Ricoh Company, Ltd.

Sadanori Arae

Yuki Nakamura

Shinji Matsumoto

Naoyuki Ueda

Yukiko Abe

Yuji Sone

Ryoichi Saotome

Minehide Kusayanagi

Yuichi Ando

Mikiko Takada

A coating liquid for forming an n-type oxide semiconductor film, the coating liquid including: a Group A element, which is at least one selected from the group consisting of Sc, Y, Ln, B, Al, and Ga; a Group B element, which is at least one of In and Tl; a Group C element, which is at least one selected from the group consisting of Group 4 elements, Group 5 elements, Group 6 elements, Group 7 elements, Group 8 elements, Group 9 elements, Group 10 elements, Group 14 elements, Group 15 elements, and Group 16 elements; and a solvent.

Coating liquid for forming n-type oxide semiconductor film, method for producing n-type oxide semiconductor film, and method for producing field-effect transistor

A field-effect transistor including: a source electrode and a drain electrode; a gate electrode; a semiconductor layer; and a gate insulating layer, wherein the gate insulating layer is an oxide insulator film including A element and B element, the A element being one or more selected from the group consisting of Zr and Hf and the B element being one or more selected from the group consisting of Be and Mg.

Coating liquid for forming metal oxide film, oxide insulator film, field-effect transistor, display element, image display device, and system

To provide a field-effect transistor, containing: a substrate; a protective layer; a gate insulating layer formed between the substrate and the protective layer; a source electrode and a drain electrode, which are formed to be in contact with the gate insulating layer; a semiconductor layer, which is formed at least between the source electrode and the drain electrode, and is in contact with the gate insulating layer, the source electrode, and the drain electrode; and a gate electrode, which is formed at an opposite side to the side where the semiconductor layer is provided, with the gate insulating layer being between the gate electrode and the semiconductor layer, and is in contact with the gate insulating layer, wherein the protective layer contains a metal oxide composite, which contains at least Si and alkaline earth metal.

Field-effect transistor including a metal oxide composite protective layer, and display element, image display device, and system including the field-effect transistor

A coating liquid for forming a metal oxide film, the coating liquid including: a metal source, which is at least one selected from the group consisting of inorganic salts, oxides, hydroxides, metal complexes, and organic acid salts; at least one alkali selected from the group consisting of organic alkalis and inorganic alkalis; and a solvent.

Coating liquid for forming metal oxide film, oxide film, field-effect transistor, and method for producing the same

A field-effect transistor including a semiconductor layer formed of an n-type metal oxide semiconductor, wherein the n-type metal oxide semiconductor includes indium oxide, wherein the indium oxide is n-type doped through introduction of one or more kinds of cations as dopants, and wherein the n-type metal oxide semiconductor has a peak detected at an angle corresponding to a (222) plane of indium oxide having a bixbite structure in an X-ray diffraction method using a two-dimensional detector.

Field-effect transistor, display element, image display device, and system

An inorganic EL element including: an anode; a hole transporting layer; a light emitting layer; an electron transporting layer; and a cathode, the anode, the hole transporting layer, the light emitting layer, the electron transporting layer, and the cathode being stacked, wherein the hole transporting layer is an oxide film, the light emitting layer is an oxide film, and the electron transporting layer is an oxide film.

Inorganic el element, display element, image display device, and system

(Object) To miniaturize a field-effect transistor. (Means of Achieving the Object) A field-effect transistor includes a semiconductor film formed on a base, a gate insulating film formed on a part of the semiconductor film, a gate electrode formed on the gate insulating film, and a source electrode and a drain electrode formed in contact with the semiconductor film, wherein a thickness of the source electrode and the drain electrode is smaller than a thickness of the gate insulating film, and the gate insulating film includes a region that is not in contact with the source electrode or the drain electrode.

Field-effect transistor, method for producing same, display element, display device, and system

A coating liquid for forming an oxide, the coating liquid including: A element, which is at least one alkaline earth metal; and B element, which is at least one selected from the group consisting of gallium (Ga), scandium (Sc), yttrium (Y), and lanthanoid, wherein when a total of concentrations of the A element is denoted by Cmg/L and a total of concentrations of the B element is denoted by Cmg/L, a total of concentrations of sodium (Na) and potassium (K) in the coating liquid is (C+C)/10mg/L or less and a total of concentrations of chromium (Cr), manganese (Mn), iron (Fe), cobalt (Co), nickel (Ni), and copper (Cu) in the coating liquid is (C+C)/10mg/L or less.

