Organic EL element having forward tapered banks containing fluorine resin and manufacturing method thereof

• US 8,217,573 B2
• Filed: 02/25/2011
• Issued: 07/10/2012
• Est. Priority Date: 05/31/2007
• Status: Active Grant

• Current Assignee: JDI Design and Development GK
• Original Assignee: Panasonic Corporation (Panasonic Holdings Corporation)
• Inventors: Yoshida, Hidehiro, Kitamura, Yoshiro, Nakatani, Shuhei, Nagai, Hisao
• Primary Examiner(s): Roy, Sikha
• Application Number:
  US13/035,024
• Publication Number:
  US 20110140596A1
• Time in Patent Office: 501 Days
• Field of Search: None
• US Class Current: 313/506
• 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 element having a functional layer with a uniform film thickness is provided. The organic EL element of the present invention contains 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 having a forward tapered shape, which define the organic EL layer. 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, and a height of the top of the bank from the substrate is 0.8 to 1.2 μm.

Claims

1. A top emission type organic EL display panel comprising:

a substrate;

anode electrodes set on the substrate;

hole transport layers set on the anode electrodes, the hole transport layers containing tungsten oxide, molybdenum oxide, vanadium oxide, or a combination thereof;

organic EL layers set on the hole transport layers;

transparent cathode electrodes set on the organic EL layers; and

a plurality of linear banks having a forward tapered shape, which define the organic EL layers;

wherein;

the plurality of linear banks contain a fluorine resin,

a fluorine concentration at a top of the plurality of linear banks is higher than a fluorine concentration at a bottom surface of the plurality of linear banks, and

a height of the top of the plurality of linear banks from the substrate is 0.8 to 1.2 μ

m.

2. The top emission type organic EL display panel according to claim 1, wherein the fluorine concentration at the top of the plurality of linear banks is 5 to 10 atom % and the fluorine concentration at the bottom surface of the plurality of linear banks is 0 to 3 atom %.

3. The top emission type organic EL display panel according to claim 1, further comprising thin film transistors each including a source electrode or a drain electrode, wherein:

the anode electrodes are connected with respective thin film transistors at the source electrode or the drain electrode.