Method and apparatus for manufacturing organic EL display and color filter by ink jet method

• US 20040115339A1
• Filed: 09/18/2003
• Published: 06/17/2004
• Est. Priority Date: 09/19/2002
• Status: Abandoned Application

• Current Assignee: Dai Nippon Printing Company Limited
• Original Assignee: Dai Nippon Printing Company Limited
• Inventors: Ito, Nobuyuki
• Application Number:
  US10/666,674
• Publication Number:
  US 20040115339A1
• Time in Patent Office: Days
• US Class Current: 427/66
• CPC Class Codes: G02B 5/201 in the form of arrays
• CPC Class Codes: H10K 50/87 Arrangements for heating or cooling
• CPC Class Codes: H10K 59/12 Active-matrix OLED [AMOLED] displays
• 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 59/8794 Arrangements for heating and cooling
• CPC Class Codes: H10K 71/00 Manufacture or treatment specially adapted for the organic devices covered by this subclass
• CPC Class Codes: H10K 71/135 using ink-jet printing
• CPC Class Codes: H10K 71/40 Thermal treatment, e.g. annealing in the presence of a solvent vapour
• CPC Class Codes: H10K 85/1135 Polyethylene dioxythiophene [PEDOT]; Derivatives thereof
• CPC Class Codes: H10K 85/146 poly N-vinylcarbazol; Derivatives thereof
• CPC Class Codes: H10K 85/653 comprising only oxygen as heteroatom
• CPC Class Codes: H10K 85/6565 Oxadiazole compounds

Abstract

The object of the present invention is to provide a method and apparatus for manufacturing an EL layer of uniform thickness, causing effective light emission of pixel openings and manufacturing an organic EL display showing sufficient brightness and excellent in practicability, by an ink jet method. Further object is to provide a method and apparatus for manufacturing a color filter excellent in practicability by an ink jet method, in which a dye layer with uniform thickness is formed and optical coloring of uniform tone is conducted at pixel openings.

A method for manufacturing an organic EL display and a color filter by an ink jet method, wherein a device for increasing the temperature of a substrate by heating a stage, and for adjusting a nozzle at cooled temperature are provided to prevent poor ink discharge, and a process of discharging an ink material from a nozzle, subsequently, a process of drying the ink material discharged on a substrate is conducted, while relatively moving the substrate and nozzle. By this manufacturing method, a problem of irregular thickness of an EL layer can be solved.

Claims

1. A method for manufacturing an organic EL display by an ink jet method, wherein an uniform organic EL layer is formed by a process of discharge-placing, on a heated substrate, at least an organic EL material in the form of solution, and a process of drying the organic EL material in the form of ink, placed on the substrate, by heating.

2. The method for manufacturing an organic EL display according to claim 1, wherein the organic EL material is discharged, on a heated substrate, while controlling to a constant temperature by cooling.

3. The method for manufacturing an organic EL display according to claim 1, wherein the organic EL material is uniformly formed at a plurality of pixel openings placed in the form of two-dimensional matrix on a substrate, while relatively moving the nozzle and the substrate.

11. An electronic device using an organic EL display, as a display, manufactured by the manufacturing method according to claim 1.

4. An apparatus for manufacturing an organic EL display, comprising:

a heating temperature controlling mechanism on a stage supporting a substrate;

a nozzle cooling temperature controlling mechanism;

mechanism of discharge-placing, on a heated substrate, at least an organic EL material in the form of solution which is kept under constant temperature condition; and

a mechanism of drying the organic EL material in the form of ink, placed on the substrate, by heating.

5. The apparatus for manufacturing an organic EL display according to claim 4, wherein the nozzle cooling temperature controlling mechanism is a chiller, a Peltier element, or a combination thereof.

12. An electronic device using an organic EL display, as a display, manufactured by the manufacturing apparatus according to claim 4.

6. A method for manufacturing a color filter by an ink jet method, wherein a uniform coloring layer is formed by a process of discharge-placing, on a heated substrate, a dye material in the form of solution, and a process of drying the dye material in the form of ink, placed on the substrate, by heating.

7. The method for manufacturing a color filter according to claim 6, wherein the dye material is discharged, on a heated substrate, while controlling to a constant temperature by cooling.

8. The method for manufacturing a color filter according to claim 6, wherein the dye material is uniformly formed at a plurality of pixel openings placed in the form of two-dimensional matrix on a substrate, while relatively moving the nozzle and the substrate.

13. An electronic device using an organic EL display or liquid crystal display, as a display, using a color filter manufactured by the manufacturing method according to claim 6.

9. An apparatus for manufacturing a color filter comprising:

a heating temperature controlling mechanism on a stage supporting a substrate;

a nozzle cooling temperature controlling mechanism;

mechanism of discharge-placing, on a heated substrate, at least a dye material in the form of solution which is kept under constant temperature condition; and

a mechanism of drying the dye material in the form of ink, placed on the substrate, by heating.

10. The apparatus for manufacturing a color filter according to claim 9, wherein the nozzle cooling temperature controlling mechanism is a chiller, Peltier element, or a combination thereof, surrounding the nozzle.

14. An electronic device using an organic EL display or liquid crystal display, as a display, using a color filter manufactured by the manufacturing apparatus according to claim 9.