Provided is a long-life organic electroluminescent illumination panel which is flexible and, even when a load is applied by bending, impact or vibration, can suppress the occurrence of defects in an electrode layer and an organic layer containing an organic electroluminescent material, and which can suppress the occurrence of dark spots due to short circuiting. This organic electroluminescent illumination panel includes: a pair of electrode layers, at least one of which is transparent, between a flexible film substrate and a flexible film sealing material, at least one of which is transparent; and an organic layer containing an organic electroluminescent material which is sandwiched between the pair of electrode layers. This organic electroluminescent illumination panel has multiple spacers which are disposed on an electrode layer laminated on the flexible film substrate so as to pass through the organic layer and another electrode layer.

Provided is a long-life organic electroluminescent illumination panel which is flexible and, even when a load is applied by bending, impact or vibration, can suppress the occurrence of defects in an electrode layer and an organic layer containing an organic electroluminescent material, and which can suppress the occurrence of dark spots due to short circuiting. This organic electroluminescent illumination panel includes: a pair of electrode layers, at least one of which is transparent, between a flexible film substrate and a flexible film sealing material, at least one of which is transparent; and an organic layer containing an organic electroluminescent material which is sandwiched between the pair of electrode layers. This organic electroluminescent illumination panel has multiple spacers which are disposed on an electrode layer laminated on the flexible film substrate so as to pass through the organic layer and another electrode layer.

A deposition mask includes a mask body and a through-hole provided in the mask body and through which a deposition material passes when the deposition material is deposited on a deposition target substrate. The mask body satisfies y≥950 and y≥23x−1280 when an indentation elastic modulus is x (GPa) and a 0.2% yield strength is y (MPa).

A deposition mask includes a mask body and a through-hole provided in the mask body and through which a deposition material passes when the deposition material is deposited on a deposition target substrate. The mask body satisfies y≥950 and y≥23x−1280 when an indentation elastic modulus is x (GPa) and a 0.2% yield strength is y (MPa).

An organic electroluminescent (EL) display device includes organic EL elements respectively located in pixels and a thin film encapsulation structure covering the pixels. Each of the organic EL elements has a microcavity structure. A thickness of an organic EL layer in the blue pixel and a thickness of an organic EL layer in the red pixel are deviated from of the optimum value of respective microcavity structures. The device further includes a first polydiacetylene layer selectively provided only on the thin film encapsulation structure on the blue pixel, which exhibits blue color and further narrows a spectral width of the blue light, a second polydiacetylene layer selectively provided only on the thin film encapsulation structure on the red pixel, which exhibits red color and further narrows a spectral width of the red light, and no polydiacetylene layer on the thin film encapsulation structure on the organic EL element that emits only the green light. The first and second polydiacetylene layers are formed of a polymer of 10,12-pentacosadiynoic acid.

To obtain a vapor-deposition mask that suppresses heat conduction at a frame of the vapor-deposition mask and make the weight thereof lighter to achieve upsizing of the vapor-deposition mask and carry out high-definition vapor-deposition cheaply, the frame (15) to which a mask main body (10) is bonded is formed as a sandwich structure (150) in which end plate (152) is bonded onto an opposing surface of at least a part of a core portion (151) in the vapor-deposition mask disclosed in the present embodiment.

A rigid material whose linear expansion coefficient is small and whose relative density is small is used to provide a vapor-deposition mask using a lightweight and highly dimension-accurate frame. A frame (15) of the vapor-deposition mask disclosed in accordance with the present embodiment is formed with a carbon-fiber reinforced plastic (CFRP).

Included are the steps of: forming a laminated body (7) by disposing a resin layer (12), an inorganic layer (3) having mean stress (Px) of 0 (zero) or having tensile stress, a TFT layer (4), an OLED element layer (5), and a sealing layer (6) in this order on an upper side of a supporting substrate (50); and separating the supporting substrate (50) from the laminated body (7).

A display device includes a plurality of sub-pixels. The sub-pixels include, in common, a common hole-transport layer disposed between an anode and a light-emitting layer. Each sub-pixel individually includes an individual hole-transport layer disposed between the common hole-transport layer and the light-emitting layer. The common hole-transport layer is made of a first hole-transport-layer material. A sub-pixel has a first color and includes a first individual hole-transport layer made of a second hole-transport-layer material. A sub-pixel has a second color and includes a second individual hole-transport layer made of a mixed material of the first and second hole-transport-layer materials.

A film formation device according to an embodiment is provided with: a substrate holder for holding a substrate in an upright position relative to the horizontal plane, the substrate having a vapor deposition surface on which a vapor-deposited film is to be formed; and an evaporation source for spraying a vapor deposition material onto the vapor deposition surface while moving relative to the substrate holder upward and/or downward, the evaporation source being disposed in a region which the vapor deposition surface of the substrate held by the substrate holder is to face. The substrate holder is configured to hold the substrate in an inclined orientation relative to the vertical plane such that the upper end of the substrate is located away from the evaporation source. The film formation device according to an embodiment is further provided with an adjustment means for reducing a variation in the thickness of a vapor-deposited film on the vapor deposition surface, which results from the inclination of the substrate.