WO2006092820A3 - Surface micromechanical process for manufacturing micromachined capacitive ultra- acoustic transducers - Google Patents

Surface micromechanical process for manufacturing micromachined capacitive ultra- acoustic transducers Download PDF

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Publication number
WO2006092820A3
WO2006092820A3 PCT/IT2006/000126 IT2006000126W WO2006092820A3 WO 2006092820 A3 WO2006092820 A3 WO 2006092820A3 IT 2006000126 W IT2006000126 W IT 2006000126W WO 2006092820 A3 WO2006092820 A3 WO 2006092820A3
Authority
WO
WIPO (PCT)
Prior art keywords
transducer
silicon nitride
micromachined capacitive
acoustic transducers
layers
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/IT2006/000126
Other languages
French (fr)
Other versions
WO2006092820A2 (en
Inventor
Giosue Caliano
Alessandro Caronti
Massimo Pappalardo
Elena Cianci
Vittorio Foglietti
Antonio Minotti
Alessandro Nencioni
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Consiglio Nazionale delle Richerche CNR
Universita degli Studi di Roma Tre
Esaote SpA
Original Assignee
Consiglio Nazionale delle Richerche CNR
Universita degli Studi di Roma Tre
Esaote SpA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Consiglio Nazionale delle Richerche CNR, Universita degli Studi di Roma Tre, Esaote SpA filed Critical Consiglio Nazionale delle Richerche CNR
Priority to EP06728466A priority Critical patent/EP1863597B1/en
Priority to CN200680006795.0A priority patent/CN101262958B/en
Priority to DE602006015039T priority patent/DE602006015039D1/en
Priority to AT06728466T priority patent/ATE471768T1/en
Priority to US11/817,621 priority patent/US7790490B2/en
Publication of WO2006092820A2 publication Critical patent/WO2006092820A2/en
Publication of WO2006092820A3 publication Critical patent/WO2006092820A3/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49002—Electrical device making
    • Y10T29/49005—Acoustic transducer

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Micromachines (AREA)
  • Transducers For Ultrasonic Waves (AREA)
  • Pressure Sensors (AREA)
  • Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
  • Piezo-Electric Transducers For Audible Bands (AREA)

Abstract

The invention concerns a manufacturing process, and the related micromachined capacitive ultra-acoustic transducer, that uses commercial silicon wafer 8 already covered on at least one or, more preferably, on both faces by an upper layer 9 and by a lower layer 9' of silicon nitride deposited with low pressure chemical vapour deposition technique, or deposition LPCVD deposition. One of the two layers 9 or 9' of silicon nitride, of optimal quality, covering the wafer 8 is used as emitting membrane of the transducer. As a consequence, the micro-cell array 6 forming the CMUT transducer is grown onto one of the two layers of silicon nitride, i.e. it is grown at the back of the transducer with a sequence of steps that is reversed with respect to the classical technology.
PCT/IT2006/000126 2005-03-04 2006-03-02 Surface micromechanical process for manufacturing micromachined capacitive ultra- acoustic transducers Ceased WO2006092820A2 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
EP06728466A EP1863597B1 (en) 2005-03-04 2006-03-02 Surface micromechanical process for manufacturing micromachined capacitive ultra- acoustic transducers
CN200680006795.0A CN101262958B (en) 2005-03-04 2006-03-02 Surface Micromachining Processes for Fabricating Micromachined Capacitive Ultrasonic Sensors
DE602006015039T DE602006015039D1 (en) 2005-03-04 2006-03-02 SURFACE MICROMECHANICAL METHOD FOR THE PRODUCTION OF MICROZERSPANTE CAPACITIVES ULTRA-ACOUSTIC TRANSDUCERS
AT06728466T ATE471768T1 (en) 2005-03-04 2006-03-02 SURFACE MICROMECHANICAL PROCESS FOR PRODUCING MICRO-MACHED CAPACITIVE ULTRA-ACOUSTIC TRANSDUCERS
US11/817,621 US7790490B2 (en) 2005-03-04 2006-03-02 Surface micromechanical process for manufacturing micromachined capacitive ultra-acoustic transducers and relevant micromachined capacitive ultra-acoustic transducer

