Ricoh Company, Ltd.

Other

Miyoshi Yushi Kabushiki Kaisha

Richo Company, Ltd.

Masafumi Torii

Masaru Shimada

Kyoji Tsutsui

Hiromi Furuya

Hiroaki Matsui

Masafumi Moriya

Masaomi Sasaki

Satoshi Yamamoto

Takashi Okada

Toshiya Sagisaka

Kazuo Hosoda

Fumio Kawamura

Kunio Hayakawa

Katsuhisa Kamio

Shinji Matsumoto

Tamotsu Aruga

Shinichi Kawamura

Daisuke Goto

Tadafumi Tatewaki

Takuji Kato

Yoshihiko Hotta

Hideyuki Kobori

Hitoshi Hattori

Mitsuru Naruse

Katsushi Sugiyama

Katsuaki Kokubo

Koji Kawai

Kunitoshi Sugiyama

Hiroshi Ikuno

Tamotsu Horiuchi

Toshiyuki Furuta

Mitsunobu Morita

Yoshikazu Akiyama

Shoji Maruyama

Tomohiko Beppu

Takeshi Orito

Masataka Mohri

Hitoshi Kondoh

Yoshinobu Nakayama

Kunichika Moroboshi

Keishi Taniguchi

Keishi Kubo

Hidenori Tomono

Takumi Yamaga

Kunichika Morohoshi

Chihaya Adachi

Atsushi Kutami

Hitoshi Shimbo

Hideo Suzaki

Masatake Kawashima

Kenji Muneuchi

Yuuichiroh Kawamura

A polymer containing a repeating unit expressed by General Formula (I): 

Arylamine polymer, method for producing the same, ink composition, film, electronic device, organic thin-film transistor, and display device

A [1]benzothieno[3,2-b][1]benzothiophene compound expressed by General Formula (I): General Formula (I) where X and Y are each independently a hydrogen atom; a halogen atom; or a functional group having a straight or branched aliphatic alkyl group optionally having a halogen atom, a functional group having an alicyclic alkyl group optionally having a halogen atom, a functional group having a straight or branched aliphatic alkenyl group optionally having a halogen atom, a functional group having an alicyclic alkenyl group optionally having a halogen atom, a functional group having a carboxyl group, or a functional group having a thiol group, as a partial structure; and X and Y are the same or each independently different, provided that at least one of X and Y has a straight or branched aliphatic alkenyl group, an alicyclic alkenyl group, a carboxyl group or a thiol group, as a partial structure. 

[1]benzothieno[3,2-B][1]benzothiophene compound and method for producing the same, and organic electronic device using the same

A benzobisthiazole compound having a specific formula, and a benzobisthiazole polymer having a specific benzothiazole structure. An organic film including the benzobisthiazole polymer, the benzobisthiazole compound and/or a polymer obtained from the benzobisthiazole compound. An organic thin-film transistor including an organic semiconductor layer including the organic film; a pair of electrodes configured to flow an electric current through the organic semiconductor layer; and a third electrode configured to apply a voltage to the organic semiconductor layer.

Benzobisthiazole compound, benzobisthiazole polymer, organic film including the compound or polymer and transistor including the organic film

Provided are pi-conjugated polymer materials that are useful for photoelectric transducer elements having high hole transportability and excellent durability, that are useful for light-emitting elements having superior emitting properties and excellent durability, and that are useful for active layers of thin film transistors. The pi-conjugated polymers comprise a constitutional unit expressed by the General Formula (I) or (II): in which, Ar represents an aromatic hydrocarbon group or a heterocyclic group that may have a substituent; R represents a hydrogen atom, an alkyl group or an aromatic hydrocarbon group that may have a substituent; Arrepresents a divalent group of an aromatic hydrocarbon or a heterocycle that may have a substituent; in which, Ar represents an aromatic hydrocarbon group or a heterocyclic group that may have a substituent; R represents a hydrogen atom, an alkyl group or an aromatic hydrocarbon group that may have a substituent.

Pi-conjugated polymer

An organic thin-film transistor, including a layer exposing a benzene ring, having a surface separation of from 2.8 to 3.0 &#x212b;; and an organic semiconductive layer located overlying the layer exposing a benzene ring.

