A display device production method for producing a display device including a light emitting element in an active region and a terminal in a non-active region. The display device production method includes arranging a first mask overlapping with an electrode region of the light emitting element and a second mask overlapping with the terminal, on a conductive film that is arranged in the active region and the non-active region and that covers the terminal, and etching the conductive film.

A film applying apparatus includes a stage configured to receive a cover glass on the stage, the cover glass having curved portions at opposite ends of the cover glass, and a pressing member positioned in transverse to the cover glass. The pressing member includes a curved plane portion having a curvature radius less than a curvature radius of the curved portion, and a bend preventing portion with a cross section configured to prevent bending of the curved plane portion.

A method for producing an organic EL device in this disclosure includes the steps of providing an element substrate including a substrate and a plurality of organic EL devices arranged on the substrate; and forming a thin film encapsulation structure over the element substrate. The step of forming the thin film encapsulation structure includes the steps of forming a first inorganic barrier layer over the element substrate; condensing a photocurable resin on the first inorganic barrier layer; irradiating a plurality of selected regions of the photocurable resin with a laser beam to cure at least a part of the photocurable resin, thus to form a photocurable resin layer; removing an uncured part of the photocurable resin; and forming a second inorganic barrier layer, covering the photocurable resin layer, on the first inorganic barrier layer.

A cleaning apparatus is a mask cleaning apparatus for removing an organic matter adhering to a vapor deposition mask used for forming an organic thin film with a vapor deposition technique, and includes a dry cleaning device for removing the organic matter in a dry process, and a wet cleaning device for removing the organic matter in a wet process.

A bank (BK1b) and a bank (BK1a) having a height less than a height of the bank (BK1b) are intermittently provided on a bank (BK1) covering a peripheral portion of each first electrode (21) of a light emitting element.

An organic electroluminescent device (100) includes a substrate (1), a driving circuit layer (2), an inorganic protective layer (Pa), an organic flattening layer (Pb), an organic electroluminescent element layer (3), and a TFE structure (10). The TFE structure includes a first inorganic barrier layer (12), an organic barrier layer (14), and a second inorganic barrier layer (16). As seen in a direction of normal to the substrate, the organic flattening layer (Pb) is formed in a region where the inorganic protective layer (Pa) is formed, organic electroluminescent elements are located in a region where the organic flattening layer (Pb) is formed, and an outer perimeter of the TFE structure (10) crosses lead wires (32) and is present between an outer perimeter of the organic flattening layer (Pb) and an outer perimeter of the inorganic protective layer (Pa). In a region where the inorganic protective layer (Pb) and the first inorganic barrier layer (12) are in direct contact with each other on the lead wires (32), a tapering angle (12) of a side surface of a cross-section of the first inorganic barrier layer (12) taken along a plane parallel to a width direction of the lead wires (32) is smaller than 90 degrees.

Provided is a method for manufacturing a vapor deposition mask including a frame including a first side member and a second side member that extend in a first direction; and one or more mask sheets, the method including: stretching the one or more mask sheets on the first side member and the second side member in a state where an outside of the first side member is pressed in a direction from the first side member toward the second side member and where an outside of the second side member is pressed in a direction from the second side member toward the first side member.

A base substrate, a OLED element, and a seal portion covering the OLED element are included. The seal portion includes a first sealing film including an inorganic film, a second sealing film including an organic film, a third sealing film including an inorganic film, and a coupling layer formed between the first sealing film and the second sealing film.

An organic EL device (100A) includes an active region (R1) including a plurality of organic EL elements and includes a peripheral region (R2) located in a region other than the active region. The organic EL device includes an element substrate (1) including a substrate, and the plurality of organic EL elements supported by the substrate; and a thin film encapsulation structure (10A) covering the plurality of organic EL elements. The thin film encapsulation structure includes a first inorganic barrier layer (12), an organic barrier layer (14) in contact with a top surface of the first inorganic barrier layer, and a second inorganic barrier layer (16) in contact with the top surface of the first inorganic barrier layer and a top surface of the organic barrier layer. The peripheral region includes a first protruding structure (22a) including a portion extending along at least one side of the active region, the first protruding structure being supported by the substrate, and also includes an extending portion (12e), of the first inorganic barrier layer, extending onto the first protruding structure, the first protruding structure having a height larger than a thickness of the first inorganic barrier layer.

The disclosure provides a production method for an EL device including a base material, a TFT layer, and an EL layer; the production method including: forming at least a portion of the base material from a first resin film obtained by curing a first solution applied and a second resin film obtained by curing a second solution applied, wherein a viscosity of the first solution is made higher than a viscosity of the second solution.