JP2019051603A - 液体噴射ヘッド、液体噴射装置、及び、圧電デバイス - Google Patents
液体噴射ヘッド、液体噴射装置、及び、圧電デバイス Download PDFInfo
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Abstract
Description
かかる態様では、保護膜に露出孔を設けることで、充填剤から出るガスを露出孔から空間内に排出することができる。したがって、充填剤から出たガスが駆動回路の端子部や駆動回路と流路形成基板との接合界面に移動するのを抑制して、ガスによる端子部の汚染を抑制することができると共に、接合界面の密着不良によるマイグレーションを抑制することができる。
かかる態様では、充填剤から排出されたガスによる配線の短絡、絶縁破壊、マイグレーション等の不具合を抑制した液体噴射装置を実現できる。
かかる態様では、保護膜に露出孔を設けることで、充填剤から出るガスを露出孔から空間内に排出することができる。したがって、充填剤から出たガスが駆動回路の端子部や駆動回路と流路形成基板との接合界面に移動するのを抑制して、ガスによる端子部の汚染を抑制することができると共に、接合界面の密着不良によるマイグレーションを抑制することができる。
図1は、本発明の実施形態1に係る液体噴射ヘッドの一例であるインクジェット式記録ヘッドの分解斜視図であり、図2は、インクジェット式記録ヘッドの流路形成基板の平面図であり、図3は、図2のA−A′線に準じたインクジェット式記録ヘッドの断面図であり、図4は、図3の要部を拡大した図である。
図8は、本発明の実施形態2に係る液体噴射ヘッドの一例であるインクジェット式記録ヘッドの断面図である。なお、上述した実施形態と同様の部材には同一の符号を付して重複する説明は省略する。
図9は、本発明の実施形態3に係る液体噴射ヘッドの一例であるインクジェット式記録ヘッドの断面図である。なお、上述した実施形態と同様の部材には同一の符号を付して重複する説明は省略する。
図10は、本発明の実施形態4に係る液体噴射ヘッドの一例であるインクジェット式記録ヘッドの断面図である。なお、上述した実施形態と同様の部材には同一の符号を付して重複する説明は省略する。
以上、本発明の各実施形態について説明したが、本発明の基本的な構成は上述したものに限定されるものではない。
Claims (8)
- 液体を噴射する第1のノズルを含む第1のノズル列と、液体を噴射する第2のノズルを含む第2のノズル列と、が形成されたノズルプレートと、
前記第1のノズルに連通する第1の圧力発生室と、前記第2のノズルに連通する第2の圧力発生室と、が形成された流路形成基板と、
前記流路形成基板の一方面側に形成された振動板と、
前記振動板上の前記第1の圧力発生室に対応する位置に設けられた第1の圧電素子と、
前記振動板上の前記第2の圧力発生室に対応する位置に設けられた第2の圧電素子と、
前記流路形成基板の前記一方面側に接合されて流路を有する保護基板と、
前記保護基板の前記流路形成基板とは反対側に接合された流路部材と、
前記流路形成基板と前記保護基板と前記流路部材とで囲まれて形成された空間内であって、前記流路形成基板の前記第1の圧電素子と前記第2の圧電素子との間に実装されて、前記第1の圧電素子と前記第2の圧電素子とを駆動する駆動回路と、
前記駆動回路と前記流路形成基板及び前記保護基板との間に充填された充填剤と、
前記保護基板の前記流路の内壁から前記保護基板の前記流路部材との接合面の少なくとも前記内壁との境界側まで形成された保護膜と、
を具備し、
前記保護膜は、前記充填剤の表面の少なくとも一部を露出する露出孔を有することを特徴とする液体噴射ヘッド。 - 前記保護膜は、前記充填剤の前記表面の一部に延設されており、前記露出孔は、前記充填剤の前記表面の一部を露出することを特徴とする請求項1記載の液体噴射ヘッド。
- 前記露出孔は、前記充填剤の表面の全面を露出する大きさで形成されていることを特徴とする請求項1記載の液体噴射ヘッド。
- 前記保護基板の前記流路部材との接合面に形成された前記保護膜は、複数の凹部を有することを特徴とする請求項1〜3の何れか一項に記載の液体噴射ヘッド。
- 前記駆動回路が配置された前記空間は、大気開放されていることを特徴とする請求項1〜4の何れか一項に記載の液体噴射ヘッド。
- 前記駆動回路が配置された前記空間内には、前記充填剤から発生するガスを吸収する吸着剤が設けられていることを特徴とする請求項1〜5の何れか一項に記載の液体噴射ヘッド。
- 請求項1〜6の何れか一項に記載の液体噴射ヘッドを具備することを特徴とする液体噴射装置。
- 液体噴射ヘッドに用いられる圧電デバイスであって、
第1の凹部と第2の凹部とが形成された流路形成基板と、
前記流路形成基板の一方面側に形成された振動板と、
前記振動板上の前記第1の凹部に対応する位置に設けられた第1の圧電素子と、
前記振動板上の前記第2の凹部に対応する位置に設けられた第2の圧電素子と、
前記流路形成基板の前記一方面側に接合されて流路を有する保護基板と、
前記保護基板の前記流路形成基板とは反対側に接合された流路部材と、
前記流路形成基板と前記保護基板と前記流路部材とで囲まれて形成された空間内であって、前記流路形成基板の前記第1の圧電素子と前記第2の圧電素子との間に実装されて、前記第1の圧電素子と前記第2の圧電素子とを駆動する駆動回路と、
前記駆動回路と前記流路形成基板及び前記保護基板との間に充填された充填剤と、
前記保護基板の前記流路の内壁から前記保護基板の前記流路部材との接合面の少なくとも前記内壁との境界側まで形成された保護膜と、
を具備し、
前記保護膜は、前記充填剤の表面の少なくとも一部を露出する露出孔を有することを特徴とする圧電デバイス。
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