Hewlett-packard Development Company, L.P.

Debora J Thomas

Jeffrey Allen Nielsen

Dennis Raymond Esterberg

Christie Dudenhoefer

Gary G Lutnesky

Roberto A Pugliese

Craig Olbrich

Kathryn H Cyr

Diane R Hammerstad

Kevin Francis Peters

Benjamin L Clark

Matthew C Still

Jeremy Hartan Donaldson

In one example in accordance with the present disclosure, a fluid ejection die is described. The fluid ejection die includes a fluid feed slot to deliver fluid from a reservoir to an array of ejection chambers fluid connected to the fluid feed slot. Each ejection chamber includes at least one fluid actuator and an opening through which fluid is to be ejected. The fluid ejection die also includes a number of antechambers. An antechamber includes sidewalls that curve inward.

Fluid ejection die with antechamber sidewalls that curve inward

In one example in accordance with the present disclosure, a fluidic die is described. The fluidic die includes a plurality of ejection subassemblies. Each ejection subassembly includes an ejection chamber to hold a volume of fluid and an opening through which the volume of fluid is ejected via a fluid actuator. A pitch of the ejection subassemblies aligns with a spatial arrangement of nanowells in an array of nanowells on a substrate.

Ejection subassembly pitches to match nanowell spacing

An alignment system, in an example, may include a substrate comprising at least one nanowell, at least one fluid ejection device comprising at least one die, the at least one die comprising as least one nozzle, and an alignment device to align the at least one nozzle to the at least one nanowell.

Alignment devices

An example device includes a first microfluidic channel in communication with a fluid reservoir to receive cell-containing fluid from the fluid reservoir. The device further includes a second microfluidic channel in communication with the fluid reservoir to receive cell-containing fluid from the fluid reservoir. The device further includes a first sensor disposed at the first microfluidic channel, a second sensor disposed at the second microfluidic channel, a first dispense nozzle disposed at an end of the first microfluidic channel, and a second dispense nozzle disposed at an end of the second microfluidic channel. The first microfluidic channel is shaped to convey cells of a first size range, and the second microfluidic channel is shaped to convey cells of a second size range that is different from the first size range.

Microfluidic channels to convey cells of different sizes

Printer cassette

Cassette

The present invention is embodied in a method for precisely dispensing fluid, including treating an orifice of a fluid dispensing apparatus during a fabrication process by applying a low surface energy material layer onto the orifice, adjusting a thickness of the low surface energy material coating to a predetermined threshold and limiting backpressure of a low dead volume fluid delivery system coupled to the orifice to reduce interference or interruptions for precisely dispensing the fluid.

Fluid dispenser with low surface energy orifice layer for precise fluid dispensing

A liquid dispenser cassette includes a frame, dispense head assemblies, and a one-piece integrated slot extender. The frame defines openings. The dispense head assemblies are mounted on the frame. The dispense head assemblies include dispense head dies at least partially exposed through the corresponding openings. The dispense head dies defines top slots. The slot extender is mounted on the dispense head assemblies. The slot extender has reservoirs defining drain openings mated to the corresponding top slots.

Growing community of inventors

Corvallis, OR, United States of America

Debora J Thomas