WO2006038525A1 - 超音波探触子 - Google Patents
超音波探触子 Download PDFInfo
- Publication number
- WO2006038525A1 WO2006038525A1 PCT/JP2005/017998 JP2005017998W WO2006038525A1 WO 2006038525 A1 WO2006038525 A1 WO 2006038525A1 JP 2005017998 W JP2005017998 W JP 2005017998W WO 2006038525 A1 WO2006038525 A1 WO 2006038525A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- piezoelectric vibrator
- ultrasonic probe
- conductor
- acoustic matching
- adhesive
- Prior art date
Links
- 239000000523 sample Substances 0.000 title claims abstract description 38
- 238000002604 ultrasonography Methods 0.000 title abstract 3
- 239000004020 conductor Substances 0.000 claims abstract description 18
- 239000000853 adhesive Substances 0.000 claims description 63
- 230000001070 adhesive effect Effects 0.000 claims description 63
- 239000000758 substrate Substances 0.000 claims description 22
- 238000004519 manufacturing process Methods 0.000 claims description 17
- 230000000873 masking effect Effects 0.000 claims description 8
- 230000013011 mating Effects 0.000 claims description 2
- 230000015572 biosynthetic process Effects 0.000 claims 1
- 238000006073 displacement reaction Methods 0.000 claims 1
- 230000005684 electric field Effects 0.000 description 6
- 238000005452 bending Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000005520 cutting process Methods 0.000 description 3
- 238000005286 illumination Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000003287 optical effect Effects 0.000 description 3
- 230000001154 acute effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 229910000679 solder Inorganic materials 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001902 propagating effect Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000007650 screen-printing Methods 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B8/00—Diagnosis using ultrasonic, sonic or infrasonic waves
- A61B8/44—Constructional features of the ultrasonic, sonic or infrasonic diagnostic device
- A61B8/4483—Constructional features of the ultrasonic, sonic or infrasonic diagnostic device characterised by features of the ultrasound transducer
-
- 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
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B8/00—Diagnosis using ultrasonic, sonic or infrasonic waves
- A61B8/12—Diagnosis using ultrasonic, sonic or infrasonic waves in body cavities or body tracts, e.g. by using catheters
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B8/00—Diagnosis using ultrasonic, sonic or infrasonic waves
- A61B8/44—Constructional features of the ultrasonic, sonic or infrasonic diagnostic device
- A61B8/4444—Constructional features of the ultrasonic, sonic or infrasonic diagnostic device related to the probe
- A61B8/445—Details of catheter construction
-
- 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
- Y10T29/42—Piezoelectric device making
-
- 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
Definitions
- the present invention relates to an ultrasonic probe that obtains an ultrasonic tomographic image by transmitting and receiving ultrasonic waves in a body cavity of a living body.
- Patent Document 1 An ultrasonic probe used in an ultrasonic diagnostic apparatus requires fine processing in its manufacture, and various manufacturing methods have been proposed (for example, Patent Document 1, Patent document 2.).
- Patent Document 1 describes that an FPC and a piezoelectric vibrator are bonded.
- solder when solder is used, the load mass to vibration of each piezoelectric vibrator after cutting, which makes it difficult to control the amount of solder, varies.
- Patent Document 2 there is an example in which a conductive adhesive is used as a method other than soldering.
- a wiring board is provided on the side surface of the back load material, and this board and the piezoelectric vibrator are wired with a conductive adhesive.
- Patent Document 1 Japanese Patent Laid-Open No. 5-3598
- Patent Document 2 Japanese Patent Publication No.59-20240
- the present invention provides an ultrasonic probe that is small in size, improved in reliability, does not hinder vibration of a piezoelectric vibrator, and suppresses characteristic variations.
- a plurality of piezoelectric vibrators each having an electrode on each of two opposed surfaces, an acoustic matching layer laminated on a first surface side of the two surfaces, and the piezoelectric A wiring board that is in contact with a vibrator and stacked on the acoustic matching layer; and a conductor that electrically connects the wiring board and the electrode on the second surface side of the two surfaces.
- the method of manufacturing an ultrasonic probe includes: a piezoelectric vibrator forming step of forming the piezoelectric vibrator in the acoustic matching layer; and the piezoelectric vibration on a surface of the acoustic matching layer and a side surface of the piezoelectric vibrator.