Organic thin-film transistor

A 3,6-diphenylcarbazole compound, which has a specific formula and realizes an organic electroluminescent device having high durability and high luminous efficiency. An electroluminescent device which includes an anode; a cathode which faces the anode; and at least one layer including a luminescent layer, optionally a hole transporting layer and an electron transporting layer, which is located between the anode and the cathode, wherein the at least one layer includes the 3,6-diphenylcarbazole compound.

3, 6-diphenylcarbazole compound and organic electroluminescent device

The present invention provides a &#x3c0;-conjugated polymer containing a repeating unit expressed by the following General Formula (I):  where, in the General Formula (I), Y and Ar represent one of a substituted or unsubstituted aromatic hydrocarbon and a substituted or unsubstituted divalent group of aromatic heterocyclic ring, Yrepresents one of a substituted or unsubstituted unsaturated aliphatic hydrocarbon, a substituted or unsubstituted aromatic hydrocarbon and a substituted or unsubstituted divalent group of aromatic heterocyclic ring and R represents one of a hydrogen atom, a substituted or unsubstituted alkyl group and a substituted or unsubstituted aromatic hydrocarbon group.

&#x3c0;-Conjugated polymer and manufacturing method thereof

An aryl amine polymer is provided which contains a specific repeat unit, its use in preparing an organic semiconductor material which contains the aryl amine polymer and an additional specific compound and in the preparation of organic light emitting devices (OLED), organic thin film transistors (TFT) and so on, along with an organic TFT including a substrate, an organic semiconductor layer which contains the organic semiconductor material and is located overlying the substrate, an electrode pair of a source electrode and a drain electrode; and a third electrode.

Aryl amine polymer, thin film transistor using the new aryl amine polymer, and method of manufacturing the thin film transistor

Aryl amine polymer, thin film transistor using the aryl amine polymer, and method of manufacturing the thin film transistor

A thermosensitive recording material comprising a thermosensitive layer provided on a substrate, and the thermosensitive layer comprises as main ingredients a leuco dye and a developer to make colored state of said leuco dye when heated, wherein the developer is an oligomer composition obtained from the reaction of a polyvalent isocyanate compound represented by following Formula (I) with an aromatic amine represented by following Formula (II); where X represents a try- or more-valent group, a represents an integer numeral of 3 or more, b and c represent respectively integer numerals in the range of 0 to 5 and they satisfy a relation of b+c=1 to 5, Z represents hydrogen atom, alkyl group, allyl group or aryl group, and the aryl group may include condensed ling structure thereof, and d represents an integer numeral in the range of 0 to 4. This developer shows excellent reliabilities of both image and background area, and also shows an excellent color-developing characteristics (color developing sensitivity and image density).

Thermosensitive recording material, and synthesis method of oligomer composition for the recording material

A thermosensitive recording material comprising a thermosensitive layer provided on a substrate, and the thermosensitive layer comprises as main ingredients a leuco dye and a developer to make colored state of said leuco dye when heated, wherein the developer is an oligomer composition obtained from the reaction of a polyvalent isocyanate compound represented by following Formula (I) with an aromatic amine represented by following Formula (II);()&#x2003;&#x2003;Formula (I)where X represents a try- or more-valent group, a represents an integer numeral of 3 or more, b and c represent respectively integer numerals in the range of 0 to 5 and they satisfy a relation of b+c=1 to 5, Z represents hydrogen atom, alkyl group, allyl group or aryl group, and the aryl group may include condensed ling structure thereof, and d represents an integer numeral in the range of 0 to 4. This developer shows excellent reliabilities of both image and background area, and also shows an excellent color-developing characteristics (color developing sensitivity and image density).

Light-permeable thermosensitive recording material

An erasable recording material including a substrate, and an erasable recording layer which is formed overlying the substrate and in which image information is repeatedly recorded and erased, and optionally includes an undercoat layer formed between the substrate and the recording layer, a protective layer formed overlying the recording layer and an intermediate layer formed between the recording layer and the protective layer, wherein the erasable recording material further includes one or more markers which are used for inputting image information additionally written on the recording material. An information recording system and method are also provided in which additional information written on the erasable recording material, in which image information is previously recorded, is incorporated to the previously recorded image information.

Erasable recording material capable of inputting additional information written thereon and information recording system and information recording method using the recording material

Reversible thermosensitive coloring composition and recording material using the composition and recording method using the recording material

Growing community of inventors

Yokohama, Japan

Masafumi Torii