Organic electroluminescent display panel and its manufacturing method
OwnerKenichi Nagayama, Kunihiko Shirahata +1inventors
InventorsKenichi Nagayama, Kunihiko Shirahata, Takayuki Kitajima
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Abstract
A new organic EL display panel comprises transparent electrodes 2, an insulating layer 7, an organic luminous layer 4 and backside electrodes 5 successively laid on a transparent substrate 1. The insulating layer 7 is converted from a positive novolac, negative cyclized rubber or chemical amplified photoresist layer shaped to a grate pattern, by baking treatment to remove water and a solvent from the photoresist layer. Electric resistance of the insulating layer 7 is good enough to inhibit leakage of an electric current between the electrodes 2 and 5. The EL display panel reproduces a distinct image over a long term without growth of dark spots.
Claims6
An organic electroluminescent display panel comprising:
- transparent electrodes with a striped pattern laid on a transparent substrate,
- an insulating layer with a grate pattern, which converted from a photoresist by baking treatment, laid on said transparent electrode, optionally with a cathode separator formed thereon,
- an organic luminous layer deposited on said transparent electrodes through apertures of said insulating layer, and
- backside electrodes, which has a striped pattern extending along a direction crossing said transparent electrodes, laid on said organic luminous layer,
A method of manufacturing an organic electroluminescent display panel, comprising the steps of:
- providing a transparent substrate on which transparent electrodes are formed in a striped pattern,
- applying a positive novolac, negative cyclized rubber or chemical amplified photoresist to said transparent substrate,
- shaping the photoresist layer to a grate pattern,
- converting said photoresist layer to an insulating layer free from water or a solvent by baking said photoresist layer,
- optionally laying a cathode separator on said insulating layer, and
- successively depositing an organic luminous layer and backside electrodes on said transparent electrodes through apertures of said insulating layer.
Dependencies are inferred from the claim text.