| 摘要 |
PROBLEM TO BE SOLVED: To provide a technology for obtaining vapor deposition material particles containing a plurality of organic vapor deposition materials at the predetermined ratio. SOLUTION: First and second organic vapor deposition raw materials are respectively heated in vacuum, and purified by separating and removing impurities therefrom (Process P1a, Process P1b). The purified first and second organic vapor deposition raw materials are dispersed in a solvent to prepare the raw material dispersion liquid (Process P2). Further, the raw material dispersion liquid is frozen and dried in vacuum and formed into particles (Process P3). The present invention is suitable for granulation of a host material and a dopant material for forming an organic film of an organic EL element. COPYRIGHT: (C)2010,JPO&INPIT |
