John Richard Harmon

US Patent:

6336714, Jan 8, 2002

Filed:

Aug 27, 1999

Appl. No.:

09/384817

Inventors:

Naoto A. Kawamura - Corvallis OR
Colin C. Davis - Corvallis OR
Timothy L. Weber - Corvallis OR
Kenneth E. Trueba - Philomas OR
John Paul Harmon - Albany OR
David R. Thomas - Corvallis OR

Assignee:

Hewlett-Packard Company - Palo Alto CA

International Classification:

B41J 205

US Classification:

347 65

Abstract:

Described herein is a monolithic printhead formed using integrated circuit techniques. Thin film layers, including ink ejection elements, are formed on a top surface of a silicon substrate. The various layers are etched to provide conductive leads to the ink ejection elements. At least one ink feed hole is formed through the thin film layers for each ink ejection chamber. A trench is etched in the bottom surface of the substrate so that ink can flow into the trench and into each ink ejection chamber through the ink feed holes formed in the thin film layers. The trench completely etches away portions of the substrate near the ink feed holes so that the thin film layers form a shelf in the vicinity of the ink feed holes. In one embodiment, the shelf supports the ink ejection elements. An orifice layer is formed on the top surface of the thin film layers to define the nozzles and ink ejection chambers.

US Patent:

6354694, Mar 12, 2002

Filed:

Feb 19, 1999

Appl. No.:

09/252737

Inventors:

Timothy L. Weber - Corvallis OR
John P. Harmon - Albany OR
S. Dana Seccombe - Foster City CA
Colin C. Davis - Corvallis OR
Paul J. McClellan - Salem OR
David J. Waller - Corvallis OR

Assignee:

Hewlett-Packard Company - Palo Alto CA

International Classification:

B41J 214

US Classification:

347 48, 347 47

Abstract:

A method and apparatus for improving ink-jet print quality uses a print head having an array using a plurality of nozzles in sets in each drop generator mechanism. Where a conventional ink-jet pen fires a single droplet of ink at a pixel per firing cycle, the present invention fires a plurality of droplets at different subdivisions of pixels. The particular array design may vary from ink-to-ink or pen-to-pen. Each drop generator of a print head array includes a plurality of nozzles wherein each of the nozzles has an exit orifice with an areal dimension, and produces an ink droplet that produces a dot on adjacent print media wherein the dot has an areal dimension, less than the areal dimension of a pixel to be printed. Dots are printed in a pattern for each pixel wherein print quality is achieved that approximates a higher resolution print made by conventional ink-jet methodologies.

US Patent:

6402972, Jun 11, 2002

Filed:

May 19, 1999

Appl. No.:

09/314551

Inventors:

Timothy L. Weber - Corvallis OR
Kenneth E. Trueba - Barcelona, ES
John Paul Harmon - Albany OR

Assignee:

Hewlett-Packard Company - Palo Alto CA

International Classification:

B41J 204

US Classification:

216 27, 438 21, 347 65, 347 68

Abstract:

An ink jet print head having a substrate with an upper surface, and an ink supply conduit passing through the substrate. An array of independently addressable ink energizing elements are attached to the upper surface of the substrate. An orifice layer has a lower surface conformally connected to the upper surface of the substrate, and has an exterior surface facing away from the substrate. The orifice layer defines a plurality of firing chambers providing communication to the ink energizing elements, and each of the orifices is positioned in registration with a respective single ink energizing element. The exterior surface defines a plurality of nozzle apertures, each providing the upper terminus of a single firing chamber. Each of the firing chambers is laterally separated from all other firing chambers by a septum portion of the orifice layer.

US Patent:

6543884, Apr 8, 2003

Filed:

Aug 27, 1999

Appl. No.:

09/384814

Inventors:

Naoto A. Kawamura - Corvallis OR
Colin C. Davis - Corvallis OR
Timothy L. Weber - Corvallis OR
Kenneth E. Trueba - Philomas OR
John Paul Harmon - Albany OR
David R. Thomas - Corvallis OR

Assignee:

Hewlett-Packard Company - Palo Alto CA

International Classification:

B41J 205

US Classification:

347 65, 347 71

Abstract:

Described herein is a monolithic printhead formed using integrated circuit techniques. Thin film layers, including ink ejection elements, are formed on a top surface of a silicon substrate. The various layers are etched to provide conductive leads to the ink ejection elements. At least one ink feed hole is formed through the thin film layers for each ink ejection chamber. A trench is etched in the bottom surface of the substrate so that ink can flow into the trench and into each ink ejection chamber through the ink feed holes formed in the thin film layers. An orifice layer is formed on the top surface of the thin film layers to define the nozzles and ink ejection chambers. A phosphosilicate glass (PSG) layer, providing an insulation layer beneath the resistive layers, is etched back from the ink feed holes and is protected by a passivation layer to prevent the ink from interacting with the PSG layer. Other layers may also be protected from the ink by being etched back.