- FIG. 1 is a diagram showing an external configuration of an ultrasonic endoscope.
- FIG. 2 is an enlarged view of the distal end portion 3 of the ultrasonic endoscope 1 of FIG.
- FIG. 3 is a perspective view of the structure constituting the ultrasonic transducer in the manufacturing process of the ultrasonic transducer. It is.
- FIG. 4 is a diagram showing a manufacturing process of an ultrasonic transducer constituting the inside of the ultrasonic probe 10 in the first embodiment.
- FIG. 5 is a diagram showing a manufacturing process of an ultrasonic transducer constituting the inside of the ultrasonic probe 10 in the second embodiment.
- FIG. 6 is a diagram showing a manufacturing process of an ultrasonic transducer constituting the inside of the ultrasonic probe 10 in the third embodiment.
- FIG. 7 is a view showing a state in which an adhesive according to a fourth embodiment is applied to the side surface of a piezoelectric vibrator 23.
- FIG. 1 shows an external configuration of an ultrasonic endoscope according to an embodiment of the present invention.
- the ultrasonic endoscope 1 includes an operation unit 6 at the base end of the elongated insertion unit 2 and a scope connector 8 at one end.
- a universal code 7 connected to a light source device (not shown) extends from the side of the operation unit 6.
- the scope connector 8 is connected to an ultrasonic observation apparatus (not shown).
- the insertion portion 2 is configured by connecting a distal end portion 3, a bendable bending portion 4, and a flexible flexible tube portion 5 in order from the distal end side.
- the operation section 6 is provided with a bending operation knob 6a, and the bending section 4 can be bent by operating the bending operation knob 6a.
- FIG. 2 is an enlarged view of the distal end portion 3 of the ultrasonic endoscope 1 of FIG.
- An ultrasonic probe 10 is provided at the distal end portion 3, and an inclined surface portion 12 is provided between the bending portion 4 and the ultrasonic probe 10.
- the ultrasonic probe 10 is covered with a material on which the acoustic lens 11 is formed.
- the slope 12 includes an illumination lens cover 14 that constitutes an illumination optical unit that irradiates the observation site with illumination light, an observation lens cover 13 that constitutes an observation optical unit that captures an optical image of the observation site, and an opening through which the treatment tool projects.
- a forceps outlet 15 is provided.
- FIG. 3 is a perspective view of the structure constituting the ultrasonic transducer in the manufacturing process of the ultrasonic transducer.
- the wiring substrate 20, the conductor 21, the electrodes 22 (22a, 22b), the piezoelectric transducer 23, the acoustic matching layer 24 (first acoustic matching layer 2 4a, the second acoustic matching layer 24b), the GND (ground) conductive portion 25, and the structure A composed of the groove 26 are produced. Now, the production of the structure A will be described.
- the first acoustic matching layer 24a is formed.
- a dicing saw precision cutting machine
- a groove is formed in the first acoustic matching layer 24a, and conductive grease is cast in the groove to form the GND conductive portion 25.
- the piezoelectric vibrator 23 in which the electrode layers 22a and 22b are formed on both opposing surfaces is joined.
- the wiring board 20 is attached adjacent to the piezoelectric vibrator 23.
- An electrode layer 20 a is formed on the surface of the wiring board 20.
- a conductor 21 for electrically connecting the electrode 20a and the electrode 22a is attached.
- the structure A formed as described above is cut to form a plurality of grooves (dicing grooves) 26 having a width of several tens of ⁇ m.
- the groove width is preferably 20-50 / ⁇ ⁇ .
- the structure A is cut so that only the second acoustic matching layer 24b is not completely cut but remains several tens / z m.
- an ultrasonic probe in which the amount of conductive adhesive on each piezoelectric vibrator is made uniform and the upper surface of the wiring board adjacent to the piezoelectric vibrator is lower than the upper surface of the piezoelectric vibrator. Will be described.
- FIG. 4 shows a manufacturing process of the ultrasonic transducer constituting the inside of the ultrasonic probe 10 in the present embodiment.
- the acoustic matching layer 24 is formed, and the piezoelectric vibrator 23 is adhered thereon.
- the wiring substrate 20 is bonded to both the upper surface of the acoustic matching layer 24 and the side surface of the piezoelectric vibrator 23 (FIG. 4 (a)).
