Abstract: The invention provides a phosphor thin film having a high luminance, a satisfactory color purity enough to eliminate a need for filters, and a long luminance life, and best suited for each element of RGB in full color EL panels. The phosphor thin film of the invention comprises a matrix material and a luminescent center. The matrix material is a sulfide containing at least an alkaline earth element, Ga and/or In, sulfur (S) and optionally, Al, or an oxysulfide further containing oxygen (O) in addition to the foregoing elements. Provided that A stands for the alkaline earth element and B stands for Ga, In and Al in the matrix material, the atomic ratio B/A is in the range: B/A=2.1 to 3.5.

Abstract: The invention provides a phosphor thin film having a high luminance, a satisfactory color purity enough to eliminate a need for filters, and a long luminance life, and best suited for each element of RGB in full color EL panels. The phosphor thin film of the invention comprises a matrix material and a luminescent center. The matrix material is an oxysulfide containing at least an alkaline earth element, Ga and/or In, sulfur (S) and oxygen (O). In the matrix material, the atomic ratio of oxygen to the total of oxygen and sulfur, O/(S+O), is from 0.1 to 0.85.

Abstract: The invention aims to solve the problem of prior art EL devices that undesirable defects form in dielectric layers, and especially the problems of EL devices having dielectric layers of lead-base dielectric material including a lowering, variation and change with time of the luminance of light emission, and thereby provide an EL device ensuring high display quality without increasing the cost. Such objects are achieved by an EL device comprising at least an electrically insulating substrate 11 and a structure including an electrode layer 12, a dielectric layer 13, 14, 15, a light emitting layer 17 and a transparent electrode layer 19 stacked on the substrate 11, wherein the dielectric layer is a laminate including a first thick-film ceramic high-permittivity dielectric layer 13 whose composition contains at least lead, a second high-lead, layer 14 whose composition contains at least lead, and a third high-permittivity layer 15 whose composition is free of at least lead.

Abstract: The invention aims to provide a phosphor thin film eliminating a need for filters, having a satisfactory color purity, suited for RGB in full-color EL displays, enabling to simplify the manufacture process of full-color EL panels, and offering the advantages of minimized variation of luminance, increased yields, and reduced manufacture cost, a method for preparing the same and an EL panel. Such objects are achieved by a phosphor thin film formed of a matrix material comprising an oxysulfide consisting of at least one compound selected from rare earth thioaluminates, rare earth thiogallates and rare earth indates, in which oxygen is incorporated, the matrix material further containing an element serving as a luminescent center, a method for preparing the same, and an EL panel using the same.

Abstract: The invention aims to provide a phosphor thin film eliminating a need for filters, having a satisfactory color purity, suited for RGB in full-color EL displays, enabling to simplify the manufacture process of full-color EL panels, and offering the advantages of minimized variation of luminance, increased yields, and reduced manufacture cost, a method for preparing the same and an EL panel. Such objects are achieved by a phosphor thin film formed of a matrix material comprising an oxysulfide consisting of at least one compound selected from alkaline earth thiogallates and alkaline earth thioindates, in which oxygen is incorporated, the matrix material further containing an element serving as a luminescent center, a method for preparing the same, and an EL panel using the same.

Abstract: The invention aims to provide, without incurring any cost increase, a thin-film EL device comprising a multilayer dielectric layer formed of a lead-based dielectric material by a solution coating-and-firing process, which has solved problems including light emission luminance drops, luminance variations and changes of light emission luminance with time, thereby achieving high display quality, and a process for the fabrication of the same. The object is accomplished by forming a patterned electrode layer on an electrically insulating substrate and constructing thereon a dielectric layer having a multilayer structure wherein lead-based dielectric layers formed by repeating the solution coating-and-firing process plural times and a non-lead-based, high-permittivity dielectric layer are stacked, the uppermost surface layer of the dielectric layer having a multilayer structure being the non-lead-based, high-permittivity dielectric layer.

Abstract: An object of the invention is to provide an EL phosphor laminate thin film and EL device which can emit light at a high luminance. The object is achieved by stacking a phosphor thin film and a dielectric thin film one on the other wherein the phosphor thin film comprises at least one compound selected from an alkaline earth thioaluminate, an alkaline earth thiogallate and an alkaline earth thioindate as a main component, and a rare earth element as a luminescence center, and the dielectric thin film comprises an alkaline earth-containing oxide and/or a titanium-containing oxide.

Abstract: The invention has for its object to provide an EL phosphor multilayer thin film and EL device which can emit light with improved luminance. This object is achieved by the provision of an EL phosphor multilayer thin film wherein a phosphor thin film and a dielectric thin film are stacked one upon another. The phosphor thin film comprises a matrix material containing as a main component at least one compound selected from an alkaline earth thioaluminate, an alkaline earth thiogallate and an alkaline earth thioindate, and an rare earth element as a luminescent center, and the dielectric thin film comprises an alkaline earth oxide. There is also provided an EL device comprising such an EL phosphor multilayer thin film.

Abstract: In a film structure comprising a ferroelectric thin film formed on a substrate, the ferroelectric thin film contains a rare earth element (Rn), Pb, Ti, and O in an atomic ratio in the range: 0.8≦(Pb+Rn)/Ti≦1.3 and 0.5≦Pb/(Pb+Rn)≦0.99, has a perovskite type crystal structure, and is of (001) unidirectional orientation or a mixture of (001) orientation and (100) orientation. The ferroelectric thin film can be formed on a silicon (100) substrate, typically by evaporating lead oxide and TiOx in a vacuum chamber while introducing an oxidizing gas therein.

