Hewlett-packard Development Company, L.p.

Graeme Scott

Kevin Dooley

Richard Coull

Lorraine Byrne

Vittorio Scardaci

Iain Campbell-Brown

James Elmer Abbott, Jr

Jeffrey R Pollard

Michael Mulloy

John A Doran

Kenneth Hickey

Liam Cheevers

Pat J Reilly

Rory Jordan

Declan John O'Reilly

Noel McLoughlin

John Larkin

Seamue O'Brien

Seamus O'Brien

David Cahill

A structure for a chemical sensing device includes a plurality of recesses and a plurality of electrically conductive elements located in, and protruding from, the plurality of recesses.

Structure and method of manufacture

A water vapor sensor comprises a substrate and a film of carbon nanotubes impregnated with surfactant on the substrate. The substrate is of material which is inert relative to the film. Two or more electrical conductors are in contact with in spaced apart zones of the film, whereby the impedance of the film may be measured. The sensor is housed in housing which protects the sensor but also allows exposure of the film to water vapor.

Sensing water vapour

A method for forming a fluidic ejection device is described. The method includes depositing a first layer on a silicon wafer, the first layer including a first photoresist, and exposing, at a first energy level, a portion of the first photoresist. The method also includes depositing a second layer on the first layer, the second layer including a second photoresist that is more sensitive to light than the first photoresist, and exposing, at a second energy level, a portion of the second photoresist. The second energy level is less than the first energy level. The method also includes developing unexposed portions of the first photoresist and the second photoresist to form an enclosed firing chamber and a nozzle.

Fluidic ejection device with layers having different light sensitivities

Controlling dimensions of nanowires includes lithographically forming a trench in a layer of a polymer resin with a width less than one micrometer where the polymer resin has a thickness less than one micrometer and is deposited over an electrically conductive substrate, depositing a nanowire material within the trench to form a nanowire, and obtaining the nanowire from the trench with a removal mechanism.

Controlling dimensions of nanowires

A structure for a chemical sensing device, the structure comprising at least one electrically conductive element located in, and protruding from, at least one recess. A method of manufacturing the structure includes: (a) providing a template comprising at least one recess having a recess depth; (b) providing an electrically conductive material in the at least one recess; and (c) removing part of the template to decrease the recess depth of the at least one recess, thereby forming said protruding at least one electrically conductive element.

A dosimeter includes a platinum-ruthenium (PtRu) nanoparticle-decorated, -coated, or -deposited carbon nanostructure element. The PtRu nanoparticle-decorated carbon nanostructure element is foulably sensitive to a gas.

Dosimetry via platinum&#x2014;ruthenium nanoparticle-decorated nanostructure

A method of forming an opening through a substrate having a first side and a second side opposite the first side includes laser machining a first portion of the opening into the substrate from the second side toward the first side, and abrasive machining a second portion of the opening into the substrate. Abrasive machining the second portion of the opening into the substrate includes completing the opening through the substrate.

Method of forming substrate for fluid ejection device

A light beam is used to cut a slot in a first side of substrate. An optical sensor monitors a surface of a second side of the substrate that is opposite the first side while cutting the slot. If the light beam breaks through the surface of the second side, the sensor detects the light beam.

Monitoring slot formation in substrates

A method of laser machining a fluid slot includes directing a UV laser beam towards a substrate with microelectronics to form a slot through the substrate.

Method of laser machining a fluid slot

A method of laser machining a fluid path is provided. The method comprises directing a first laser toward a first surface, directing a second laser toward a second surface of the substrate, and directing a third laser toward the second surface along at least a portion of an edge of an area that defines a portion of the fluid path on the second surface.

Laser micromachining methods and systems

An inkjet print head ( ) includes one or more laser sources ( ). Each laser source ( ) is actuable to emit laser radiation and each laser source is associated with one or more ink chambers ( ). Each ink chamber ( ) includes a nozzle aperture ( ) through which ink is dispensed and is arranged to, in use, communicate with an ink supply. Each chamber has a membrane ( ) arranged to contact the ink in the ink chamber, the membrane being responsive to laser radiation from an associated laser source to produce an acoustic emission capable of displacing ink from the chamber.

Growing community of inventors

Maynooth, Ireland

Graeme Scott