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US 2016/0107445 A1Published application
Microfluidic die with multiple heaters in a chamber
AssigneeSTMicroelectronics S.r.l.
InventorsDomenico Giusti, Daniele Prati
Life of this patent
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Abstract
The present disclosure is directed to a microfluidic die that includes a first larger heater and a second smaller heater is a single chamber. The first heater is configured to form a primary bubble that ejects fluid from a nozzle associated with the chamber. The second heater is configured to form a secondary bubble to prevent blow back caused when the primary bubble bursts and ejects fluid from the nozzle. The first and second heater may be coupled to a single input trace and a single ground trace.
Claims17
A method, comprising:
- ejecting fluid from a chamber through a nozzle in a microfluidic die;
- minimizing blow back of the fluid into a channel from the chamber, the minimizing including:
- activating a first heater and a second heater, the second heater being positioned closer to the channel than the first heater.
A system, comprising:
- a microfluidic die that includes:
- a substrate;
- a plurality of first heaters;
- a plurality of second heaters;
- a plurality of chambers on the substrate, each chamber being aligned with one of the first heaters and one of the second heaters;
- and
- a number of contact pads, the number of contact pads being smaller than the number of chambers.
4 more elements
A device, comprising:
- a substrate;
- a plurality of pairs of chambers on the substrate, each chamber being aligned with a first heater and a second heater;
- and
- a plurality of contact pads on the substrate, a number of the contact pads being smaller than a number of the chambers.
1 more element
Dependencies are inferred from the claim text.