Hewlett-Packard Development Company, L.p.

Phil Keenan

Kevin Dooley

Pat MacDermott

Odhran Hendley

Eugene Cahill

Lorraine Byrne

Mark Loughlin

Edward Savage

Laura Annett

Declan John McCabe

Barry Fitzgerald

Fred Logue

Michelle Ryan Meleady

Maurice Byrne

Niall Stobie

Paul Colfer

Gerard Lowe

Pat Macdermott

A method of making an inkjet printhead comprises forming a first patterned layeron a surface of a first substrate, forming a second patterned layeron a surface of a second substrate, bonding the first and second layers in intimate face-to-face contact, and removing the second substratefrom the second patterned layer. The first and second patterned layerstogether define at least one ink ejection chamber having at least one ink ejection nozzle.

Method of making an inkjet printhead

A method of making an inkjet printhead comprising providing a substrate having first and second opposite surfaces, providing a support member, bonding the second surface of the substrate to the support member, and, after the substrate and support member are bonded together, forming a plurality of ink ejection elements on the first surface of the substrate, the method further including forming communicating ink supply slots passing respectively through the substrate and support member to provide fluid communication between an ink supply and the ink ejection elements.

Inkjet printheads

A hardwearing inkjet printhead comprises a substratehaving an ink ejection circuitand a patterned glass frit planarization layeron its surface. A ceramic bodyhas a substantially flat surfaceB intimately bonded to the planarization layer. The ceramic body and planarization layer together define at least one ink ejection chamberand associated ink ejection nozzlewith the nozzle and at least the major part of the height of the chamber formed in the ceramic body.

A method of manufacturing an electronic component comprising at least one n- or p-doped portion, comprising the steps of: co-depositing inorganic semi-conducting nanoparticles and dopant on a substrate, the nanoparticles being a group four element such as silicon or germanium; fusing the nanoparticles by heating to form a continuous layer; and subsequently; and, recrystallising the layer.

Methods and apparatus to form electronic components with at least one N- or P-doped portion

A method of making an inkjet printhead for surface mounting comprises providing a substratehaving a plurality of ink ejection elements and a plurality of electrical contactsformed on a first surface, the contacts being connected to the ink ejection elements to allow selective energisation of the elements. A plurality of through-holesare formed in the substrate each extending from the opposite surface of the substrate fully through the thickness of the substrate to meet the underside of a respective electrical contacton the first surface. Each through-hole is substantially completely filled with a conductive materialby electroplating. Finally, a further plurality of electrical contacts (solder mounds)are provided on the second surface of the substrate each in contact with the conductive material in a respective through-hole.

A method of making an inkjet printhead comprises forming at least one ink ejection elementon a surfaceof a substrateand forming a slotin the substrate to provide fluid communication between an ink supply and the ink ejection element. A protective coatingis applied to the surface of the substrate prior to forming the slot. The protective coating comprises a non-polymeric material which is capable of forming a covalent bond with the substrate and is removed from the substrate without damaging the ink ejection element following slot formation.

An inkjet printhead having a substrate and having at least one ink supply slot extending through the thickness thereof and providing fluid communication between an ink supply and a plurality of ink ejection elements, wherein the ink supply slot is filled to at least part of its depth with a selectively exposed and developed resist material having a plurality of ink feed holes therethrough forming a filter.

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Lucan, Ireland

Phil Keenan