2 to R.sup.6 are H, alkyl groups, etc. is excellent in solubility in saturated hydrocarbon solvents and in absorption of semiconductor laser lights and thus, is suitable for producing optical recording media.

Growing community of inventors

Hitachi, Japan

Nobuyuki Hayashi