公开(公告)号：US06626717B2

公开(公告)日：2003-09-30

申请号：US10024209

申请日：2001-12-21

申请人： Koichi Miyashita ,  Takayoshi Kuriyama ,  Masahiko Ishii

发明人： Koichi Miyashita ,  Takayoshi Kuriyama ,  Masahiko Ishii

IPC分类号： H05B3310

CPC分类号： H01L51/56 ,  H01L51/005 ,  H01L51/0078 ,  H01L51/0081

摘要： In a manufacturing step for forming an organic EL element, the organic EL element is provided so as to have an anode and a cathode with a luminescent layer having an organic luminescent material interposed therebetween. Then, an aging treatment is performed. In the aging treatment, a curve of change in luminance with time is measured in driving the organic EL element at constant current. Then, the curve of change in luminance with time is divided into a component having a slowest luminance age-deterioration rate and other components by analyzing the curve and forming a fitting curve having a plurality of members that is fitted to the curve of change in luminance with time. Moreover, the aging treatment is conducted until a luminance of the element becomes approximately equal to an initial value A1 of the component having a slowest luminance age-deterioration rate.