Patent ID: 6072278
Filing Date: 2000-06-06
Classification: H01L,H05B

Abstract:
An electroluminescent device comprising:a substrate;a blocking transistor formed on the substrate;a first conductive layer having a portion thereof for connecting to a gate of said blocking transistor formed on said substrate;a dielectric layer formed on the first conductive layer, the dielectric layer including regions of reduced thickness and at least one sublayer having a dielectric constant of at least six, said at least one sublayer, having a range covering portion of said dielectric layer to the entire dielectric layer;a second conductive layer formed on the dielectric layer such that the first and second conductive layers have portions which form electrodes of a hold capacitor and the regions of reduced thickness provide a capacitor dielectric between the electrodes;a pixel electrode associated with and coupled to the blocking transistor; anda transparent electrode wherein an electroluminescent stack is disposed between the transparent electrode and the pixel electrode such that when the blocking transistor is activated the pixel electrode associated therewith illuminates and is maintained in an illuminated state by the hold capacitor.