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Piezoelectric Driver for Drop-On-Demand Ink Jet

IP.com Disclosure Number: IPCOM000039618D
Original Publication Date: 1987-Jul-01
Included in the Prior Art Database: 2005-Feb-01
Document File: 2 page(s) / 70K

Publishing Venue

IBM

Related People

Lee, FC: AUTHOR [+4]

Abstract

An array of piezoelectric transducers is described which is suitable for drop-on-demand ink jet printing. The array of transducers comprise a corrugated part formed of piezoelectric materials and a flat cover plate made of materials with reasonable mechanical and acoustic properties. The array shown in Fig. 1 comprises a corrugated part 1 formed of piezoelectric materials and a flat cover plate 2. These two parts are bonded together, and electrodes 3, 4 are formed on the appropriate surfaces of the piezoelectric material, either before or after the bonding process to produce drive and ground electrodes for each transducer in the array. The last step is to remove, by etching or machining, the piezoelectric material 5 between active channels to reduce the tethering effect between active and inactive piezoelectric materials.

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Piezoelectric Driver for Drop-On-Demand Ink Jet

An array of piezoelectric transducers is described which is suitable for drop-on- demand ink jet printing. The array of transducers comprise a corrugated part formed of piezoelectric materials and a flat cover plate made of materials with reasonable mechanical and acoustic properties. The array shown in Fig. 1 comprises a corrugated part 1 formed of piezoelectric materials and a flat cover plate 2. These two parts are bonded together, and electrodes 3, 4 are formed on the appropriate surfaces of the piezoelectric material, either before or after the bonding process to produce drive and ground electrodes for each transducer in the array. The last step is to remove, by etching or machining, the piezoelectric material 5 between active channels to reduce the tethering effect between active and inactive piezoelectric materials. Different cross-sectional geometries can also be made from the same concept, as shown in Figs. 2 and 3. In addition, a square squeeze

(Image Omitted)

tube transducer 6 is shown in Fig. 4 which comprises two symmetrical halves of piezoelectric material bonded together. The above embodiments demonstrate a new way of making piezoelectric arrays in which reduced manufacturing cost is attained by taking advantage of low cost planar fabrication techniques while maintaining the inherent acoustic efficiency of the cylindrical and/or spherical geometry. A further embodiment is shown in Figs. 5 and 6 in whi...