Back to results
US 7,733,015 B2Granted
Organic electroluminescent display device having a planarizing layer and manufacturing method thereof
AssigneeCanon Kabushiki Kaisha
InventorKeishi Saito
Life of this patent
Estimating the term…
Abstract
The present invention provides an organic EL display device having a planarizing layer, which is prevented from being distorted. The above organic EL display device has a planarizing layer, which retains 5% or less the oligomer used to form this layer.
Claims8
An organic EL display device comprising:
- light-emitting elements each having a laminate comprising a lower electrode, an organic layer comprising at least a light-emitting layer, and an upper electrode;
- switching elements for controlling light emission and non-light emission of the light-emitting elements;
- and
- a planarizing layer, which is disposed over the switching elements and under the lower electrodes,
- wherein the planarizing layer comprises a polymer formed by polymerizing at least one oligomer such that the planarizing layer retains not more than 5% by weight of the at least one oligomer in a non-polymerized form.
2 more elements
A method for manufacturing an organic EL display device, comprising the steps of:
- forming a planarizing layer over switching elements disposed on a substrate;
- and
- forming lower electrodes of light-emitting elements each having a laminate comprising a lower electrode, an organic layer comprising at least a light-emitting layer, and an upper electrode,
- wherein the step of forming a planarizing layer comprises disposing at least one oligomer having a molecular weight of 500 to 5,000 and polymerizing the at least one oligomer such that the planarizing layer retains not more than 5% of the at least one oligomer in a non-polymerized form.
1 more element
Dependencies are inferred from the claim text.