公开(公告)号：US20230112999A1

公开(公告)日：2023-04-13

申请号：US18064829

申请日：2022-12-12

Applicant: STMICROELECTRONICS S.r.l.

Inventor： Domenico GIUSTI ,  Andrea Nicola COLECCHIA ,  Gaetano SANTORUVO

IPC: B41J2/03

Abstract: A microfluidic device for continuous ejection of fluids includes: a semiconductor body that laterally delimits chambers; an intermediate structure which forms membranes each delimiting a top of a corresponding chamber; and a nozzle body which overlies the intermediate structure. The device includes, for each chamber: a corresponding piezoelectric actuator; a supply channel which traverses the intermediate structure and communicates with the chamber; and a nozzle which traverses the nozzle body and communicates with the supply channel. Each actuator is configured to operate i) in a resting condition such that the pressure of a fluid within the corresponding chamber causes the fluid to pass through the supply channel and become ejected from the nozzle as a continuous stream, and ii) in an active condition, where it causes a deformation of the corresponding membrane and a consequent variation of the pressure of the fluid, causing a temporary interruption of the continuous stream.

公开(公告)号：US20200369023A1

公开(公告)日：2020-11-26

申请号：US16882215

申请日：2020-05-22

Applicant: STMICROELECTRONICS S.R.L.

Inventor： Domenico GIUSTI ,  Andrea Nicola COLECCHIA ,  Gaetano SANTORUVO

IPC: B41J2/03 ,  H01L41/09 ,  H01L41/314 ,  H01L27/20

Abstract: A microfluidic device for continuous ejection of fluids includes: a semiconductor body that laterally delimits chambers; an intermediate structure which forms membranes each delimiting a top of a corresponding chamber; and a nozzle body which overlies the intermediate structure. The device includes, for each chamber: a corresponding piezoelectric actuator; a supply channel which traverses the intermediate structure and communicates with the chamber; and a nozzle which traverses the nozzle body and communicates with the supply channel. Each actuator is configured to operate i) in a resting condition such that the pressure of a fluid within the corresponding chamber causes the fluid to pass through the supply channel and become ejected from the nozzle as a continuous stream, and ii) in an active condition, where it causes a deformation of the corresponding membrane and a consequent variation of the pressure of the fluid, causing a temporary interruption of the continuous stream.

公开(公告)号：US20210346906A1

公开(公告)日：2021-11-11

申请号：US17381079

申请日：2021-07-20

Applicant: STMICROELECTRONICS S.R.L.

Inventor： Domenico GIUSTI ,  Andrea Nicola COLECCHIA ,  Claudio CRIPPA

IPC: B05B17/00 ,  B41J2/14 ,  B05B1/14 ,  B05B9/00 ,  B05B9/03

Abstract: A microfluidic device provided in a body accommodating a fluid containment chamber. A fluidic access channel and a drop emission channel are formed in the body and are in fluidic connection with the fluid containment chamber to form a fluidic path towards the body outside through a nozzle having an outlet section. An actuator is operatively coupled to the fluid containment chamber and is configured to cause ejection of fluid drops through the drop emission channel in an operating condition of the microfluidic device. The drop emission channel comprises a portion of reduced section having a smaller area than the outlet section of the nozzle.

公开(公告)号：US20180141074A1

公开(公告)日：2018-05-24

申请号：US15601623

申请日：2017-05-22

Applicant: STMICROELECTRONICS S.R.L.

Inventor： Domenico GIUSTI ,  Andrea Nicola COLECCHIA ,  Claudio CRIPPA

IPC: B05B17/00 ,  B05B9/00 ,  B05B9/03 ,  B05B1/14

CPC classification number: B05B17/0646 ,  B05B1/14 ,  B05B9/002 ,  B05B9/03 ,  B41J2/1433

Abstract: A microfluidic device provided in a body accommodating a fluid containment chamber. A fluidic access channel and a drop emission channel are formed in the body and are in fluidic connection with the fluid containment chamber to form a fluidic path towards the body outside through a nozzle having an outlet section. An actuator is operatively coupled to the fluid containment chamber and is configured to cause ejection of fluid drops through the drop emission channel in an operating condition of the microfluidic device. The drop emission channel comprises a portion of reduced section having a smaller area than the outlet section of the nozzle.