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.:
Date of Patent:
Dec. 30, 2025
Filed:
Jan. 19, 2022
Keiji Ueda, Kanagawa, JP;
Takahiko Kuroda, Hyogo, JP;
Toshiaki Masuda, Kanagawa, JP;
Kaname Morita, Kanagawa, JP;
Keiji Ueda, Kanagawa, JP;
Takahiko Kuroda, Hyogo, JP;
Toshiaki Masuda, Kanagawa, JP;
Kaname Morita, Kanagawa, JP;
RICOH COMPANY, LTD., Tokyo, JP;
Abstract
A liquid discharge head includes a nozzle layer having a nozzle through which a liquid is discharged from a second side toward a first side, a liquid chamber substrate, and a drive circuit. The nozzle layer includes a vibration layer, a piezoelectric actuator adjacent to the nozzle and over the first side, a circuit connection over the first side, a first protective layer around the circuit connection, a second protective layer over the piezoelectric actuator, a first water-resistant film over the first protective layer, and a second water-resistant film over the second protective layer. The second protective layer is separated from the first protective layer. The first protective layer defines an opening above the circuit connection. The liquid chamber substrate has a liquid chamber communicating with the nozzle. The drive circuit is disposed over the second side and connected to the circuit connection to drive the piezoelectric actuator.