LIQUID INJECTION HEAD, LIQUID INJECTION DEVICE, AND PIEZOELECTRIC DEVICE

• Main Authors: HIRAI EIKI, TAKABE HONKI
• Format: Patent
• Language: English; Japanese
• Published: 21.02.2019
• Subjects: CORRECTION OF TYPOGRAPHICAL ERRORS; i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; LINING MACHINES; PERFORMING OPERATIONS; PRINTING; SELECTIVE PRINTING MECHANISMS; STAMPS; TRANSPORTING; TYPEWRITERS

To suppress occurrence of cracks in a piezoelectric layer.SOLUTION: A liquid injection head comprises: a pressure chamber storing liquid; and a piezoelectric device injecting the liquid from the pressure chamber. The piezoelectric device comprises: a first electrode; a piezoelectric layer; a second electrode; an insulation layer; first wiring electrically connected to the second electrode; and second wiring electrically connected to the second electrode. The liquid injection head includes: a first region where the first electrode, the piezoelectric layer and the second electrode are laminated in this order; a second region positioned at a first end side of the piezoelectric layer, where the first electrode, the piezoelectric layer, the insulation layer and the first wiring are laminated in this order; and a third region positioned at a second end side opposite to the first end in the piezoelectric layer, where the first electrode, the piezoelectric layer, the insulation layer and the second wiring are laminated in this order.SELECTED DRAWING: Figure 5 【課題】圧電体層におけるクラックの発生を抑制する。【解決手段】液体を収容する圧力室と、前記圧力室から液体を噴射させる圧電デバイスとを具備する液体噴射ヘッドであって、前記圧電デバイスは、第１電極と、圧電体層と、第２電極と、絶縁層と、前記第２電極に電気的に接続される第１配線と、前記第２電極に電気的に接続される第２配線とを具備し、前記第１電極と前記圧電体層と前記第２電極とがこの順番で積層された第１領域と、前記圧電体層の第１端側に位置し、前記第１電極と前記圧電体層と前記絶縁層と前記第１配線とがこの順番で積層された第２領域と、前記圧電体層における前記第１端とは反対の第２端側に位置し、前記第１電極と前記圧電体層と前記絶縁層と前記第２配線とがこの順番で積層された第３領域とを含む液体噴射ヘッド。【選択図】図５