Method of fabricating an integrated multicolor organic led array

• US 5,681,756 A
• Filed: 05/30/1995
• Issued: 10/28/1997
• Est. Priority Date: 05/31/1994
• Status: Expired due to Term

• Current Assignee: Universal Display Corporation
• Original Assignee: Motorola, Inc. (Motorola Solutions, Inc.)
• Inventors: Harvey, Thomas B. III, Zhu, Xiaodong T., Norman, Michael P.
• Primary Examiner(s): FOURSON III, GEORGE R
• Application Number:
  US08/452,777
• Time in Patent Office: 882 Days
• Field of Search: 437/23, 437/905, 437/1, 437/181, 148/DIG. 99, 257/89, 257/90, 257/91
• US Class Current: 438/35
• CPC Class Codes: G09F 13/22 electroluminescent electroluminescent light sources per se H05B33/00
• CPC Class Codes: H10K 50/11 characterised by the electroluminescent [EL] layers
• CPC Class Codes: H10K 59/17 Passive-matrix OLED displays
• CPC Class Codes: H10K 59/32 Stacked devices having two or more layers, each emitting at different wavelengths
• CPC Class Codes: H10K 59/35 comprising red-green-blue [RGB] subpixels
• CPC Class Codes: H10K 71/00 Manufacture or treatment specially adapted for the organic devices covered by this subclass
• CPC Class Codes: Y10S 148/099 LED, multicolor

Abstract

A method of fabricating an integrated multicolor organic LED array including providing a negative layer and patterning a plurality of different color LED organic layers, one at a time, on the negative layer to form a plurality of different color LEDs in a plurality of areas of a selected array. A first color LED organic layer is patterned on the negative layer in first areas and to define additional areas for additional LEDs laterally separated from the first color LEDs and a final color LED organic layer is deposited in final areas and on previously patterned layers to form a plurality of final color LEDs. Transparent positive contacts are then formed on the final color LED layer in the first and final areas so as to form positive contacts to the first and the final color LEDs.

Claims

1. A method of fabricating integrated multicolor organic layers for an LED array comprising the steps of:

providing an electrical contact layer having a planar surface; and

depositing a plurality of the different color LED organic semiconductor layers, one at a time, on the planar surface of the electrical contact layer to form a plurality of different color LEDs in a plurality of areas of a selected array including

patterning a first color LED organic layer of the plurality of organic layers to remain on the planar surface of the electrical contact layer in first areas and to define and expose additional areas in the selected array for additional LEDs laterally separated from the first color LEDs in the first areas, and

depositing a final color LED organic layer of the plurality of organic layers on the planar surface in defined and exposed final areas of the additional areas and on previously patterned color organic layers to form a plurality of final color LEDs in the defined and exposed final areas of the selected array.

2. A method of fabricating integrated multicolor organic layers for an LED array as claimed in claim 1 wherein the step of depositing a plurality of different color LED organic layers includes depositing the different color organic layers in order of wavelength of the color of the layer, with the longest wavelength being deposited first.