An electroluminescent device having an organic electroluminescent layer

Claim 1

An electroluminescent device comprising: a) a substrate having top and bottom surfaces; b) a first thin-film-transistor disposed over the top surface of said substrate, wherein said first thin-film-transistor comprises a source electrode, a drain electrode, a gate dielectric, and a gate electrode; and wherein said gate electrode comprises a portion of a gate bus; c) a second thin-film-transistor disposed over the top surface of said substrate; wherein said second thin-film-transistor comprises a source electrode, a drain electrode, a gate dielectric, and a gate electrode; wherein said gate electrode is electrically connected to said drain electrode of said first thin-film-transistor; d) a capacitor disposed over the top surface of said substrate; said capacitor comprising top and bottom electrodes (84, 72); e) a display anode layer electrically connected to said drain electrode of said second thin-film-transistor; f) a dielectric passivation layer (74) overlying said first and second thin-film-transistors and said capacitor; said dielectric passivation layer (74) having an opening over said anode layer; and further wherein said passivation layer (74) has a tapered edge (76) at said opening such that the bottom edge of said passivation layer (74) extends further over said anode layer than does the top edge of said passivation layer (74); g) an organic electroluminescent layer (82) positioned directly on the top surface of said anode layer; wherein said organic electroluminescent layer (82) is insulated from said first and second thin-film-transistors, and said capacitor, by said passivation layer (74); and h) a cathode layer positioned directly on the top surface of said organic electroluminescent layer (82).