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT000093A ITRM20050093A1 (en) 2005-03-04 2005-03-04 MICROMECHANICAL SURFACE PROCEDURE FOR THE MANUFACTURE OF ULTRACUSTIC TRANSDUCERS MICRO-FINISHED CAPACITORS AND THEIR ULTRACUSTIC CAPACITIVE MICROLAVORIZED TRANSDUCER.
ITRM2005A000093 2005-03-04

Publications (2)

Publication Number Publication Date
WO2006092820A2 WO2006092820A2 (en) 2006-09-08
WO2006092820A3 true WO2006092820A3 (en) 2006-11-02

Family

ID=36676422

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IT2006/000126 Ceased WO2006092820A2 (en) 2005-03-04 2006-03-02 Surface micromechanical process for manufacturing micromachined capacitive ultra- acoustic transducers

Country Status (7)

Country Link
US (1) US7790490B2 (en)
EP (1) EP1863597B1 (en)
CN (1) CN101262958B (en)
AT (1) ATE471768T1 (en)
DE (1) DE602006015039D1 (en)
IT (1) ITRM20050093A1 (en)
WO (1) WO2006092820A2 (en)

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DE602005006419T2 (en) * 2005-09-14 2008-09-25 Esaote S.P.A. Electroacoustic transducer for high frequency applications
ITRM20060238A1 (en) * 2006-05-03 2007-11-04 Esaote Spa ULTRACUSTIC MULTIPLE CAPACITOR TRANSDUCER
JP5305993B2 (en) * 2008-05-02 2013-10-02 キヤノン株式会社 Capacitive electromechanical transducer manufacturing method and capacitive electromechanical transducer
JP2010004199A (en) * 2008-06-19 2010-01-07 Hitachi Ltd Ultrasonic transducer and manufacturing method thereof
JP5409251B2 (en) * 2008-11-19 2014-02-05 キヤノン株式会社 Electromechanical transducer and method for manufacturing the same
FR2938918B1 (en) * 2008-11-21 2011-02-11 Commissariat Energie Atomique METHOD AND DEVICE FOR THE ACOUSTIC ANALYSIS OF MICROPOROSITIES IN MATERIALS SUCH AS CONCRETE USING A PLURALITY OF CMUTS TRANSDUCERS INCORPORATED IN THE MATERIAL
CN102301215B (en) * 2009-01-27 2014-03-26 国立大学法人名古屋大学 Membrane tension measuring apparatus
EP2659987A1 (en) * 2009-03-26 2013-11-06 Norwegian University of Science and Technology (NTNU) Acoustic backing layer for use in an ultrasound transducer
JP5377066B2 (en) * 2009-05-08 2013-12-25 キヤノン株式会社 Capacitive electromechanical transducer and method for producing the same
JP5317826B2 (en) * 2009-05-19 2013-10-16 キヤノン株式会社 Manufacturing method of capacitive electromechanical transducer
CN101898743A (en) * 2009-05-27 2010-12-01 漆斌 Micro-machined ultrasonic transducer
JP5550363B2 (en) 2010-01-26 2014-07-16 キヤノン株式会社 Capacitance type electromechanical transducer
DE102010027780A1 (en) 2010-04-15 2011-10-20 Robert Bosch Gmbh Method for driving an ultrasonic sensor and ultrasonic sensor
JP2011244425A (en) * 2010-04-23 2011-12-01 Canon Inc Electromechanical transducer and its manufacturing method
JP2011259371A (en) * 2010-06-11 2011-12-22 Canon Inc Manufacturing method of capacitive electromechanical transducer
US7998777B1 (en) * 2010-12-15 2011-08-16 General Electric Company Method for fabricating a sensor
EP2662024A4 (en) * 2011-01-06 2017-11-01 Hitachi, Ltd. Ultrasonic probe
JP5875243B2 (en) 2011-04-06 2016-03-02 キヤノン株式会社 Electromechanical transducer and method for manufacturing the same
EP2750806B1 (en) * 2011-12-20 2019-05-08 Koninklijke Philips N.V. Ultrasound transducer device and method of manufacturing the same
MX2014008859A (en) 2012-01-27 2014-10-06 Koninkl Philips Nv Capacitive micro-machined transducer and method of manufacturing the same.
US9002088B2 (en) * 2012-09-07 2015-04-07 The Boeing Company Method and apparatus for creating nondestructive inspection porosity standards
CN103323042A (en) * 2013-06-06 2013-09-25 中北大学 Capacitance-type ultrasonic sensor of integrated full-vibration conductive film structure and manufacturing method thereof
US9955949B2 (en) * 2013-08-23 2018-05-01 Canon Kabushiki Kaisha Method for manufacturing a capacitive transducer
CN105197876B (en) * 2014-06-20 2017-04-05 中芯国际集成电路制造(上海)有限公司 A kind of semiconductor devices and preparation method, electronic installation
CN105635926B (en) * 2014-10-29 2019-06-28 中芯国际集成电路制造(上海)有限公司 A kind of MEMS microphone and preparation method thereof, electronic device
CN105025423B (en) * 2015-06-04 2018-04-20 中国科学院半导体研究所 A kind of electret capacitor type sonac and preparation method thereof
US10722918B2 (en) * 2015-09-03 2020-07-28 Qualcomm Incorporated Release hole plus contact via for fine pitch ultrasound transducer integration
RU2628732C1 (en) * 2016-05-20 2017-08-21 Акционерное общество "Научно-исследовательский институт физических измерений" Method for forming monocrystalline element of micromechanical device
CN106449960B (en) * 2016-07-01 2018-12-25 中国计量大学 A kind of structure and production method based on static excitation/capacitance detecting micro-bridge resonator film thermoelectric converter
CN106878912A (en) * 2017-03-03 2017-06-20 瑞声科技(新加坡)有限公司 The method of the oxide layer mat surface planarization of Electret Condencer Microphone semi-finished product
DE102020211538A1 (en) * 2020-09-15 2022-03-17 Robert Bosch Gesellschaft mit beschränkter Haftung Micromechanical component, sound transducer device and method for producing a micromechanical component