- the thickness of the wiring board 20 is made thinner than the thickness of the piezoelectric vibrator 23 so that the upper face of the wiring board 20 does not become higher than the upper face of the piezoelectric vibrator 23.
- the electrode layers 22a and 22b are omitted. Explained below The same applies to Figures 5 to 7.
- a conductive adhesive 33 is applied by screen printing. That is, first, as shown in FIG. 4B, the mask member 30 is brought into contact with the upper surface of the piezoelectric vibrator 23.
- the mask member 30 used in the present embodiment is a flat plate, and an elongated hole 31 is provided on the flat plate in the plane direction. As described above, since the upper surface of the wiring substrate 20 is lower than the upper surface of the piezoelectric vibrator 23, a gap is generated between the lower surface of the mask 30 and the upper surface of the wiring substrate 20.
- a pile of conductive adhesive 33 is applied in the vicinity of the hole 31 on the upper surface of the mask 30, and the tip of the squeegee 32 is in contact with the upper surface of the mask 30. Move toward hole 31. Then, as shown in FIG. 4 (d), the conductive adhesive 33 is pushed out into the hole 31, and the conductive adhesive 33 is formed along the shape of the hole 31 with the piezoelectric vibrator 23 and the wiring board 20 Adhere (ie, become conductor 21).
- the conductive adhesive 33 is cured by removing the mask 30 and heating.
- the conductive adhesive 33 is gel-like and has a high viscosity, so the liquid will not drip after removing the mask 30! /.
- the thickness of the wiring board 20 is the same as the thickness of the piezoelectric vibrator 23, even if the design dimensions are difficult to match in terms of machining accuracy, a difference always occurs at the intersection level. If the wiring substrate 20 is thicker than the piezoelectric vibrator 23, a gap is formed between the piezoelectric vibrator 23 and the mask 30, so that the mask is unintentionally deformed by the squeegee 32 and the conductivity on the piezoelectric vibrator 23 is increased. The amount of the adhesive becomes indefinite, and the mass load becomes nonuniform in each vibrator. In the present embodiment, the thickness of the wiring board 20 is made thinner than the thickness of the piezoelectric vibrator 23. However, the position of the upper surface of the wiring board 20 is actually lower than the upper face of the piezoelectric vibrator 23. That's fine.
- FIG. 5 shows a manufacturing process of the ultrasonic transducer constituting the inside of the ultrasonic probe 10 in the present embodiment.
- the wiring substrate 20 is bonded to the upper surface of the acoustic matching layer 24 and the side surface of the piezoelectric vibrator 23. This bonding is performed using the adhesive 40 (FIG. 5 (a)).
- the structure A forms a dicing groove 26 by making a plurality of cuts with a dicing saw. However, if the structure A is not sufficiently bonded using the adhesive 40, the dicing groove 26 is formed. Otherwise, the wiring substrate 20, the acoustic matching layer 24, or the piezoelectric vibrator 23 may peel off, resulting in disconnection or poor connection.
- the corners of the wiring board 20 are chamfered (41) to increase the surface area to be bonded.
- the concave portion 42 may be provided in the acoustic matching layer 24, and the adhesive may be filled therewith to increase the surface area to be bonded and to expect an anchor effect.
- Fig. 5 (b) and Fig. 5 (c) may be combined.
- an elastic adhesive may be used. This is because, when an elastic adhesive is used, it is possible to suppress the bonded member from being peeled off by vibration. Also
- the anchor effect of the adhesive is enhanced, and it is possible to withstand the load when dicing the wiring board with a margin. Thereby, a yield can be improved.
- the wiring board is made of the same ceramic as the piezoelectric vibrator and the load on the dicing blade is the same,.
- FIG. 6 shows a manufacturing process of an ultrasonic transducer constituting the inside of the ultrasonic probe 10 in the present embodiment.
- the corners of the piezoelectric vibrator 23 are chamfered (50).
- the increase in the area of the conductive adhesive and the piezoelectric vibrator can enhance the bonding between the conductive adhesive and the piezoelectric vibrator.
- the conductive adhesive may be peeled off from the piezoelectric vibrator 23 and may be disconnected.
- the acute angle is chamfered to distribute the stress.
