The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 11818955 B1

Date of Patent:

Nov. 14, 2023

Filed:

Aug. 26, 2021

Method for forming piezoelectric films on surfaces of arbitrary morphologies

Applicant:

City University of Hong Kong, Hong Kong, CN;

Inventors:

Zhengbao Yang, Hong Kong, CN;

Shiyuan Liu, Hong Kong, CN;

Assignee:

City University of Hong Kong, Hong Kong, CN;

Attorney:

S&F/WEHRW

Primary Examiner:

Erica S Lin

Int. Cl.

CPC ...

H10N 30/00 (2023.01); H10N 30/045 (2023.01); H10N 30/078 (2023.01); H10N 30/88 (2023.01); H10N 30/853 (2023.01);

U.S. Cl.

CPC ...

H10N 30/10513 (2023.02); H10N 30/045 (2023.02); H10N 30/078 (2023.02); H10N 30/883 (2023.02); H10N 30/8536 (2023.02);

Abstract

The present disclosure provides a method for forming piezoelectric films on surfaces of arbitrary morphologies. The method includes providing a sol for forming the piezoelectric film; spraying the sol onto the surface thereby forming a liquid film containing the sol on the surface; wiping the liquid film with a flattening tool for flattening the liquid film; drying the flattened liquid film thereby forming a gel layer; and annealing the gel layer thereby forming the piezoelectric film. The piezoelectric films with high uniformity and desired thickness can be formed on curved and even wrinkled surfaces by the present method.

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