Sumitomo Seika Chemicals Co., Ltd.

Japan Advanced Institute of Science and Technology

Kazuhiro Fukada

Tatsuya Shimoda

Satoshi Inoue

Kiyoshi Nishioka

Masahiro Suzuki

Nobutaka Fujimoto

The etching maskfor screen printing according to one embodiment of the present invention includes aliphatic polycarbonate. Further, the method of producing an oxide layer (the channel) according to one embodiment of the present invention includes: an etching-mask forming step of forming a pattern of the etching maskincluding aliphatic polycarbonate; a contact step of, after the etching-mask forming step, contacting the oxide layer with a solution for dissolving a portion of the oxide layer (the channel) which is not protected by the etching mask; and a heating step of, after the contact step, heating the oxide layer (the channel) and the etching maskto or above a temperature at which the etching maskis decomposed.

Method of producing etching mask, etching mask precursor, and oxide layer, and method of manufacturing thin film transistor

A laminate by using a paste or solution containing aliphatic polycarbonates having an etching mask function is provided. A method of producing a laminate of the present invention includes a pattern forming step of forming a patternof a first oxide precursor layer in which a compound of metal to be oxidized into a metal oxide is dispersed in a solution containing a binder (possibly including inevitable impurities) made of aliphatic polycarbonates on an oxide layeror on the second oxide precursor layer to be oxidized into the oxide layeran etching step of, after the pattern forming step, etching the oxide layeror the second oxide precursor layer that is not protected by the patternand a heating step of, after the etching step, heating the oxide layeror the second oxide precursor layer, and the first oxide precursor layer to a temperature at which the binder is decomposed or higher.

Laminate, etching mask, method of producing laminate, method of producing etching mask, and method of producing thin film transistor

[Problem] Provided is a composite member which can contribute to simple formation and/or increased quality of fine wiring. [Solution] A composite memberaccording to one embodiment of the present invention includes a base material, an aliphatic polycarbonate-containing layer with multiple island-shaped portions arranged on the base material, and a metal ink, wherein at least a surface of the aliphatic polycarbonate-containing layer with multiple island-shaped portions has a contact angle of 50&#xb0; or more between pure water and the surface when exposed to ultraviolet light including a wavelength of 180 nm or more and 370 nm or less for 15 minutes, and the metal ink is arranged on the base material at at least a portion of a region sandwiched by the precursor layers.

Composite member and method of manufacturing the same, and aliphatic polycarbonate-containing layer

An aliphatic polycarbonate, an oxide precursor, and an oxide layer are provided, which are capable of controlling stringiness, when a thin film that can be employed for an electronic device or a semiconductor element is formed by a printing method. In an oxide precursor of the present invention, a compound of metal to be oxidized into a metal oxide is dispersed in a solution containing a binder (possibly including inevitable impurities) made of aliphatic polycarbonates, and an aliphatic polycarbonate having a molecular weight of 6000 or more and 400000 or less constitutes 80% by mass or more of all the aliphatic polycarbonates.

Oxide precursor, oxide layer, semiconductor element, and electronic device, and method of producing oxide layer and method of producing semiconductor element

Growing community of inventors

Hiroshima, Japan

Kazuhiro Fukada