Planarized printheads for acoustic printing

Details Planarized printheads for acoustic printing Planarized printheads for acoustic printing

1986-12-19

1988-06-14

Hartary, Joseph W.

Recorders

Markers and/or driving means therefor

With ink supply to marker

310371, G01D 1516

Patent

active

047515341

ABSTRACT:
The output surface of an acoustic printhead having one or more concave acoustic beam forming devices for supplying focused acoustic beams to eject droplets of ink on demand from the surface of a pool of ink is planarized by filling those concave devices with a solid material having an acoustic impedance and an acoustic velocity which are intermediate the acoustic impedance and the acoustic velocity, respectively, of the ink and of the printhead. This not only facilitates the cleaning of the printhead, but also eliminates the edges upon which an optional ink transport or the like may tend to drag. The outer surface of the filler may be essentially flush with the face of the printhead, or the filler may overcoat the printhead.

REFERENCES:
patent: 4184094 (1980-01-01), Kopel
patent: 4308547 (1981-12-01), Lovelady et al.
patent: 4331964 (1982-05-01), VanLokeren
patent: 4384231 (1983-05-01), Ishikawa
patent: 4580148 (1986-04-01), Domoto et al.
Petersen, Kurt E., "Silicon as a Mechanical Material", Proceedings of the IEEE, vol. 70, No. 5, May 1982, pp. 421-457.
Krause, K. A., "Focusing Ink Jet Head", IBM Technical Disclosure Bulletin , vol. 16, No. 4, Sep. 1973.
Wise, K. D. et al., "Fabrication of Hemispherical Structures Using Semiconductor Technology for Use in Thermonuclear Fusion Research", J. Vac. Sci. Technol., vol. 16, No. 3, May/Jun. 1979, pp. 936-939.
Quate, Calvin F., "The Acoustic Microscope", Scientific American, vol. 241, No. 4, Oct. 1979, pp. 62-70.
Quate, Calvin F., "Acoustic Microscopy", American Institute of Physics, Physics Today, Aug. 1985, pp. 34-42.

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