- the contact area between the conductive adhesive and the piezoelectric vibrator is increased, and further, by dispersing the stress, the rate of disconnection and the like can be reduced, so that the yield is improved.
- FIG. 7 shows a state in which an adhesive is applied to the side surface of the piezoelectric vibrator 23.
- FIG. 7A shows the case where the adhesive 60 is applied only to the side surface portion of the piezoelectric vibrator 23 corresponding to the portion to be bonded to the side surface of the wiring board 20.
- FIG. 7B shows the case where the adhesive 62 is applied to the entire side surface of the piezoelectric vibrator 23.
- FIG. 7A a part 61 of the side surface of the piezoelectric vibrator 23 is in direct contact with the conductive adhesive 33 in FIG. 7A. Since an electric field is also generated in an oblique direction between the bottom surface of the vibrator 23, vibration is generated in the same direction as this direction. Since the vibration in the oblique direction becomes unnecessary vibration, it is a loss with respect to the originally required vibration. As a result, the sound characteristics are degraded. In addition, the vibration propagating to the conductive adhesive 33 also propagates unnecessary vibrations only in the vertical direction. Such vibrations in different directions may cause the conductive adhesive 33 to be distorted and crack.
- an adhesive 62 is applied to the entire side surface of the piezoelectric vibrator 23. Then, as shown in FIG. 7 (a), a part of the side surface of the piezoelectric vibrator 23 and the conductive adhesive 33 are not in direct contact with each other. Disappears. Therefore, it is possible to suppress generation of unnecessary vibrations caused by side forces.
- an elastic adhesive as described in the second embodiment.
- the elastic adhesive is preferably more isolated from the viewpoint of preventing generation of an unnecessary electric field.
- the elastic adhesive may be used in any of the first to fourth embodiments.
- the elastic adhesive may be used in any of the first to fourth embodiments.
- vibration to the conductive adhesive can be regulated, an unnecessary burden is not applied to the conductive adhesive, so that cracking of the conductive adhesive can be prevented and yield can be improved.
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Heart & Thoracic Surgery (AREA)
- Molecular Biology (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Pathology (AREA)
- Radiology & Medical Imaging (AREA)
- Physics & Mathematics (AREA)
- Biomedical Technology (AREA)
- Gynecology & Obstetrics (AREA)
- Medical Informatics (AREA)
- Biophysics (AREA)
- Surgery (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Mechanical Engineering (AREA)
- Ultra Sonic Daignosis Equipment (AREA)
- Transducers For Ultrasonic Waves (AREA)
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP05787677.3A EP1811807A4 (en) | 2004-10-05 | 2005-09-29 | Ultrasonic transducers |
US11/664,708 US7508118B2 (en) | 2004-10-05 | 2005-09-29 | Ultrasonic transducer |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004-292144 | 2004-10-05 | ||
JP2004292144A JP4746302B2 (ja) | 2004-10-05 | 2004-10-05 | 超音波探触子 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2006038525A1 true WO2006038525A1 (ja) | 2006-04-13 |
Family
ID=36142601
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2005/017998 WO2006038525A1 (ja) | 2004-10-05 | 2005-09-29 | 超音波探触子 |
Country Status (4)
Country | Link |
---|---|
US (1) | US7508118B2 (ja) |
EP (1) | EP1811807A4 (ja) |
JP (1) | JP4746302B2 (ja) |
