Fabrication method of an organic electroluminescent devices

A method for manufacturing an organic electroluminescent device including a plurality of organic electroluminescent (EL) elements and a plurality of organic field effect transistors to drive thereof comprising the steps of:

• forming a semitransparent electrode layer of the organic EL element and a gate electrode of the organic transistor on a same transparent plastic substrate, being of the space-apart distance between said adjacent electrodes;
• depositing an organic gate insulating layer on the gate electrode of the organic transistor;
• forming an organic semiconductor layer used as an active layer of the transistor on the organic gate insulating layer;
• forming a source and drain electrodes on the organic semiconductor layer, wherein one terminal of the drain electrode is electrically connected to the semitransparent electrode layer of the organic EL element;
• forming an organic electroluminescent layer on the semitransparent electrode layer of the EL element and a part of the drain electrode of the organic transistor;
• and
• forming an upper electrode on the organic electroluminescent layer.