JP2021535699A - 超音波センサーの製造方法 - Google Patents
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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
- B06B1/06—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
- 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
- B06B1/0629—Square array
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N30/00—Piezoelectric or electrostrictive devices
- H10N30/01—Manufacture or treatment
- H10N30/09—Forming piezoelectric or electrostrictive materials
- H10N30/093—Forming inorganic materials
- H10N30/097—Forming inorganic materials by sintering
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N30/00—Piezoelectric or electrostrictive devices
- H10N30/01—Manufacture or treatment
- H10N30/08—Shaping or machining of piezoelectric or electrostrictive bodies
- H10N30/082—Shaping or machining of piezoelectric or electrostrictive bodies by etching, e.g. lithography
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N30/00—Piezoelectric or electrostrictive devices
- H10N30/01—Manufacture or treatment
- H10N30/08—Shaping or machining of piezoelectric or electrostrictive bodies
- H10N30/084—Shaping or machining of piezoelectric or electrostrictive bodies by moulding or extrusion
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N30/00—Piezoelectric or electrostrictive devices
- H10N30/20—Piezoelectric or electrostrictive devices with electrical input and mechanical output, e.g. functioning as actuators or vibrators
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N30/00—Piezoelectric or electrostrictive devices
- H10N30/80—Constructional details
- H10N30/85—Piezoelectric or electrostrictive active materials
- H10N30/853—Ceramic compositions
- H10N30/8536—Alkaline earth metal based oxides, e.g. barium titanates
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N30/00—Piezoelectric or electrostrictive devices
- H10N30/80—Constructional details
- H10N30/85—Piezoelectric or electrostrictive active materials
- H10N30/853—Ceramic compositions
- H10N30/8548—Lead based oxides
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N30/00—Piezoelectric or electrostrictive devices
- H10N30/80—Constructional details
- H10N30/87—Electrodes or interconnections, e.g. leads or terminals
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N30/00—Piezoelectric or electrostrictive devices
- H10N30/80—Constructional details
- H10N30/87—Electrodes or interconnections, e.g. leads or terminals
- H10N30/877—Conductive materials
Abstract
Description
但し、本発明で使用される技術的用語は、特定の実施態様を説明するために使用されたものに過ぎず、本発明を限定するために使用されたものではないことに留意しなければならない。
シリコンウェハーに線幅50μmの微細パターンをフォトリソグラフィ工程で成形し、PZT圧電粉末(平均粒度0.5μm〜3μm)をスプレーすることによって微細パターンの凹部に注入し、300MPaで加圧しながら1分当たり1℃ずつ昇温させた後、850℃で2時間を維持し、1分当たり1℃ずつ降温させた後、同一の条件で再焼結及び冷却を行い、フォトリソグラフィ工程で基板を除去し、エポキシ絶縁材を充填した後、ゴールドメタル堆積後にフォトリソグラフィ工程を行い、配線電極をパターニングした後にダイシングして超音波センサーを製造した。
加圧を400MPaで行ったことを除いては、実施例1と同様にして超音波センサーを製造した。
加圧を30MPaで行い、再焼結工程を省略したことを除いては、実施例1と同様にして超音波センサーを製造した。
比較例1及び実施例1−2による超音波センサーを走査電子顕微鏡(SEM、Scanning Electron Microscope)で撮影した画像を図8〜図11に示した。図9を参照すると、比較例1の場合は、粒度が小さいので、各粒子間の空隙の数が多くなる一方、実施例1及び実施例2の場合は(図10と図11を参照)、粒子の大きさが増加し、空隙の数が減少した。
比較例1及び実施例2による超音波センサーに対する超音波の送信時と受信時のインピーダンス値を測定した結果をそれぞれ図12及び図13に示した。これを参考にすると、比較例1の場合は、送受信のインピーダンスピークを区別しにくいが、実施例2の場合は、インピーダンスピークが鮮明であり、比較例1より本発明に係る超音波センサーの品質が優秀であることが分かる。
Claims (9)
- エッチング用基板に凹部と凸部を有する微細パターンを形成する段階と、
前記微細パターンの前記凹部に圧電材を充填する段階と、
前記充填された圧電材を加圧する段階と、
前記圧電材を焼結することによって仮圧電体を形成する段階と、
前記仮圧電体を再焼結することによって稠密な単位圧電体を形成する段階と、
前記単位圧電体の両端部に電極端子を形成することによって単位圧電セルを製造する段階と
を含むことを特徴とする超音波センサーの製造方法。 - 前記圧電材を充填するときは、圧電材粉末をスプレーして注入することを特徴とする、請求項1に記載の超音波センサーの製造方法。
- 前記圧電材粉末の平均粒度は0.1μm〜10μmであることを特徴とする、請求項2に記載の超音波センサーの製造方法。
- 前記加圧は200MPa〜700MPaで行うことを特徴とする、請求項1に記載の超音波センサーの製造方法。
- 前記焼結は、前記圧電材の表面が溶融される温度で行うことを特徴とする、請求項1に記載の超音波センサーの製造方法。
- 前記再焼結は、前記仮圧電体の表面が溶融される温度で行うことを特徴とする、請求項1に記載の超音波センサーの製造方法。
- 前記圧電材を充填するときは、圧電材粉末を溶媒及びバインダーに混合したペースト又は溶液状にした圧電材を充填することを特徴とする、請求項1に記載の超音波センサーの製造方法。
- 前記エッチング用基板は導電性を備えたことを特徴とする、請求項1に記載の超音波センサーの製造方法。
- 前記エッチング用基板の前記凸部の一部はリード電極であることを特徴とする、請求項8に記載の超音波センサーの製造方法。
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KR10-2018-0099287 | 2018-08-24 | ||
PCT/KR2019/000931 WO2020040376A1 (en) | 2018-08-24 | 2019-01-22 | Method of manufacturing ultrasonic sensors |
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EP (1) | EP3841622A4 (ja) |
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CN103779272B (zh) * | 2013-01-11 | 2017-06-20 | 北京纳米能源与系统研究所 | 晶体管阵列及其制备方法 |
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- 2019-01-22 JP JP2021534098A patent/JP7285590B2/ja active Active
- 2019-01-22 EP EP19853135.2A patent/EP3841622A4/en active Pending
- 2019-01-22 US US17/270,425 patent/US20210193909A1/en active Pending
- 2019-01-22 CN CN201980055688.4A patent/CN113016085A/zh active Pending
- 2019-01-22 WO PCT/KR2019/000931 patent/WO2020040376A1/en unknown
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EP3841622A4 (en) | 2022-06-08 |
KR101965171B1 (ko) | 2019-08-13 |
US20210193909A1 (en) | 2021-06-24 |
JP7285590B2 (ja) | 2023-06-02 |
EP3841622A1 (en) | 2021-06-30 |
CN113016085A (zh) | 2021-06-22 |
WO2020040376A1 (en) | 2020-02-27 |
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