John Frederick Turner
Engineers in Corvallis, OR

License number

Colorado 26851

Issued Date

Feb 26, 1990

Renew Date

Mar 1, 2002

Expiration Date

Feb 29, 2004

Type

Professional Engineer

Address

PO Box 428, Corvallis, OR 97339

Professional information

Co-Director At Osu Venture Accelerator

Position:

Co-director, OSU Venture Accelerator at Oregon State University, Faculty, College of Business at Oregon State University

Location:

Corvallis, Oregon Area

Industry:

Higher Education

Work:

Oregon State University - Corvallis, Oregon Area since Dec 2012 - Co-director, OSU Venture Accelerator Oregon State University since 2005 - Faculty, College of Business Microflow CVO Inc - Corvallis, Oregon Area Oct 2011 - Dec 2012 - CEO Hewlett-Packard 1995 - 2005 - Manager- Printing and Imaging Division Hewlett-Packard Labs 1984 - 1995 - Scientist Lawrence Berkeley National Laboratory 1982 - 1984 - Post Doctoral Researcher

Education:

University of California, San Diego 1976 - 1982
M.S., PhD, Physics University of Illinois at Urbana-Champaign 1972 - 1976
B.S., Engineering Physics

Thin-Film Print Head For Thermal Ink-Jet Printers

US Patent:

6132032, Oct 17, 2000

Filed:

Aug 13, 1999

Appl. No.:

9/373827

Inventors:

Frank R. Bryant - Denton TX
John E. Turner - Corvallis OR

Assignee:

Hewlett-Packard Company - Palo Alto CA

International Classification:

B41J 205

US Classification:

347 59

Abstract:

A thin-film print head is provided that includes at least one MOSTFT transistor, at least one resistor, a conductive line between the transistor and resistor. External interconnects between the internal circuitry of print head and external driver circuitry are provided. The thin-film print head device is adjacent to an ink barrier and an orifice plate that together define the firing chamber. Each firing chamber has associated with it a respective thin-film resistor of the print head that is selectively driven by a respective transistor. The transistor includes a source, a gate, a channel, and a drain, wherein the source, channel, and drain are formed by a first polysilicon layer. The MOSTFT transistor selectively drives the resistor with sufficient current to vaporize ink in the chamber and eject ink therefrom. The MOSTFT transistor allows the print head to be manufactured on a relatively inexpensive, non-silicon substrate or a less expensive silicon substrate, due to the less restrictive criteria for the substrate material required by MOSTFT transistors. The substrate may also comprise a material that provides enhanced thermal conductivity to act as a substantial heat sink for the print head.