LIQUID EJECTION HEAD AND ITS MANUFACTURING METHOD

• Main Authors: YOSHIKAWA SHINPEI, ISHIWATA TOMOKI, IWANAGA SHUZO, OIKAWA MAKI, TOMIZAWA KEIJI, SATO TOMOATSU, HAMMURA AKIKO, MURAOKA CHIAKI
• Format: Patent
• Language: English; Japanese
• Published: 12.03.2020
• 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 improve electrical reliability.SOLUTION: A liquid ejection head comprises: a substrate 2 including energy generation elements 19 that apply ejecting energy to a liquid, and a substrate upper surface 18 provided with a terminal 11 to which an electric wire 12 is connected to transmit a signal for driving the energy generation elements 19; an ejection port formation member 3 including an ejection ports 10 for ejecting the liquid, and an ejection port formation surface 17 in which the ejection ports 10 are formed, and provided with a rear surface of the ejection port formation surface 17 on a side of the substrate upper surface 18; and a sealing agent 13 covering a connection portion between the electric wire 12 and the terminal 11. The ejection port area 40 of the ejection port formation surface 17, in which at least the ejection ports 10 are formed, is a high water-repellent area 14. An end area 41 of the ejection port formation surface 17 located between the ejection port area 40 and the terminal 11 in a plan view of the substrate upper surface 18 is a low water-repellent area 23, and at least part of the end area 41 is covered with the sealing agent 13.SELECTED DRAWING: Figure 2 【課題】電気的信頼性を向上させる。【解決手段】液体に吐出のためのエネルギーを与えるエネルギー発生素子１９と、エネルギー発生素子１９を駆動するための信号を伝搬する電気配線１２が接続された端子１１が設けられた基板上面１８と、を具備する基板２と、液体を吐出する吐出口１０と、吐出口１０が形成された吐出口形成面１７と、を具備し、吐出口形成面１７の裏面が基板上面１８の側に設けられた吐出口形成部材３と、電気配線１２と端子１１との接続部分を覆う封止剤１３と、を有し、吐出口形成面１７の少なくとも吐出口１０が形成された吐出口領域４０は高撥水性領域１４であり、基板上面１８を平面視した際の吐出口領域４０と端子１１との間に位置する吐出口形成面１７の端部領域４１は低撥水性領域２３であり、端部領域４１の少なくとも一部が封止剤１３で覆われている。【選択図】図２