Abstract: The display device of the present invention relates to a display device characterized in that it includes a first electrode formed on a substrate, an insulating layer formed on the first electrode in such a way that the first electrode is partially exposed, and a second electrode providing facing the first electrode, and the insulating layer is a positive-type photosensitive polyimide in which the indispensable components are polymer having structural units represented by the following general formula (1) as its chief component and a photoacid generator.

Abstract: A method for producing an organic electroluminescent device, which is provided with first electrodes formed on a substrate, a thin film layer formed on the first electrode containing at least an emitting layer composed of an organic compound and a plurality of second electrodes formed on the thin film layer, and has a plurality of luminescent regions on said substrate, comprising the steps of forming spacers having a height at least partially exceeding the thickness of said thin film layer on the substrate, and vapor-depositing a deposit for patterning while the shadow mask having reinforcing lines formed across its apertures is kept in contact with said spacers. Highly precise fine patterning can be effected under wide vapor deposition conditions without degrading the properties of organic electroluminescent elements, and high stability can be achieved by a relatively simple process without limiting the structure of the electroluminescent device.

Abstract: An integrated mask including a plurality of deposition masks, each deposition mask having an array of deposition apertures formed in accordance with a deposition pattern; and a base plate having a plurality of openings on which the deposition masks are arranged is provided. The deposition mass are retained to the base plate by engaging unit in a disengageable manner, and alignment marks used for positioning the deposition masks on the base plate are formed on the base plate. In addition a method and apparatus for fabricating the intergrated mask, a method and apparatus for manufacturing an organic EL device using the integrated mask, and an organic EL device are provided.

Abstract: A method for producing an organic electroluminescent device, which is provided with first electrodes formed on a substrate, a thin film layer formed on the first electrode containing at least an emitting layer composed of an organic compound and a plurality of second electrodes formed on the thin film layer, and has a plurality of luminescent regions on said substrate, comprising the steps of forming spacers having a height at least partially exceeding the thickness of said thin film layer on the substrate, and vapor-depositing a deposit for patterning while the shadow mask having reinforcing lines formed across its apertures is kept in contact with said spacers.

Abstract: A method for producing an organic electroluminescent device, which is provided with first electrodes formed on a substrate, a thin film layer formed on the first electrode containing at least an emitting layer composed of an organic compound and a plurality of second electrodes formed on the thin film layer, and has a plurality of luminescent regions on said substrate, comprising the steps of forming spacers having a height at least partially exceeding the thickness of said thin film layer on the substrate, and vapor-depositing a deposit for patterning while the shadow mask having reinforcing lines formed across its apertures is kept in contact with said spacers.

Abstract: Disclosed herein is an improvement of a welding process for welding a steel pipe, wherein a gas metal arc welding is performed to form the first welding layer and a submerged arc welding is performed to form the last welding layer. According to the conventional gas metal arc welding process, i.e. the MIG or CO.sub.2 welding processes, the combined use of a high welding current and a welding wire having a small diameter is known to bring about the rotation of the welding arc and the formation of an undercut along the toe of the weld metal. The purpose of the present invention is to weld a steel pipe having either a large thickness or an excellent ductility at a temperature of less than -40.degree. C., or both. According to the present invention, the combined use of a high welding current and a wire having a small diameter is possible, by employing a gas mixture containing an inert gas as a major part thereof and CO.sub.2 as an additional part thereof as a shielding gas.

Abstract: In one embodiment, a resonant circuit comprising a ground-contacting conductive member, a dielectric layer provided on the ground-contacting conductive layer, a ground-contacting member provided on the dielectric layer and electrically connected to the ground-contacting conductive member, and a U-shaped microstrip line formed on the dielectric layer. Both ends of the U-shaped microstrip line face the ground-contacting member. One of them is connected to the ground-contacting member through a lumped capacitor, and the other end is directly connected to the ground-contacting member.