Coating liquid for forming oxide, method for producing oxide film, and method for producing field-effect transistor

A coating liquid for forming an oxide or oxynitride insulator film, the coating liquid including: A element; at least one selected from the group consisting of B element and C element; and a solvent, wherein the A element is at least one selected from the group consisting of Sc, Y, Ln (lanthanoid), Sb, Bi, and Te, the B element is at least one selected from the group consisting of Ga, Ti, Zr, and Hf, the C element is at least one selected from the group consisting of Group 2 elements in a periodic table, and the solvent includes at least one selected from the group consisting of an organic solvent having a flash point of 21&#xb0; C. or more but less than 200&#xb0; C. and water.

Coating liquid for forming oxide or oxynitride insulator film, oxide or oxynitride insulator film, field-effect transistor, and method for producing the same

A field-effect transistor including: a gate electrode, which is configured to apply gate voltage; a source electrode and a drain electrode, which are configured to take electric current out; an active layer, which is disposed between the source electrode and the drain electrode and is formed of an oxide semiconductor; and a gate insulating layer, which is disposed between the gate electrode and the active layer, the source electrode and the drain electrode each including a metal region formed of a metal and an oxide region formed of one or more metal oxides, and a part of the oxide region in each of the source electrode and the drain electrode being in contact with the active layer, and rest of the oxide region being in contact with one or more components other than the active layer.

Field-effect transistor, method for producing the same, display element, image display device, and system

Method for producing field-effect transistor including source electrode and drain electrode, gate electrode, active layer, and gate insulating layer, the method including etching the gate insulating layer, wherein the gate insulating layer is metal oxide including A-element and at least one selected from B-element and C-element, the A-element is at least one selected from Sc, Y, Ln (lanthanoid), Sb, Bi, and Te, the B-element is at least one selected from Ga, Ti, Zr, and Hf, the C-element is at least one selected from Group 2 elements in periodic table, etching solution A is used when at least one selected from the source electrode and the drain electrode, the gate electrode, and the active layer is formed, and etching solution B that is etching solution having same type as the etching solution A is used when the gate insulating layer is etched.

Metal oxide, field-effect transistor, and method for producing the same

A method for manufacturing a field effect transistor including a gate-insulating layer, an active layer, and a passivation layer. The method includes a first process of forming the gate-insulating layer; and a second process of forming the passivation layer. At least one of the first process and the second process includes: forming a first oxide containing an alkaline earth metal and at least one of gallium, scandium, yttrium, and a lanthanoid; and etching the first oxide by use of a first solution containing at least one of hydrochloric, acid, oxalic acid, nitric acid, phosphoric acid, acetic acid, sulfuric acid, and hydrogen peroxide water.

Method for manufacturing a field effect transistor, method for manufacturing a volatile semiconductor memory element, method for manufacturing a non-volatile semiconductor memory element, method for manufacturing a display element, method for manufacturing an image display device, and method for manufacturing a system

A field-effect transistor including: a gate electrode, which is configured to apply gate voltage; a source electrode and a drain electrode, which are configured to transfer an electrical signal; an active layer, which is formed between the source electrode and the drain electrode; and a gate insulating layer, which is formed between the gate electrode and the active layer, the active layer including at least two kinds of oxide layers including layer A and layer B, and the active layer satisfying at least one of condition (1) and condition (2) below:

A method is provided for manufacturing a field effect transistor that includes a gate insulating layer and an electrode including a first conductive film and a second conductive film successively laminated on a predetermined surface of the gate insulating layer. The method includes forming an oxide film including element A, which is an alkaline earth metal, and element B, which is at least one of Ga, Sc, Y and a lanthanide, as the gate insulating layer; forming a first conductive film that dissolves in an organic alkaline solution on the oxide film; forming a second conductive film on the first conductive film; etching the second conductive film with an etching solution having a higher etch rate for the second conductive film as compared with that for the first conductive film; and etching the first conductive film with the organic alkaline solution using the second conductive film as a mask.

Field effect transistor, method for manufacturing same, display element, display device, and system

A field-effect transistor including: a gate electrode, which is configured to apply gate voltage; a source electrode and a drain electrode, which are configured to take electric current out; a semiconductor layer, which is disposed to be adjacent to the source electrode and the drain electrode; and a gate insulating layer, which is disposed between the gate electrode and the semiconductor layer, wherein the gate insulating layer includes a first gate insulating layer containing a first oxide containing Si and an alkaline earth metal and a second gate insulating layer disposed to be in contact with the first gate insulating layer and containing a paraelectric amorphous oxide containing a Group A element which is an alkaline earth metal and a Group B element which is at least one selected from the group consisting of Ga, Sc, Y, and lanthanoid.

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Kanagawa, Japan

Sadanori Arae