Patent ID: 11919039
Assignee: BEIJING BOE TECHNOLOGY DEVELOPMENT CO., LTD.
Field: Chemical engineering (Chemistry)
Classification: CPC B | IPC B

Claim 15:
16. The method for manufacturing the acoustic transduction unit according to claim 15, wherein the step of forming a first dielectric pattern on a side of the first electrode distal to the base substrate comprises steps of:
forming a first dielectric material film on the side of the first electrode distal to the base substrate;
coating a first photoresist film on a side of the first dielectric material film distal to the first electrode, exposing the first photoresist film by using a gray tone mask, and developing the exposed first photoresist film, so as to obtain a first photoresist pattern, wherein a surface of the first photoresist pattern proximal to the first dielectric material film is a plane parallel to a plane where the base substrate is located, and a surface of the first photoresist pattern distal to the first dielectric material film is a slope surface and intersects with the surface of the first photoresist pattern proximal to the first dielectric material film;
performing a dry etching process on the first photoresist pattern and the first dielectric material film to obtain a first dielectric pattern, wherein the surface of the first dielectric pattern distal to the first electrode is a slope surface and intersects with the surface of the first dielectric pattern proximal to the first electrode.