Piezoelectric ink jet printer head

Abstract

Abstract PURPOSE:To reduce manufacturing cost and to obtain high resolution by a method wherein a layer-built piezoelectric ceramic element is used as a piezoelectyric transducer over a plurality of jet devides and an inner electrode layer of the layer-built piezoelectric ceramic element is composed of a positive temperature characteristic thermister material. CONSTITUTION:An array 10 composes two jet devices 34a and 34b. Since a layer-built piezoelectric ceramic element 18 functions as piezoelectric transducers of the two jet devices 34a and 34b, a structure of a printer head composed of the array 10, or further by combining many arrays 10 is simplified and manu facturing man-hours are decreased to reduce manufacturing cost. Further, since an inner electrode layer 22 of the layer-built piezoelectric ceramic element 18 is composed of a positive temperature characteristic thermistor material of which Curie temperature is lower than that of a piezoelectric ceramic layer 20 and which is quickly increased in electric resistance at said Curie temperature or higher to become an insulator, the layer-built piezoeleectric ceramic element 18 itself is easily manufactured and can be miniaturized, and resolution of printing can be improved.

Inventors

• 👤 Yoshikazu Takahashi
• 👤 義和 高橋
• 👤 Masahiko Suzuki
• 👤 雅彦 鈴木
• 👤 Makoto Takeuchi
• 👤 誠 竹内

Bibliographic Details