Kabushiki Kaisha Toshiba

Toshio Nakayama

Akira Miura

Nobuhiro Gemma

Katsuyuki Naito

Syun Egusa

Shinya Aoki

Makoto Azuma

Koichi Mizushima

Yoshiaki Kawamonzen

Masami Sugiuchi

Shun Egusa

Masayoshi Okamoto

Several novel polyimide materials are disclosed. One example is a polyimide material comprising heterocyclic polyimide having an unit represented by the following general formula (1): 

Polyimide optical materials, polyimide precursor solutions and optical waveguide elements

Several novel polyimide materials are disclosed. One example is apolyimide material comprising heterocyclic polyimide having an unit represented by the following general formula (1): 

A light control element comprising a light control layer containing an electron donating organic compound and an electron accepting organic compound and means for applying an external electric field having an intensity less than a value which is required to cause phase transition in the light control layer to the layer, wherein charge transfer excitons are produced in application of the external electric field.

Optically-controlled light control element

Disclosed is an organic thin film device having an organic thin film consisting of a mixed-stacked charge-transfer complex, wherein the organic thin film contains n species of donor molecule D.sub.1 . . . D.sub.n and m species of acceptor molecule A.sub.1 . . . A.sub.m and forms mixed crystal represented by (D.sub.1).sub.x1 . . . (D.sub.n).sub.xn -(A.sub.1).sub.y1 . . . (A.sub.m).sub.ym and the combinations of a donor molecule and an acceptor molecule consist of a group forming ionic complex crystal and a group forming neutral complex crystal.

Organic thin film device

A method of forming an organic thin film includes developing organic molecules having a hydrophilic portion and a hydrophobic portion on a water surface, and compressing the organic molecules thereby to form a monomolecular layer of a predetermined surface pressure. The monomolecular layer is brought into contact with a given substrate. Then, the substrate to which the monomolecular layer is adhered, is pulled at such a rate that the surface pressure is not substantially lowered, thus transferring the monomolecular layer onto the substrate.

Method of forming an organic thin film

A field-effect transistor comprising a semiconductor substrate having source and drain regions and a gate electrode, wherein a thin organic film including donor and acceptor molecules is provided between the semiconductor substrate and the gate electrode. When a predetermined voltage is applied to the gate electrode, charge transfer occurs between the donor and acceptor molecules included in the thin organic film, thereby controlling the surface potential of the semiconductor substrate.

Field-effect transistor

An organic thin film element is disclosed which has an organic thin film consisting of a mixed stacked charge-transfer complex of donor and acceptor molecules, wherein the organic thin film is made neutral by forming the mixed stacked charge-transfer complex which is ionic under the bulk state into a thin film.

Organic thin film element

An organic thin film element has a structure in which an organic thin film layer, an insulating layer, and a back electrode are sequentially formed on a substrate obtained by forming an electrode, an insulating layer and a layer consisting of polycyclic aromatic group molecules or a derivative thereof or a carbon layer having a graphite structure on the surface of a substrate main body. An effect of controlling the orientation of the organic thin film layer can be enhanced by the surface layer of the substrate similar in chemical structure to molecules constituting the organic thin film layer. A neutral-ionic transition of a complex can be effectively caused by an electric field applied from the electrodes.

An organic thin film display element comprises a pair of electrodes, an organic thin film interposed between the electrodes and including both donor molecules and acceptor molecules, and an insulating layer having a relative dielectric constant of 10 or more, and interposed between at least one of the electrodes and the organic thin film.

Organic thin film display element

A polyimide thin film is formed on a substrate by imparting energy under vacuum, by means of heating, ultraviolet light or electron beam irradiation, or a combination thereof, to a polyimide having in the polymer main chain imide bonds and decomposable bonds such as carbon-carbon single bond differing from the imide bonds so as to break the decomposable bonds.

Method of manufacturing polyimide thin film and method of manufacturing

A semiconductor light-emitting element of a metal/organic film/semiconductor junction structure has a semiconductor layer, and an organic Langmuir-Blodgett thin film formed on the semiconductor layer. The thin film includes an electron donative organic monomolecular compound whose longest absorption peak wavelength in an electron transition spectrum falls within a range of 300 nm to 600 nm. A layer of metallic material is formed on the thin film.

Growing community of inventors

Fujisawa, Japan

Toshio Nakayama