Patent ID: 11882729
Assignee: HEFEI BOE JOINT TECHNOLOGY CO., LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 9:
10. A method for manufacturing a display substrate, comprising:
forming a pixel driving circuit located in each sub-pixel in a display area on a base; the pixel driving circuit including a first storage capacitor and a second storage capacitor connected in parallel; the first storage capacitor including a first storage electrode and a second storage electrode that are disposed oppositely, and the second storage capacitor including the second storage electrode and a third storage electrode disposed opposite to the second storage electrode; wherein the second storage electrode is located between the first storage electrode and the third storage electrode in a thickness direction of the base; the first storage electrode is electrically connected to the third storage electrode, and is located at a side of the second storage electrode away from the base; and the first storage electrode, the second storage electrode, and the third storage electrode are all transparent electrodes; and
forming a bottom-emission light-emitting device in the sub-pixel on the base, the bottom-emission light-emitting device being located on a side of the pixel driving circuit away from the base; and the light-emitting device including a first electrode electrically connected to the pixel driving circuit, and the first storage electrode serving as the first electrode;
wherein the pixel driving circuit further includes a first transistor, and the first transistor is a driving transistor; the first transistor includes a first gate, a first semiconductor active pattern, and a first source; the first semiconductor active pattern includes a first channel portion, a first source portion and a first drain portion, and electrical conductivities of the first source portion and the first drain portion are greater than an electrical conductivity of the first channel portion; and the first source is in contact with the first source portion; and
forming the pixel driving circuit further includes:
simultaneously forming the third storage electrode in a process of forming the first semiconductor active pattern, so that the third storage electrode and the first drain portion are connected to each other, and are of an integral structure.