Patent ID: 7710028
Filing Date: 2010-05-04
Classification: H01L

Abstract:
1. An EL display device comprising: a switching transistor and a current control transistor formed over a substrate, each of the switching transistor and the current control transistor including an active layer, a gate electrode and a first insulating film between the active layer and the gate electrode; a first source wiring and a first drain wiring electrically connected to the active layer of the switching transistor; a second source wiring and a second drain wiring electrically connected to the active layer of the current control transistor; a second insulating film having a contact hole formed over the switching transistor, the current control transistor, a first source wiring, a first drain wiring, a second source wiring and the second drain wiring; a first electrode having a plurality of projecting portions formed over the second insulating film and electrically connected to one of the second source wiring and the second drain wiring through the contact hole; an EL layer formed over the first electrode; a second electrode formed over the EL layer; and a third insulating film formed over the second electrode and being in contact with an edge of the second insulating film, wherein one of the first source wiring and the first drain wiring is electrically connected to the gate electrode of the current control transistor.