Patent ID: 6853083

Claim:
An electroluminescence display device comprising: a substrate having an insulating surface; a first thin film transistor disposed over said substrate, wherein said first thin film transistor comprises an active layer comprising crystalline silicon including source, drain and channel regions, and a gate electrode adjacent to the channel region; a second thin film transistor disposed over said substrate, said second thin film transistor comprising an active layer comprising crystalline silicon including source, drain and channel regions, and a gate electrode adjacent to the channel region, said gate electrode of the second thin film transistor being electrically connected to said drain region of the first thin film transistor; an electrode comprising aluminum for electrically connecting a transparent electrode and said drain region of the second thin film transistor; and an electroluminescence layer comprising an organic material disposed adjacent to said transparent electrode, wherein a direct contact between said electrode and said transparent electrode and a direct contact between said electrode and said drain region of the second thin film transistor are prevented by a barrier metal layer comprising titanium interposed therebetween.