US Patent:

6918657, Jul 19, 2005

Filed:

Jan 30, 2003

Appl. No.:

10/356287

Inventors:

Naoto A. Kawamura - Corvallis OR, US
Colin C. Davis - Corvallis OR, US
Timothy L. Weber - Corvallis OR, US
Kenneth E. Trueba - Philomas OR, US
John Paul Harmon - Albany OR, US
David R. Thomas - Corvallis OR, US

Assignee:

Hewlett-Packard Development Company, L.P. - Houston TX

International Classification:

B41J002/05

US Classification:

347 65

Abstract:

Described herein is a monolithic printhead formed using integrated circuit techniques. Thin film layers, including ink ejection elements, are formed on a top surface of a silicon substrate. The various layers are etched to provide conductive leads to the ink ejection elements. At least one ink feed hole is formed through the thin film layers for each ink ejection chamber. A trench is etched in the bottom surface of the substrate so that ink can flow into the trench and into each ink ejection chamber through the ink feed holes formed in the thin film layers. An orifice layer is formed on the top surface of the thin film layers to define the nozzles and ink ejection chambers. A phosphosilicate glass (PSG) layer, providing an insulation layer beneath the resistive layers, is etched back from the ink feed holes and is protected by a passivation layer to prevent the ink from interacting with the PSG layer. Other layers may also be protected from the ink by being etched back.

US Patent:

6997538, Feb 14, 2006

Filed:

May 15, 2000

Appl. No.:

09/571959

Inventors:

Naoto Kawamura - Corvallis OR, US
John Paul Harmon - Albany OR, US

Assignee:

Hewlett-Packard Development Company, L.P. - Houston TX

International Classification:

B41J 2/015

US Classification:

347 21, 347 34, 347 28

Abstract:

An inkjet printer includes a printhead having a plurality of ink orifices formed therein. During printing, ink drops are ejected through the ink orifices into a print zone between the printhead and a print medium. An air current disruption system directs an air stream through the print zone as the ink drops are ejected so as to disrupt air currents acting on the ink drops during printing and prevent print defects caused by the air currents. The air stream, however, does not disrupt an intended trajectory of the ink drops during printing.

US Patent:

7454221, Nov 18, 2008

Filed:

Jul 12, 2005

Appl. No.:

11/179260

Inventors:

James C. McKinnell - Salem OR, US
John Paul Harmon - Albany OR, US

Assignee:

Hewlett-Packard Development Company, L.P. - Houston TX

International Classification:

H04B 7/00
H04B 1/28

US Classification:

455514, 455333, 4555501

Abstract:

An amplification apparatus is disclosed. The amplification apparatus includes a plurality of emitters formed on a first substrate, an anode formed adjacent to a second substrate, so that current can be conducted between the emitters of the first substrate and the anode of the second substrate. A lens is formed adjacent to the emitters for controlling a magnitude of the current, thereby providing amplification of a signal applied to the lens. An inter-substrate material connects the first substrate and the second substrate, forming a vacuum that includes the emitters, the anode and the lens. Either the first substrate or the second substrate includes solid state memory. An alternate embodiment includes a storage medium for receiving an electron beam from the electron emitter, the storage medium having a storage area, the storage area being in one of a plurality of states as determined by an electron beam generated by the electron emitter.

US Patent:

7541219, Jun 2, 2009

Filed:

Jul 2, 2004

Appl. No.:

10/884839

Inventors:

Donald J. Milligan - Corvallis OR, US
Kenneth J. Abbott - Corvallis OR, US
John Paul Harmon - Albany OR, US

Assignee:

Seagate Technology LLC - Scotts Valley CA

International Classification:

H01L 21/00
H01L 21/44
H01L 21/48
H01L 21/50

US Classification:

438117, 438 52, 438 54

Abstract:

A mass storage device includes a probe that has a cantilever having a first end region operatively connected to a substrate and a second end region rotated in a direction such that the second end region is opposed to the first end region. A tip is disposed on the second end region, with the tip pointing in a direction opposed to the first end region.