Granted Patent B2

US 12,733,387 · App. 17/886,994 · Granted Sep 8, 2026

Inventor: Guojie Wang (Shenzhen, CN)

Assignee: Shenzhen China Star Optoelectronics Semiconductor Display Technology Co., Ltd.

H10K71/00H10K59/122H10K59/1201

Abstract

Claims (27)

1 . A method of manufacturing a display panel, comprising the following steps:

providing an array substrate;

manufacturing a plurality of first electrodes on the array substrate, wherein the plurality of first electrodes are arranged in an array on the array substrate, wherein a first interval is formed between adjacent first electrodes in a first direction, and wherein a second interval is formed between adjacent first electrodes in a second direction;

covering a whole layer of a negative material on the first electrodes and the array substrate;

exposing and developing the whole layer of the negative material, wherein the negative material in the first interval forms a first pixel definition layer with hydrophobicity, and wherein the negative material in the second interval forms second pixel definition layer with hydrophobicity;

exposing the first pixel definition layer again to make the first pixel definition layer hydrophilic; and

manufacturing a plurality of light-emitting layers on the first electrodes, wherein each of the light-emitting layers covers the first pixel definition layer between adjacent second pixel definition layers, and the light-emitting layer is entirely hydrophilic, wherein a whole surface of the first pixel definition layer in contact with the light-emitting layers is entirely hydrophilic;

wherein a thickness of the second pixel definition layer is greater than a thickness of the first pixel definition layer in a direction perpendicular to the array substrate.

2 . The method of manufacturing the display panel according to claim 1 , wherein the thickness of the first pixel definition layer ranges from 0.2 um to 0.5 um, and wherein the thickness of the second pixel definition layer ranges from 1 um to 2 um.

3 . The method of manufacturing the display panel according to claim 1 , wherein the thickness of the first pixel definition layer is greater than a thickness of the first electrode.

4 . The method of manufacturing the display panel according to claim 1 , wherein a thickness of the light-emitting layer is less than the thickness of the second pixel definition layer.

5 . The method of manufacturing the display panel according to claim 1 , wherein in the step of exposing the first pixel definition layer again, UV light is used to expose the first pixel definition layer again.

6 . The method of manufacturing the display panel according to claim 1 , wherein the step of exposing the first pixel definition layer again to make the first pixel definition layer hydrophilic comprises the following steps:

providing a reticle;

placing the reticle on the negative material such that an opening on the reticle corresponds to the first pixel definition layer;

exposing the first pixel definition layer again to change a material of the first pixel definition layer from hydrophobic to hydrophilic; and

removing the reticle.

7 . The method of manufacturing the display panel according to claim 6 , wherein the step of providing the reticle comprises the following steps:

providing a transparent substrate;

forming a metal layer on the transparent substrate, and etching the metal layer to form an opening on the metal layer;

forming a plurality of support columns on a side of the transparent substrate away from the metal layer to form the reticle.

8 . The method of manufacturing the display panel according to claim 7 , wherein a thickness of the support column is greater than or equal to 0.2 micrometers and less than or equal to 0.8 micrometers.

9 . The method of manufacturing the display panel according to claim 1 , wherein the thickness of the first pixel definition layer is less than a thickness of the light-emitting layer.

10 . The method of manufacturing the display panel according to claim 1 , wherein in the step of exposing and developing the whole layer of the negative material, a halftone reticle is configured to expose and develop the whole layer of the negative material.

11 . The method of manufacturing the display panel according to claim 1 , wherein a printing groove is formed between adjacent second pixel definition layers, and wherein a light-emitting material is continuously printed along an extending direction of the printing groove to form a light-emitting layer.

12 . The method of manufacturing the display panel according to claim 1 , further comprising: after the step of manufacturing the plurality of light-emitting layers,

manufacturing a plurality of second electrodes on the light-emitting layers and the second pixel definition layer.

Assignments (1)

Priority Claims (2)

Continuity (1)

References Cited (9)