Recorders – Performance of multiple functions of steam and gas engines – Pressure responsive element
Patent
1991-01-03
1992-06-16
Hartary, Joseph W.
Recorders
Performance of multiple functions of steam and gas engines
Pressure responsive element
346140R, 357 51, 437 51, 437 60, B41J 205
Patent
active
051228122
ABSTRACT:
An improved thermal inkjet printhead and manufacturing method in which driver circuitry (e.g. MOSFET transistors), heating resistors, and a specialized arrangement of conductive elements are used. A substrate is provided having a plurality of drive transistors thereon. A layer of resistive material (e.g. a tantalum-aluminum mixture) is deposited on the substrate and directly connected to the source, gate, and drain of at least one transistor. A layer of conductive metal (e.g. aluminum) is deposited on a portion of the resistive layer, forming both covered and uncovered regions thereof. The uncovered region functions as a heating resistor, and the covered regions function as direct electrical contacts to the transistor, thereby minimizing the number of conductive elements in the printhead. The resistor is positioned beneath an ink-retaining cavity, and is designed to heat ink therein for expulsion through an orifice plate.
REFERENCES:
patent: 3852563 (1974-12-01), Bohorquez et al.
patent: 4010355 (1991-04-01), Hawkins
patent: 4292730 (1981-10-01), Ports
patent: 4424461 (1984-01-01), Taguchi et al.
patent: 4429321 (1984-01-01), Matsumoto
patent: 4500895 (1985-02-01), Buck et al.
patent: 4510670 (1985-04-01), Schwabe et al.
patent: 4513298 (1985-04-01), Scheu
patent: 4532530 (1985-07-01), Hawkins
patent: 4596994 (1986-06-01), Matsuda
patent: 4695853 (1987-09-01), Hackleman et al.
patent: 4719477 (1988-01-01), Hess
patent: 4794409 (1988-12-01), Cowger et al.
patent: 4853718 (1989-08-01), Elhatem et al.
patent: 4875968 (1989-10-01), O'Neill et al.
patent: 4899180 (1990-02-01), Elhatem et al.
patent: 4947192 (1990-08-01), Hawkins et al.
patent: 4948747 (1990-08-01), Pfiester
patent: 4961103 (1990-10-01), Saitoh
The Hewlett-Packard Journal, vol. 39, No. 4 (Aug. 1988).
Elliot, D. J., Integrated Circuit Fabrication Technology, McGraw-Hill Book Company, New York, NY (1982), pp. 1-41.
Appels, J. A. et al., "Local Oxidation of Silicon; New Technological Aspects", Philips Research Reports, vol. 26, No. 3, pp. 157-165 (Jun. 1971).
Kooi, E. et al, "Locos Devices", Philips Research Reports, vol. 26, No. 3, pp. 166-180 (Jun. 1971).
The Hewlett-Packard Journal, vol. 36, No. 5 (May 1985).
Fasen Duane A.
Hess Ulrich E.
Hartary Joseph W.
Hewlett--Packard Company
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