Display panel device and method of manufacturing the same
AssigneePanasonic Corporation
InventorKenichi Nendai
Life of this patent
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Abstract
A display panel device having a structure that is more reliable than that of a conventional display panel device includes: a bank and an opening surrounded by an inclined side wall of the bank; a pixel electrode that is a first electrode layer formed on the opening of the bank; a hole injection layer and an organic EL layer that are organic functional layers formed on the first electrode layer; and a common electrode that is a second electrode layer formed on the organic functional layers, wherein the first electrode layer has (i) an end portion that is in contact with the side wall of the bank so that the end portion runs on the side wall, and (ii) a depressed portion that opens upward in a peripheral portion close to the end portion.
Claims22
A display panel device, comprising:
- a bank and an opening surrounded by an inclined side wall of said bank;
- a first electrode layer formed on said opening of said bank;
- an organic functional layer formed on said first electrode layer;
- and
- a second electrode layer formed on said organic functional layer,
- wherein said first electrode layer has (i) an end portion that is in contact with the side wall of said bank so that the end portion runs on the side wall, and (ii) a depressed portion that opens upward in a peripheral portion close to the end portion.
A method of manufacturing a display panel device, comprising:
- forming, on a base, a bank and an opening surrounded by an inclined side wall of the bank;
- forming a first electrode layer from a top surface of the bank to a bottom of the opening, using a thin film formation method;
- patterning the first electrode layer by etching so that the first electrode layer has a depressed portion that opens upward in a peripheral portion close to an end portion of the first electrode layer, the end portion of the first electrode layer being continuously in contact with the side wall of the bank;
- forming a layer above the first electrode layer so as to cover the depressed portion that opens upward;
- and
- forming a second electrode layer above the first electrode layer.
Dependencies are inferred from the claim text.