Abstract: The invention aims to provide a composite substrate which suppresses reaction of a substrate with a dielectric layer that can otherwise cause degradation of the dielectric layer and which can be sintered at high temperature while minimizing the occurrence of cracks in the dielectric layer, and an EL device using the composite substrate. The object is attained by a composite substrate in which an electrode and a dielectric layer are successively formed on an electrically insulating substrate, the substrate having a coefficient of thermal expansion of 10-20 ppm/K, and an EL device using the composite substrate.

Abstract: The invention aims to provide a phosphor thin film eliminating a need for filters, having a satisfactory color purity and useful as the blue color in full-color EL displays, a method for preparing the same and an EL panel. Such objects are achieved by a phosphor thin film formed of a matrix material comprising barium thioaluminate as a main component to which magnesium is added and rare earth element, Eu is added as a luminescent center, a method for preparing the same, and an EL panel using the same.

Abstract: A liquid crystal projector provided with one or a plurality of cooling fans comprises a temperature sensor for sensing the internal temperature of the liquid crystal projector, and a driving control circuit for controlling the driving voltage of the cooling fan on the basis of the temperature sensed by the temperature sensor. A driving control circuit controls the driving voltage of the cooling fan in proportion to the temperature sensed by the temperature sensor in a case where the temperature sensed by the temperature sensor is within a predetermined range.

Abstract: The invention has for its objects to provide a multilayer thin film comprising a ferroelectric thin film preferentially (001) oriented on an Si substrate, its fabrication process, and an electron device. To attain these object, the invention provides a multilayer thin film formed on a substrate by epitaxial growth, which comprises a buffer layer comprising an oxide and a ferroelectric thin film, with a metal thin film and an oxide thin film formed in this order between the buffer layer and the ferroelectric thin film, its fabrication process, and an electron device.

Abstract: The invention has for its objects to provide a multilayer thin film including a ferroelectric thin film having much more improved properties on an Si substrate and its fabrication process as well as an electron device comprising the same. This object is achieved by the provision of a multilayer thin film formed on an Si substrate by epitaxial growth, which comprises a buffer layer formed on the Si substrate, which layer includes an oxide thin film, a perovskite oxide thin film formed on the buffer layer, which film has a (100) or (001) orientation, and a ferroelectric thin film epitaxially grown on the perovskite oxide thin film and its fabrication process as well as an electron device comprising the same.

Abstract: The invention has for its object to provide a phosphor thin film which can dispense with any filter and has satisfactory color purity, is particularly well fit for RGB full-color Els, and simplifies a full-color EL panel production process, thereby providing a phosphor thin film which is less susceptible to luminance variations and can be produced in improved yields and so at lower costs and its fabrication process as well as an EL panel. This is achieved by the provision of a phosphor thin film comprising a matrix material containing as a main component an alkali earth aluminate that is an oxide, with sulfur added to the matrix material, and further containing an element that provides a luminescentce center.

Abstract: The invention aims to provide a phosphor multilayer eliminating a need for filters, having a satisfactory color purity and useful in white monochromatic EL devices, and an EL panel. Such objects are achieved by a phosphor multilayer comprising at least a first thin film and a second thin film wherein the first thin film is formed of a matrix material comprising barium aluminate as a main component, containing sulfur element and further containing Eu as a luminescent center, and the second thin film is formed of a matrix material comprising zinc sulfide as a main component, and an EL panel using the same.

Abstract: A fluorescent thin film is provided, comprising a matrix material containing as a main component a rare earth sulfide or a rare earth selenide and a rare earth element added thereto as a light emission center. The rare earth element is different from a rare earth element used for said matrix material.

Abstract: The first object of the invention is to provide means that enables a perovskite oxide thin film having (100) orientation, (001) orientation or (111) orientation to be easily obtained, and the second object of the invention is to provide a multilayer thin film comprising a unidirectionally oriented metal thin film of good crystallinity. The multilayer thin film according to the first embodiment of the invention comprises a buffer layer and a perovskite oxide thin film present thereon. The interface between the buffer layer and the perovskite oxide thin film is made up of a {111} facet plane. Substantially parallel to the facet plane there is present a {110} face of a cubic, rhombohedral, tetragonal or orthorhombic crystal of the perovskite oxide thin film, a {101} face of the tetragonal or orthorhombic crystal or a {011} face of the orthorhombic crystal.

Abstract: A thin film piezoelectric device has an epitaxial metal thin film (4) on a silicon substrate (2) and a PZT thin film (5) on the metal thin film, the PZT thin film (5) having a Ti/(Ti+Zr) atomic ratio between 0.65 and 0.90. A film bulk acoustic resonator having an extremely broad band is realized.

Abstract: In a film structure comprising a ferroelectric thin film formed on a substrate, the ferroelectric thin film contains a rare earth element (Rn), Pb, Ti, and O in an atomic ratio in the range: 0.8.ltoreq.(Pb+Rn)/Ti.ltoreq.1.3 and 0.5.ltoreq.Pb/(Pb+Rn).ltoreq.0.99, has a perovskite type crystal structure, and is of (001) unidirectional orientation or a mixture of (001) orientation and (100) orientation. The ferroelectric thin film can be formed on a silicon (100) substrate, typically by evaporating lead oxide and TiOx in a vacuum chamber while introducing an oxidizing gas therein.