Display panel with auxiliary electrode and manufacturing method thereof
View Patent ↗The present disclosure provides a display panel and a manufacturing method of the display panel. The display panel includes an array substrate, a first electrode, a pixel definition layer, an organic functional layer, a second electrode, a covering layer, and an auxiliary electrode. By arranging an auxiliary cathode in a non-display area and using a parallel connection of the auxiliary cathode and a cathode, a cathode resistance of devices is reduced to relieve an IR-drop phenomenon and improve a brightness uniformity of the panel. The present disclosure provides the manufacturing method of the display panel. An organic material can be patterned to form the covering layer without using a fine mask, and a metal material can be patterned to form the auxiliary electrode by utilizing characteristics of self-assembled materials, thereby reducing production costs.
1. A manufacturing method of a display panel, comprising following steps:
providing an array substrate and a mask, wherein the array substrate comprises a display area and a non-display area, the mask comprises a light transmitting area and a non-light transmitting area;
forming a first electrode on the array substrate, wherein the first electrode corresponds to the display area;
forming a pixel definition layer on the array substrate, wherein the pixel definition layer corresponds to the non-display area;
forming an organic functional layer on the first electrode and the pixel definition layer;
forming a second electrode on the organic functional layer;
vacuum evaporating an organic material on the second electrode;
setting the mask above the array substrate, wherein the light transmitting area corresponds to the non-display area, and the non-light transmitting area corresponds to the display area;
irradiating the mask with a laser, wherein light is transmitted through the light transmitting area to the organic material in the non-display area, the organic material in the non-display area absorbs high energy to sublimate into a gaseous state, gaseous molecules are condensed into a film in the light transmitting area, and the organic material in the display area forms a covering layer; and
forming an auxiliary electrode on the second electrode of the non-display area, wherein the auxiliary electrode is connected in parallel with the second electrode.
2. The manufacturing method of the display panel in claim 1 , wherein:
the step of forming the auxiliary electrode on the second electrode of the non-display area specifically comprises:
vacuum evaporating a metal material on the display area and the non-display area, wherein due to repulsion between the organic material in the display area and the metal material, the metal material spontaneously forms a film in the non-display area to form the auxiliary electrode.
3. The manufacturing method of the display panel in claim 1 , wherein:
the mask comprises:
a light transmitting substrate comprising alignment marks;
a masking layer disposed on the light transmitting substrate and corresponding to the non-light transmitting area; and
a limiting frame arranged around the light transmitting substrate and surrounding the covering layer.
4. The manufacturing method of the display panel in claim 3 , wherein:
the step of setting the mask above the array substrate comprises:
making the alignment marks of the mask correspond to alignment marks of the array substrate, wherein a side of the masking layer faces the array substrate, and the limiting frame is arranged at a periphery of the array substrate.
5. The manufacturing method of the display panel in claim 1 , wherein:
in the step of forming the pixel definition layer on the array substrate of the non-display area, a double-layered pixel definition layer is manufactured by using two yellow light processes; and
in the step of forming the organic functional layer on the first electrode and the pixel definition layer, the organic functional layer is manufactured by a method of inkjet printing.