Patent ID: 8558453

Claim:
An active matrix display device comprising a plurality of pixels arranged in matrix, each pixel comprising: a thin film transistor formed over a substrate, the thin film transistor comprising: a semiconductor film comprising a metal oxide wherein the metal includes In; a gate insulating film formed over the semiconductor film; and a gate electrode formed over the semiconductor film with the gate insulating film interposed therebetween; a first insulating film formed over the thin film transistor; a first electrode formed over the first insulating film and electrically connected to the thin film transistor; a second insulating film formed on a first portion of the first electrode wherein the second insulating film has an opening to expose a second portion of the first electrode; a light emitting layer formed over the first electrode; and a second electrode formed over the light emitting layer, wherein the first electrode includes a first metal layer and a second metal layer formed on a portion of the first metal layer, wherein the second metal layer is not formed in the second portion of the first electrode so that a side surface of the second metal layer closest to the second portion is covered by the second insulating film.