公开(公告)号：US20240208213A1

公开(公告)日：2024-06-27

申请号：US18391753

申请日：2023-12-21

Applicant: ENJET CO. LTD.

Inventor： Do Young BYUN ,  Byungjik LIM ,  Shaheer MOHIUDDIN KHALIL ,  Baek Hoon SEONG ,  Jaewoo JOUNG ,  Jaeyong CHOI

IPC: B41J2/06 ,  B41J2/085 ,  B41J2/14

CPC classification number: B41J2/06 ,  B41J2/085 ,  B41J2/14

Abstract: Disclosed is an inkjet printhead. The inkjet printhead with a plurality of nozzles to eject a liquid solution by an electrohydrodynamic method includes: a first electrode formed for each of the plurality of nozzles and applied with a voltage for ejecting the liquid solution by the electrohydrodynamic method; a first voltage controller configured to apply the voltage to the first electrode; and a second electrode placed between and spaced apart from the first electrodes formed in the nozzles and grounded to inhibit electric field interference between the nozzles.

公开(公告)号：US20230286272A1

公开(公告)日：2023-09-14

申请号：US18180541

申请日：2023-03-08

Applicant: ENJET CO. LTD.

Inventor： Do Young BYUN ,  Vu Dat NGUYEN ,  Chihyun PARK ,  Byungjik LIM ,  Hyungdong LEE ,  Hyunwoong YOO ,  Jaewoo JOUNG

IPC: B41J2/14 ,  B41J2/16

CPC classification number: B41J2/14201 ,  B41J2/1623 ,  B41J2/1607 ,  B41J2002/14419

Abstract: Disclosed are an inkjet printhead and a method of manufacturing the same, the inkjet printhead including: a first layer including an inlet formed to penetrate a substrate and introduce ink therein, and a plurality of membranes; a second layer disposed beneath the first layer, and including a manifold formed to penetrate a substrate and communicate with the inlet or recessed on a top of the substrate, and a plurality of nozzle channels formed to penetrate the substrate below the membrane and allow the ink transferred from the manifold to flow therein; a third layer disposed beneath the second layer, and including a plurality of nozzles formed in a substrate and communicating the plurality of nozzle channels; a piezoelectric actuator formed on the first layer formed with the membrane, and including a lower first electrode, a piezoelectric body on the first electrode, and a second electrode on the piezoelectric body; a first voltage controller configured to oscillate the membrane by applying a pulse voltage to the first electrode and the second electrode; a third electrode disposed beneath the third layer, formed around each nozzle, and surrounded with an insulator; and a second voltage controller configured to discharge droplets of the ink based on induced electric force by applying voltage to the third electrode.