Microfluidic system with single drive signal for multiple nozzles

摘要

The present disclosure is directed to a microfluidic die that includes a plurality of heaters above a substrate, a plurality of chambers and nozzles above the heaters, a plurality of first contacts coupled to the heaters, and a plurality of second contacts coupled to the heaters. The plurality of second contacts are coupled to each other and coupled to ground. The die includes a plurality of contact pads, a first signal line coupled to the plurality of second contacts and to a first one of the plurality of contact pads, and a plurality of second signal lines, each second signal line being coupled to one of the plurality of first contacts, groups of the second signal lines being coupled together to drive a group of the plurality of heaters with a single signal, each group of the second signal lines being coupled to a remaining one of the plurality of contact pads.

主权项

1. A device, comprising:
a microfluidic die including:
a substrate;a plurality of heaters on the substrate;a plurality of nozzles aligned with the plurality of heaters;a first plurality of electrical traces, each of the first plurality of electrical traces being coupled to one of the plurality of heaters;a second plurality of electrical traces, each of the second plurality of electrical traces being coupled to one of the plurality of heaters and coupled to each other;a plurality of contact pads;a first signal line coupled to each of the second plurality of electrical traces and to a first one of the plurality of contact pads;a plurality of second signal lines, each second signal line being coupled to a subset of the second plurality of electrical traces, each of the second signal lines being configured to drive one of the subsets of the plurality of heaters with a single signal, each of the plurality of second signal lines being coupled to a remaining one of the plurality of contact pads.