Droplet generating device

摘要

A droplet generating device includes a wafer with a recess that defines a pressure chamber, a flexible membrane bonded to the wafer so as to cover the recess and form a wall of the pressure chamber, and an actuator attached to the membrane for flexing the membrane to generate a pressure wave in a liquid in the pressure chamber, the pressure chamber having a first port connected to a liquid supply line, and a second port connecting the pressure chamber to a nozzle, at least one of the ports being arranged adjacent to the membrane, wherein the wafer forms at least one island portion that projects into the at least one of the ports, engages the membrane and divides the port into at least two separate passages, and wherein the at least one island portion is arranged to delimit a flexing part of the membrane on a side of the at least one of the ports.

主权项

1. A droplet generating device comprising:
a wafer with a recess that defines a pressure chamber; a flexible membrane bonded to the wafer so as to cover the recess and form a wall of the pressure chamber; and an actuator attached to the membrane for flexing the membrane to generate a pressure wave in a liquid in the pressure chamber, the pressure chamber having a first port connected to a liquid supply line, and a second port connecting the pressure chamber to a nozzle, at least one of the ports being arranged adjacent to the membrane, wherein the wafer forms at least one island portion that projects into at least one of the ports, engages the membrane and divides the port into at least two separate passages, and wherein said at least one island portion is arranged to delimit a flexing part of the membrane on a side of said at least one of the ports.