Patent ID: 7595503

Claim:
A control element for an organic electro-luminescent display, the control element comprising: a first transistor having a first gate electrode electrically connected to a scan line, a first source/drain electrode electrically connected to a data line and a second source/drain electrode; a second transistor having a second gate electrode electrically connected to the second source/drain electrode, a third source/drain electrode electrically connected to a working voltage and a fourth source/drain electrode electrically connected to a light emitting diode; the first and second transistors also having gate dielectrics; a capacitor having a bottom electrode electrically connected to a reference voltage and an upper electrode electrically connected to the second gate electrode; and an etching stop layer formed on sidewalls of the gate dielectrics; and the etching stop layer also formed on both a channel of the first transistor and a channel of the second transistor and filling a first gap between the bottom electrode of the capacitor and the first gate electrode of the first transistor, wherein a material of the etching stop layer is the same as a material of a dielectric layer of the capacitor.