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

Claim 13:
14. A method for manufacturing the acoustic transduction unit according to claim 1, comprising steps of:
forming a first electrode on a base substrate;
forming a support pattern and a vibrating diaphragm pattern on a side of the first electrode distal to the base substrate, wherein the support pattern is located on a side of the first electrode distal to the base substrate, and the vibrating diaphragm pattern is located on a side of the support pattern distal to the first electrode, such that a vibrating cavity is surrounded by the support pattern, the first electrode and the vibrating diaphragm pattern, and the vibrating diaphragm pattern is configured to vibrate in the vibrating cavity; and
forming a second electrode on a side of the vibrating diaphragm pattern distal to the first electrode, wherein the second electrode is provided opposite to the first electrode;
wherein after the step of forming the first electrode and before the step of forming the support pattern and the vibrating diaphragm pattern, the method for manufacturing the acoustic transduction unit further comprises:
forming a first dielectric pattern on a side of the first electrode distal to the base substrate, wherein the first dielectric pattern is located at the bottom of the vibrating cavity and comprises a first vertex located at the bottom of the vibrating cavity; a thickness of the first dielectric pattern gradually increases from the first vertex to an edge of the first dielectric pattern; and/or,
while forming the support pattern and the vibrating diaphragm pattern, the method for manufacturing the acoustic transduction unit further comprises:
forming a second dielectric pattern located at the top of the vibrating cavity and comprising a second apex located at the top of the vibrating cavity; wherein a thickness of the second dielectric pattern gradually increases from the second vertex to an edge of the second dielectric pattern.