Organic EL device and method for manufacturing same

• US 6,414,432 B1
• Filed: 02/10/2000
• Issued: 07/02/2002
• Est. Priority Date: 02/15/1999
• Status: Expired due to Fees

• Current Assignee: Futaba Corporation
• Original Assignee: Futaba Corporation
• Inventors: Hieda, Shigeru, Ogawa, Yukio
• Primary Examiner(s): O'Shea, Sandra
• Assistant Examiner(s): Alavi, Ali
• Application Number:
  US09/501,191
• Time in Patent Office: 873 Days
• Field of Search: 313/505, 313/509, 313/506, 313/504, 428/917
• US Class Current: 313/506
• CPC Class Codes: H10K 50/805 Electrodes
• CPC Class Codes: H10K 59/10 OLED displays
• CPC Class Codes: H10K 59/173 comprising banks or shadow masks
• CPC Class Codes: H10K 59/805 Electrodes
• CPC Class Codes: Y10S 428/917 Electroluminescent

Abstract

An organic EL device capable of ensuring reliable and easy insulation between electrodes during patterning of the electrodes. The organic EL device includes an organic EL layer including a luminous layer and arranged between anodes and cathodes, as well as electrode separation sections arranged so as to separate the anodes from each other while insulating them from each other. The electrode separation sections each include a plurality of insulating ribs juxtaposed to each other at predetermined intervals and arranged on the anodes or in proximity to a periphery of the,anodes. This permits the interval between the ribs juxtaposed to each other to prevent the material for the second electrodes from advancing through the top surface of the ribs to the side surface thereof, to thereby ensure positive insulation between the second electrodes.

Claims

1. An organic EL device comprising:

a substrate;

first electrodes and second electrodes arranged on said substrate;

at least one of said first electrodes and second electrodes being formed to be transparent;

an organic EL layer including a luminous layer and arranged on said first electrodes;

said second electrodes being arranged on said organic EL layer and

a plurality of insulating ribs arranged so as to separate said second electrodes from each other while insulating said second electrodes from each other, each of said insulating ribs being split into at least two pieces and juxtaposed to each other at predetermined intervals.

2. An organic EL device as defined in claim 1, wherein said ribs each have an aspect ratio in section thereof set to be 1 to 5.

3. An organic EL device as defined in claim 1 or 2, wherein said ribs are so formed that upper ends of side walls thereof opposite to each other respectively project in directions opposite to each other.

4. An organic EL device as defined in any one of claims 1 to 3, wherein said first electrodes and second electrodes are arranged in a stripe-like and so as to define a matrix in cooperation with each other;

and

said ribs each are arranged between said second electrodes.

5. An organic EL device as defined in any one of claims 1 to 3, wherein said first electrodes and second electrodes each are arranged in a predetermined pattern;

and

said ribs are arranged around said second electrodes to which a voltage are concurrently applicable.

6. An organic EL device as defined in any one of claims 1 to 5, further comprising an insulating layer formed on said substrate and around said first electrodes so as to expose a desired luminous section.

7. A method for producing an organic EL device, comprising the steps of:

providing an insulating substrate;

forming first electrodes on said insulating substrate;

forming a plurality of ribs on said first electrodes for defining electrode separation sections on said EL device, each of said ribs being split into at least two pieces and spaced from each other at predetermined intervals;

laminating an organic EL layer including a luminous layer on said first electrodes from above said ribs; and

depositing second electrodes on said organic EL layer from above sad ribs.