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FR2721471A1 (en) * 1994-06-17 1995-12-22 Schlumberger Ind Sa Ultrasonic transducer and method of manufacturing such a transducer
US20010043029A1 (en) * 1999-05-20 2001-11-22 Sensant Corporation Acoustic transducer and method of making the same
US20030114760A1 (en) * 2001-12-19 2003-06-19 Robinson Andrew L. Micromachined ultrasound transducer and method for fabricating same
US20040085858A1 (en) * 2002-08-08 2004-05-06 Khuri-Yakub Butrus T. Micromachined ultrasonic transducers and method of fabrication

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Patent Citations (4)

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Publication number Priority date Publication date Assignee Title
FR2721471A1 (en) * 1994-06-17 1995-12-22 Schlumberger Ind Sa Ultrasonic transducer and method of manufacturing such a transducer
US20010043029A1 (en) * 1999-05-20 2001-11-22 Sensant Corporation Acoustic transducer and method of making the same
US20030114760A1 (en) * 2001-12-19 2003-06-19 Robinson Andrew L. Micromachined ultrasound transducer and method for fabricating same
US20040085858A1 (en) * 2002-08-08 2004-05-06 Khuri-Yakub Butrus T. Micromachined ultrasonic transducers and method of fabrication

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
XUECHENG JIN ET AL: "Fabrication and Characterization of Surface Micromachined Capacitive Ultrasonic Immersion Transducers", JOURNAL OF MICROELECTROMECHANICAL SYSTEMS, IEEE SERVICE CENTER, PISCATAWAY, NJ, US, vol. 8, no. 1, March 1999 (1999-03-01), XP011034832, ISSN: 1057-7157 *

Also Published As

Publication number Publication date
DE602006015039D1 (en) 2010-08-05
EP1863597A2 (en) 2007-12-12
CN101262958B (en) 2011-06-08
ATE471768T1 (en) 2010-07-15
EP1863597B1 (en) 2010-06-23
CN101262958A (en) 2008-09-10
WO2006092820A2 (en) 2006-09-08
US7790490B2 (en) 2010-09-07
US20080212407A1 (en) 2008-09-04
ITRM20050093A1 (en) 2006-09-05

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