Organic EL display panel manufacturing method and ink drying device
View Patent ↗A method of manufacturing an organic electroluminescence display panel includes forming pixel electrode layers in a matrix on a substrate. The method includes arranging column banks extending in a column direction above the substrate. The method includes applying ink containing organic light emitting material to gaps between the column banks so that the ink is continuous between ends of the column banks in the column direction. The method includes arranging the substrate and a rectifying plate facing each other, the rectifying plate having a uniform density of through holes, such that the rectifying plate is at a predefined distance from the column banks. The method includes exhausting gas from an environment including the substrate and the rectifying plate. The method further includes heating the substrate to dry the ink to form an organic functional layer. The method includes forming a counter electrode layer above the organic functional layer.
1. An ink drying device comprising:
a chamber for receiving a substrate having ink thereon;
a support base in the chamber for supporting the substrate;
a rectifying plate comprising a uniform density of through holes;
a support, within the chamber, for positioning the rectifying plate to face the support base such that the rectifying plate is at a predefined distance from column banks of the substrate, and each through hole of the through holes face a corresponding column bank of the column banks, wherein the support directly contacts the support base and the rectifying plate;
a unit for exhausting gas from the chamber; and
a unit for heating the substrate.
2. The ink drying device of claim 1 , wherein
a ratio of a minimum gap between the rectifying plate and the column banks and an opening length of the through holes is from 0.5 to 2.
3. The ink drying device of claim 1 , wherein
a ratio of open area of the rectifying plate to a total area of the rectifying plate to be over the substrate in a range from 20% to 60%.
4. The ink drying device of claim 1 , wherein
the rectifying plate comprises a peripheral wall surrounding a region on the rectifying plate that faces the column banks, wherein the peripheral wall is configured to surround the column banks in a plan view.
5. The ink drying device of claim 1 , wherein a ratio of open area of the rectifying plate to a total area of the rectifying plate to be over the substrate is in a range from 20% to 40%.
6. The ink drying device of claim 1 , further comprising:
a lidding mechanism capable of opening and closing all or part of the through holes.
7. The ink drying device of claim 6 , wherein the lidding mechanism is configured to partially close each of the through holes.
8. The ink drying device of claim 6 , wherein the lidding mechanism is configured to completely close each of the through holes.
9. The ink drying device of claim 1 , wherein a pitch between adjacent through holes ranges from 20 mm to 30 mm.
10. The ink drying device of claim 1 , wherein the unit comprises a pump, wherein the support base is between the pump and the rectifying plate.
11. The ink drying device of claim 1 , wherein the rectifying plate comprises a first portion configured to cover the substrate; and a second portion which is configured to be outside of the substrate in a plan view.
12. The ink drying device of claim 1 , further comprising:
a lidding mechanism movable relative to the rectifying plate.
13. The ink drying device of claim 1 , further comprising:
an ink solvent vapor between the support base and the rectifying plate.
14. An ink drying device comprising:
a chamber for receiving a substrate having ink thereon;
a support base in the chamber for supporting the substrate;
a rectifying plate comprising a uniform density of through holes;
a support, for positioning the rectifying plate to face the support base such that the rectifying plate is at a predefined distance from column banks of the substrate, wherein each through hole of the through holes face a corresponding column bank of the column banks, and the support is entirely within the chamber;
a unit for exhausting gas from the chamber;
a lidding mechanism moveable relative to the rectifying plate; and
a unit for heating the substrate,
wherein the support directly contacts the support base and the rectifying plate.
15. The ink drying device of claim 14 , wherein a ratio of open area of the rectifying plate to a total area of the rectifying plate to be over the substrate is in a range from 20% to 40%.
16. The ink drying device of claim 14 , wherein the lidding mechanism is capable of opening and closing all or part of the through holes.
17. The ink drying device of claim 14 , wherein the rectifying plate comprises a sidewall portion extending toward the support base, and the sidewall portion is outside a perimeter of the support base in a plan view.