Patent ID: 6682178
Filing Date: 2004-01-27
Classification: B41J

Abstract:
An ink-jet recording head comprising:a passage-forming substrate having a plurality of pressure generating chambers communicating with corresponding nozzle orifices and separated from one another by means of a plurality of compartment walls; and a plurality of piezoelectric elements provided on one side of said passage-forming substrate via an vibration plate and each comprising a lower electrode, a piezoelectric layer, and an upper electrode, wherein said vibration plate undergoes tensile stress; the number n of said pressure generating chambers arranged per inch is more than 200 and is related to width w of said pressure generating chamber and thickness d of said compartment wall as represented by (w+d)=1 inch/n; and the thickness d of said compartment wall is more than 10 &mgr;m and is related to thickness h of said passage-forming substrate as represented by (dÃ—3)&lE;h&lE;(dÃ—6).