Patent ID: 9263690
Filing Date: 2016-02-16
CPC Classification: H01L

Claim Text:
1. A manufacturing method of an organic EL device, comprising: forming a substrate, at least a first electrode layer, an organic light emitting layer, and a second electrode layer being stacked on the substrate; forming a first electrode layer separating groove that separates the first electrode layer into a plurality of small pieces; forming a light emission separating groove that separates the organic light emitting layer into a plurality of small light emitting regions; forming a unit light emitting element separating groove that has a depth extending from the second electrode layer to trench the organic light emitting layer, the unit light emitting element separating groove separating the second electrode layer into a plurality of small pieces; and forming a connection portion that penetrates through the organic light emitting layer to connect between the second electrode layer and the first electrode layer, one of the small pieces of the first electrode layer, one of the small pieces of the second electrode layer, and a portion of the organic light emitting layer therebetween structuring a unit light emitting portion, the unit light emitting portion being electrically connected in series via the connection portion, wherein a portion of the second electrode layer enters inside the light emission separating groove, whereby the connection portion is structured, the unit light emitting element separating groove being formed by a second electrode layer separating groove and a light emitting portion separating groove, the second electrode layer separating groove and the light emitting portion separating groove being each a laser groove, an average groove width of the second electrode layer separating groove being greater than an average groove width of the light emitting portion separating groove, wherein a boundary between the second electrode layer separating groove and the light emitting portion separating groove is stepwise, wherein a part of the second electrode layer extends to a unit light emitting element separating groove side and beyond the light emission separating groove, and wherein forming the unit light emitting element separating groove is accomplished by performing radiation of a laser beam from a second electrode layer side at least twice.