WO (1) | WO2006038525A1 (ja) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9079221B2 (en) | 2011-02-15 | 2015-07-14 | Halliburton Energy Services, Inc. | Acoustic transducer with impedance matching layer |
CA2832548C (en) | 2011-04-11 | 2016-11-15 | Voldi E. Maki, Jr. | Electrical contacts to a ring transducer |
US8939556B2 (en) * | 2011-06-09 | 2015-01-27 | Hewlett-Packard Development Company, L.P. | Fluid ejection device |
US11047979B2 (en) * | 2016-07-27 | 2021-06-29 | Sound Technology Inc. | Ultrasound transducer array |
JP2020005027A (ja) * | 2018-06-25 | 2020-01-09 | パナソニックIpマネジメント株式会社 | 超音波センサー |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5666992A (en) * | 1979-11-02 | 1981-06-05 | Yokogawa Hokushin Electric Corp | Manufacture of ultrasonic probe and ultrasonic probe concerned |
JPS6132698A (ja) * | 1984-07-25 | 1986-02-15 | Toshiba Corp | 超音波プロ−ブの製造方法 |
JPS62210000A (ja) * | 1986-03-11 | 1987-09-16 | Omron Tateisi Electronics Co | 振動子 |
JPH053598A (ja) * | 1991-06-18 | 1993-01-08 | Toshiba Corp | 超音波プローブの製造方法 |
JP2001326997A (ja) * | 2000-05-16 | 2001-11-22 | Hokuriku Electric Ind Co Ltd | 圧電発音器 |
JP2004015767A (ja) * | 2002-06-12 | 2004-01-15 | Murata Mfg Co Ltd | 圧電発音体およびこの圧電発音体を用いた圧電型電気音響変換器 |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4385255A (en) * | 1979-11-02 | 1983-05-24 | Yokogawa Electric Works, Ltd. | Linear array ultrasonic transducer |
JPS5920240A (ja) | 1982-07-28 | 1984-02-01 | Asahi Chem Ind Co Ltd | 有機化合物の製造法 |
DE3585938D1 (de) * | 1984-09-26 | 1992-06-04 | Terumo Corp | Ultraschallwandler und verfahren zur herstellung desselben. |
JP2738953B2 (ja) * | 1989-04-06 | 1998-04-08 | オリンパス光学工業株式会社 | 超音波内視鏡 |
CA2139151A1 (en) * | 1994-01-14 | 1995-07-15 | Amin M. Hanafy | Two-dimensional acoustic array and method for the manufacture thereof |
US6020675A (en) * | 1995-09-13 | 2000-02-01 | Kabushiki Kaisha Toshiba | Ultrasonic probe |
JP2003518394A (ja) * | 1999-07-02 | 2003-06-10 | プロソニック カンパニー リミテッド | 線型あるいは曲線型の超音波変換器とその接続技術 |
JP4936597B2 (ja) * | 2000-02-07 | 2012-05-23 | 株式会社東芝 | 超音波プローブ及び超音波プローブ製造方法 |
US6306199B1 (en) * | 2000-04-19 | 2001-10-23 | Rexair, Inc. | Separator with multiple function vanes for a vacuum cleaner apparatus |
US20040054287A1 (en) * | 2002-08-29 | 2004-03-18 | Stephens Douglas Neil | Ultrasonic imaging devices and methods of fabrication |
-
2004
- 2004-10-05 JP JP2004292144A patent/JP4746302B2/ja not_active Expired - Lifetime
-
2005
- 2005-09-29 EP EP05787677.3A patent/EP1811807A4/en not_active Withdrawn
- 2005-09-29 WO PCT/JP2005/017998 patent/WO2006038525A1/ja active Application Filing
- 2005-09-29 US US11/664,708 patent/US7508118B2/en active Active
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5666992A (en) * | 1979-11-02 | 1981-06-05 | Yokogawa Hokushin Electric Corp | Manufacture of ultrasonic probe and ultrasonic probe concerned |
JPS6132698A (ja) * | 1984-07-25 | 1986-02-15 | Toshiba Corp | 超音波プロ−ブの製造方法 |
JPS62210000A (ja) * | 1986-03-11 | 1987-09-16 | Omron Tateisi Electronics Co | 振動子 |
JPH053598A (ja) * | 1991-06-18 | 1993-01-08 | Toshiba Corp | 超音波プローブの製造方法 |
JP2001326997A (ja) * | 2000-05-16 | 2001-11-22 | Hokuriku Electric Ind Co Ltd | 圧電発音器 |
JP2004015767A (ja) * | 2002-06-12 | 2004-01-15 | Murata Mfg Co Ltd | 圧電発音体およびこの圧電発音体を用いた圧電型電気音響変換器 |
Non-Patent Citations (1)
Title |
---|
See also references of EP1811807A4 * |
Also Published As
Publication number | Publication date |
---|---|
EP1811807A4 (en) | 2016-09-28 |
JP4746302B2 (ja) | 2011-08-10 |
EP1811807A1 (en) | 2007-07-25 |
US7508118B2 (en) | 2009-03-24 |
JP2006109030A (ja) | 2006-04-20 |
US20080018206A1 (en) | 2008-01-24 |
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