PURPOSE: To provide an easy-to-watch organic EL element by keeping reflected light from a rear cathode, so as not to be transmitted outside via the installation of a circularly light-polarizing plate on a transparent electrode.
CONSTITUTION: An ITO film is formed on a glass substrate 3, and a desired pattern is applied to the film. A transparent electrode 4 is thereby formed. Thereafter, an electron hall injection layer 5 is deposited on the substrate 3 and, then, a luminous layer 6 is deposited thereon. An electron injection and transport layer 7 is, then, deposited on the luminous layer 6. At this stage, a vacuum condition is eliminated and a deposition source for both silver and magnesium is prepared. Then, a bath is again evacuated for the co-deposition of silver and magnesium, thereby forming a cathode 8. The organic EL element so formed is taken out from the vacuum bath, and sealed whenever necessary for the prevention of deterioration. Then, a circularly light-polarizing plate is bonded to a linear polarizing plate 1, so as to keep the optical axis of a phase substrate 2 at 45 degrees with the polarization axis of the polarizing plate, and the product so prepared is bonded to the substrate 3.
UCHIDA MANABU
IZUMISAWA YUSHO
