JP7145892B2 - 複数の離間されたセグメントに分離された基板を有する腔内超音波撮像装置、溝を有する腔内超音波撮像装置、及び製造する方法 - Google Patents
複数の離間されたセグメントに分離された基板を有する腔内超音波撮像装置、溝を有する腔内超音波撮像装置、及び製造する方法 Download PDFInfo
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- B06B1/02—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy
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- B06B1/0607—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with piezoelectric effect or with electrostriction using multiple elements
- B06B1/0622—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with piezoelectric effect or with electrostriction using multiple elements on one surface
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- A61B8/4483—Constructional features of the ultrasonic, sonic or infrasonic diagnostic device characterised by features of the ultrasound transducer
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- G01S15/88—Sonar systems specially adapted for specific applications
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- B06B1/02—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy
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Description
Claims (15)
- 患者の身体内腔内に配置されるように構成され、近位部分及び遠位部分を有する可撓性細長部材と、
前記可撓性細長部材の前記遠位部分に配置され、前記身体内腔の撮像データを取得するように構成される超音波撮像アセンブリであって、前記超音波撮像アセンブリが、
マイクロマシン超音波トランスデューサ素子に対する領域を含む複数の離間されたセグメントに分離された基板であって、前記領域が、前記セグメント上に配置され、前記セグメントが、各々、複数の側壁を持ち、分離領域により囲まれる、当該基板、
前記基板の上に配置されたハードマスク層、及び
前記領域において前記ハードマスク層の上に配置された複数の行のトランスデューサ素子、
を有し、
前記ハードマスク層が、前記マイクロマシン超音波トランスデューサ素子に対する前記領域の周りで前記分離領域上にスクリーンを形成するようにパターニングされ、前記分離領域上の前記スクリーンが、前記ハードマスク層に形成された孔のアレイを含み、
前記基板の前記複数の離間されたセグメントの各々の少なくとも1つの側壁が、互いに垂直な2つの方向に沿って伝搬するスカラップエッチングフィーチャを有する、当該超音波撮像アセンブリと、
を有する腔内超音波撮像装置。 - 前記基板が、シリコンを有し、
前記ハードマスク層が、酸化ケイ素を有する、
請求項1に記載の腔内超音波撮像装置。 - 前記複数の行のトランスデューサ素子の各々が、容量性マイクロマシン超音波トランスデューサ(CMUT)素子又は圧電マイクロマシン超音波トランスデューサ(PMUT)素子を有する、請求項1に記載の腔内超音波撮像装置。
- 前記超音波撮像アセンブリが、可撓性相互接続を更に有し、
前記複数の行のトランスデューサ素子の2つが、溝により互いから離間され、
前記可撓性相互接続が、前記溝の上に広がり、
前記可撓性相互接続が、凹部のアレイを含む表面を有する、
請求項1に記載の腔内超音波撮像装置。 - 腔内超音波撮像装置を製造する方法において、
第1の側においてハードマスクを有する基板を提供するステップであって、前記基板が、マイクロマシン超音波トランスデューサ素子に対する領域を含み、前記領域が、セグメント内に配置され、前記セグメントは、分離フィーチャが形成されるべき分離領域により囲まれる、ステップと、
第1の領域において前記ハードマスクに第1の複数の孔を形成するステップであって、前記第1の領域は、前記マイクロマシン超音波トランスデューサ素子が製造されるべき領域の周りの前記分離領域上にある、ステップと、
前記第1の複数の孔を通して前記基板をエッチングするステップであって、これにより前記分離フィーチャを提供するように前記基板における前記セグメント間に溝を形成するステップと、
前記第1の複数の孔の上に材料層を堆積するステップと、
前記マイクロマシン超音波トランスデューサ素子に対する前記領域において前記第1の領域に隣接して複数の超音波トランスデューサ素子を形成するステップと、
前記第1の領域及び前記マイクロマシン超音波トランスデューサ素子に対する前記領域において前記基板の上に可撓性層を形成するステップと、
を有する方法。 - 前記基板が、シリコンオンインシュレータ(SOI)基板である、請求項5に記載の方法。
- 前記基板を提供するステップが、前記基板の前記第1の側において前記ハードマスクを形成することを有する、請求項5に記載の方法。
- 前記第1の領域において前記ハードマスクに前記第1の複数の孔を形成するステップが、エッチングマスクとして金属層を使用して前記ハードマスクをエッチングすることを有する、請求項5に記載の方法。
- 前記第1の複数の孔を通して前記基板をエッチングするステップが、ディープリアクティブイオンエッチング(DRIE)を使用して前記第1の複数の孔を通して前記基板をエッチングすることを有する、請求項5に記載の方法。
- 前記第1の複数の孔の上に前記材料層を堆積するステップが、プラズマ化学気相堆積法(PECVD)を使用して前記材料層を堆積することを有する、請求項5に記載の方法。
- 前記マイクロマシン超音波トランスデューサ素子に対する前記領域において前記複数の超音波トランスデューサ素子を形成するステップが、容量性マイクロマシン超音波トランスデューサ(CMUT)素子又は圧電マイクロマシン超音波トランスデューサ(PMUT)素子を形成することを有する、請求項5に記載の方法。
- 前記溝を露出するように前記基板の第2の側において開口を形成するステップ、
を更に有する、請求項5に記載の方法。 - 前記開口を通して前記第2の側から、前記溝において露出された前記材料層及び前記ハードマスクを取り除くステップ、
を更に有する、請求項12に記載の方法。 - 前記第1の複数の孔の上に配置された前記材料層を平坦化するステップを更に有する、請求項5に記載の方法。
- 患者の身体内腔内に配置されるように構成され、近位部分及び遠位部分を有する可撓性細長部材と、
前記可撓性細長部材の前記遠位部分に配置され、前記身体内腔の撮像データを取得するように構成される超音波撮像アセンブリであって、前記超音波撮像アセンブリが、
基板、
前記基板の上に配置された酸化ケイ素層、及び
前記酸化ケイ素層の上に配置された複数の行のマイクロマシン超音波トランスデューサ素子、
を有し、前記複数の行のマイクロマシン超音波トランスデューサ素子の2つが、前記酸化ケイ素層に形成されたスクリーンを通してエッチングすることにより形成された溝により離間される、当該超音波撮像アセンブリと、
を有し、
前記腔内超音波撮像装置が、請求項6に記載の方法によって形成される、
腔内超音波撮像装置。
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