ORGANIC EL ELEMENT AND MANUFACTURING METHOD THEREOF

• US 20090284146A1
• Filed: 07/22/2009
• Published: 11/19/2009
• Est. Priority Date: 05/31/2007
• Status: Active Grant

• Current Assignee: JDI Design and Development GK
• Original Assignee: Panasonic Corporation (Panasonic Holdings Corporation)
• Inventors: KITAMURA, Yoshiro, Nagai, Hisao, Yoshida, Hidehiro, Nakatani, Shuhei
• Granted Patent: US 8,008,860 B2
• Time in Patent Office: Days
• US Class Current: 313/504
• CPC Class Codes: H10K 10/466 Lateral bottom-gate IGFETs comprising only a single gate
• CPC Class Codes: H10K 50/14 Carrier transporting layers
• CPC Class Codes: H10K 59/122 Pixel-defining structures or layers, e.g. banks
• CPC Class Codes: H10K 59/173 comprising banks or shadow masks
• CPC Class Codes: H10K 71/12 using liquid deposition, e.g. spin coating
• CPC Class Codes: H10K 85/1135 Polyethylene dioxythiophene [PEDOT]; Derivatives thereof

Abstract

An organic EL display panel having a functional layer with a uniform film thickness is provided. The organic EL display panel of the present invention contains anode electrodes set on the substrate; organic EL layers set on the anode electrodes; line-state banks defining the organic EL layers in a line-state region; second banks defining two or more regions in the line-state region. The line-state banks and the second banks contain a fluorine resin, a fluorine concentration of the fluorine resin gradually changes along a thickness direction of each of the line-state bank and the second bank, and the fluorine concentration at a top of each of the line-state bank and the second bank is higher than the fluorine concentration at a bottom surface of each of the line-state bank and the second bank.

Claims

1. An organic EL element comprising:

a substrate;

an anode electrode set on the substrate;

an organic EL layer set on the anode electrode;

a cathode electrode set on the organic EL layer; and

a bank defining the organic EL layer;

wherein

the bank contains a fluorine resin,

the fluorine concentration at a top of the bank is higher than the fluorine concentration at a bottom surface of the bank,

the bank has a forward tapered shape.

2. The organic EL element according to claim 1, wherein the fluorine concentration at the top of the bank is 5 to 10 atom % and the fluorine concentration at the bottom surface of the bank is 0 to 3 atom %.

3. The organic EL element according to claim 1, wherein the bank has a taper angle of 35 to 45.

4. The organic EL element according to claim 1, wherein an inclining surface of the bank has two inflection points.

5. An organic EL display panel comprising:

a plurality of organic EL elements according to claim 1 arranged in matrix state, wherein

the bank forms a line state bank defining a line state region on the substrate,

the organic EL layer is formed line state in the line state region.