Patent ID: 9661718
Date: 2017-05-23
CPC Classifications: H01L,H05B

Claim:
1. A method for producing an organic EL panel in which a sealing layer is interposed with no gaps between an element substrate on which an organic EL element is formed and a flat encapsulation substrate, the method comprising: an application step of independently applying a filler, a desiccant, a sealant which is composed of an ultraviolet-curable resin and is disposed so as to surround the filler and the desiccant, and a fixing agent composed of an ultraviolet-curable resin to positions on the encapsulation substrate opposing the position of the organic EL element in an inert environment in which the moisture content is less than a prescribed value, a positioning step of transporting the element substrate and the encapsulation substrate to a bonding chamber, and positioning the element substrate and the encapsulation substrate in mutually separated positions, a heating in advance step of heating at least one of a pair of surface plates formed of metal by heating means, a heating step of heating the encapsulation substrate to which the filler, the desiccant, the sealant and the fixing agent have been applied by the heated surface plate in the heating in advance step, a defoaming step of placing an inside of the bonding chamber under vacuum, and removing gases incorporated within the filler, the desiccant, the sealant and the fixing agent, a sticking substrates step of sandwiching the element substrate and the encapsulation substrate between the pair of surface plates, applying a prescribed load to the pair of surface plates to pressure weld the element substrate and the encapsulation substrate together, and controlling the load so that an internal region surrounded by the sealant is filled with the filler and the desiccant, thus forming a sealing layer of a prescribed thickness between the element substrate and the encapsulation substrate, a gas introduction step of introducing an inert gas into the bonding chamber, and returning a periphery around the pressure welded element substrate and encapsulation substrate to an atmospheric pressure environment, a provisional fixing step of irradiating ultraviolet rays from a rear surface of the surface plate on a side of the encapsulation substrate onto the fixing agent using a spot-type ultraviolet lamp after the gas introduction step, through UV transmission holes which penetrate through the surface plate and which are provided in at least one of the pair of the surface plates, thereby curing the fixing agent and provisionally fixing the element substrate and the encapsulation substrate, and a seal curing step of irradiating ultraviolet rays onto the sealant applied to the substrates that have been provisionally fixed in the provisional fixing step, thereby curing the sealant.