Patent ID: 6277679
Filing Date: 2001-08-21
Classification: G02B,G02F,G09G,H01L

Abstract:
A method for manufacturing an organic electroluminesence display device having a thin film transistor at a pixel comprising the steps of:forming a semiconductor layer over a transparent substrate;forming a gate insulating film on said semiconductor layer;forming a conductive film over said gate insulating film;patterning said conductive film thereby forming a pattern comprising said conductive film;adding an impurity which will be donor or acceptor into said semiconductor layer by using said pattern comprising said conductive film as a mask;applying a photoresist covering said pattern comprising said conductive film;exposing said photoresist to a light irradiated from back of said transparent substrate and developing thereby forming a photoresist pattern that is narrower than said pattern comprising said conductive film; andforming a gate electrode by patterning said pattern comprising said conductive film by using said photoresist pattern as a mask.