JP5260650B2 - 高k誘電体を有するcmut - Google Patents
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- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 229910010413 TiO 2 Inorganic materials 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
- B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
- B06B1/00—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency
- B06B1/02—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy
- B06B1/0292—Electrostatic transducers, e.g. electret-type
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Transducers For Ultrasonic Waves (AREA)
- Micromachines (AREA)
Description
Claims (21)
- 容量性超音波トランスデューサであって、
第1の電極と、
第2の電極と、
間隙によって前記第1の電極及び前記第2の電極から隔てられ、中央領域及び周辺領域を有する第3の電極と、
前記第3の電極と前記第1の電極との間及び前記第3の電極と前記第2の電極との間に配置される高誘電率材料の層と、
を有し、前記容量性超音波トランスデューサが崩壊モードで動作する際、前記第3の電極の前記中央領域は、前記第1の電極の方へ間隙なく崩壊して、前記高誘電率材料の層が前記中央領域と前記第1の電極との間にサンドイッチされ、前記第3の電極の前記周辺領域は、前記第2の電極の方へ間隙を有して崩壊可能であり、前記第2の電極に対して振動する、容量性超音波トランスデューサ。 - 前記高誘電率材料の層は、前記容量性超音波トランスデューサの非動作時、前記第1及び前記第2の電極の各々と離間された位置に配置される、請求項1に記載の容量性超音波トランスデューサ。
- 前記高誘電率材料の層及び前記第3の電極が互いに固着される、請求項2に記載の容量性超音波トランスデューサ。
- 前記高誘電率材料の層は、前記第1及び前記第2の電極に固着され、前記第3の電極の前記中央領域及び前記周辺領域が更に、前記容量性超音波トランスデューサの非動作時、前記高誘電率材料の層と離間された位置にある、請求項1に記載の容量性超音波トランスデューサ。
- 前記容量性超音波トランスデューサが第4の電極を更に有し、前記高誘電率材料の層の少なくとも一部が、前記第3及び前記第4の電極の間にサンドイッチされた圧電層を形成し、前記第3及び前記第4の電極が、前記圧電層に電界を印加するように協働する、請求項1に記載の容量性超音波トランスデューサ。
- 前記第3及び前記第4の電極の各々は、前記高誘電率材料の層に固着される、請求項5に記載の容量性超音波トランスデューサ。
- 前記高誘電率材料の層は、前記圧電層の少なくとも一部を形成する、請求項6に記載の容量性超音波トランスデューサ。
- 前記第3の電極及び前記第4の電極は、前記圧電層に対してd31モード圧電結合を生成するように協働する、請求項7に記載の容量性超音波トランスデューサ。
- 前記第3及び第4の電極は、前記高誘電率材料の層の共通の側面に沿って配置される、請求項6に記載の容量性超音波トランスデューサ。
- 前記第3及び前記第4の電極は互いにかみ合う、請求項9に記載の容量性超音波トランスデューサ。
- 前記第3及び前記第4の電極は、前記圧電層に対してd33モード圧電結合を生成するように協働する、請求項9に記載の容量性超音波トランスデューサ。
- 前記高誘電率材料の層の誘電率は、少なくとも100の値を有する、請求項1に記載の容量性超音波トランスデューサ。
- 前記容量性超音波トランスデューサが第4の電極を更に有し、前記第1の電極は、前記第2の電極と前記第4の電極との間に配置され、前記第3の電極は、前記中央領域の外側に、間隙によって前記第4の電極から隔てられる別の周辺領域を更に有し、前記高誘電率材料の層は更に、前記第3の電極と前記第4の電極との間に配置され、前記第3の電極の前記別の周辺領域は、前記容量性超音波トランスデューサが崩壊モードで動作する際、前記第4の電極の方へ間隙を有して崩壊可能であり、前記第4の電極に対して振動する、請求項1に記載の容量性超音波トランスデューサ。
- 請求項1に記載の容量性超音波トランスデューサを有する医用撮像システム。
- 共通基板に配置された請求項1に記載の容量性超音波トランスデューサのアレイを有する医用撮像システム。
- 容量性超音波トランスデューサを動作させる方法であって、
第1の電極と、第2の電極と、間隙によって前記第1の電極及び前記第2の電極から隔てられ、中央領域及び周辺領域を有する第3の電極と、前記第3の電極と前記第1の電極との間及び前記第3の電極と前記第2の電極との間に配置される高誘電率材料の層と、を有する前記容量性超音波トランスデューサを準備するステップと、
前記第1の電極の方へ前記3の電極の前記中央領域を間隙なく崩壊させて、前記高誘電率材料の層が、前記第3の電極の前記中央領域と前記第1の電極との間にサンドイッチされるようにするステップと、
前記第2の電極に対して、前記中央領域の外側に配置される前記第3の電極の周辺領域を振動させるステップと、
を含む方法。 - 前記容量性超音波トランスデューサが第4の電極を更に有し、前記高誘電率材料の層の少なくとも一部が、前記第3及び前記第4の電極の間にサンドイッチされた圧電層を形成し、前記方法が、前記圧電層に対して圧電結合を生成するように前記第3及び前記第4の電極を協働的に用いるステップを更に含む、請求項16に記載の方法。
- 前記容量性超音波トランスデューサの間隙及びスチフネスのうち少なくとも1つを較正するために前記圧電結合が生成される、請求項17に記載の方法。
- 前記容量性超音波トランスデューサが容量性駆動と前記圧電結合の組み合わせにおいて動作される、請求項17に記載の方法。
- 前記圧電結合は、d33モード圧電結合を含む、請求項17に記載の方法。
- 前記圧電結合は、d31モード圧電結合を含む、請求項17に記載の方法。
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
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US95291807P | 2007-07-31 | 2007-07-31 | |
US60/952,918 | 2007-07-31 | ||
PCT/IB2008/053082 WO2009016606A2 (en) | 2007-07-31 | 2008-07-31 | Cmuts with a high-k dielectric |
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JP2010535445A JP2010535445A (ja) | 2010-11-18 |
JP5260650B2 true JP5260650B2 (ja) | 2013-08-14 |
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US (1) | US8203912B2 (ja) |
EP (1) | EP2170531A2 (ja) |
JP (1) | JP5260650B2 (ja) |
CN (1) | CN101772383B (ja) |
WO (1) | WO2009016606A2 (ja) |
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JP2010535445A (ja) | 2010-11-18 |
EP2170531A2 (en) | 2010-04-07 |
CN101772383A (zh) | 2010-07-07 |
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WO2009016606A3 (en) | 2009-08-06 |
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