DE102008011399A1 - Ultrasonic transducer has piezoelectric element with two electrodes, which has electrical contact with related electric connection of ultrasonic transducer, where electrode is formed by conductive film - Google Patents
Ultrasonic transducer has piezoelectric element with two electrodes, which has electrical contact with related electric connection of ultrasonic transducer, where electrode is formed by conductive film Download PDFInfo
- Publication number
- DE102008011399A1 DE102008011399A1 DE102008011399A DE102008011399A DE102008011399A1 DE 102008011399 A1 DE102008011399 A1 DE 102008011399A1 DE 102008011399 A DE102008011399 A DE 102008011399A DE 102008011399 A DE102008011399 A DE 102008011399A DE 102008011399 A1 DE102008011399 A1 DE 102008011399A1
- Authority
- DE
- Germany
- Prior art keywords
- ultrasonic transducer
- piezoelectric element
- electrode
- conductive foil
- electrodes
- 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
Links
- 239000011888 foil Substances 0.000 claims description 28
- 239000002184 metal Substances 0.000 claims description 3
- 229910052751 metal Inorganic materials 0.000 claims description 3
- 230000005684 electric field Effects 0.000 description 4
- 239000000919 ceramic Substances 0.000 description 3
- 238000005476 soldering Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000002604 ultrasonography Methods 0.000 description 2
- BUHVIAUBTBOHAG-FOYDDCNASA-N (2r,3r,4s,5r)-2-[6-[[2-(3,5-dimethoxyphenyl)-2-(2-methylphenyl)ethyl]amino]purin-9-yl]-5-(hydroxymethyl)oxolane-3,4-diol Chemical compound COC1=CC(OC)=CC(C(CNC=2C=3N=CN(C=3N=CN=2)[C@H]2[C@@H]([C@H](O)[C@@H](CO)O2)O)C=2C(=CC=CC=2)C)=C1 BUHVIAUBTBOHAG-FOYDDCNASA-N 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000007772 electrode material Substances 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000028161 membrane depolarization Effects 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000004382 potting Methods 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
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
- B06B1/06—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
- B06B1/0644—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 a single piezoelectric element
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K9/00—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers
- G10K9/12—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers electrically operated
- G10K9/122—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers electrically operated using piezoelectric driving means
-
- 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
-
- 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
- H10N30/875—Further connection or lead arrangements, e.g. flexible wiring boards, terminal pins
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
- Transducers For Ultrasonic Waves (AREA)
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
Abstract
Description
Die Erfindung betrifft einen Ultraschallwandler mit einem piezoelektrischen Element, das zwei Elektroden aufweist, die jeweils mit einer zugehörigen elektrischen Schaltung des Ultraschallwandlers elektrisch verbunden sind, wobei mindestens eine Elektroden aus einer leitfähigen Folie gebildet ist, die großflächig auf dem piezoelektrischen Element aufgebracht ist.The The invention relates to an ultrasonic transducer with a piezoelectric Element having two electrodes, each with an associated electrical circuit of the ultrasonic transducer electrically connected are at least one electrode of a conductive Foil is formed, the large area on the piezoelectric Element is applied.
Zur Schallerzeugung und -sensierung werden in Ultraschallwandlern in der Regel piezoelektrische Keramiken bzw. piezoelektrische Elemente eingesetzt. Diese piezoelektrischen Elemente müssen einem elektrischen Feld ausgesetzt werden, damit sie eine mechanische Bewegung erzeugen. Dazu werden typischerweise zwei gegenüberliegende Seiten mit Elektroden versehen. Diese Elektroden zur Erzeugung des elektrischen Felds werden meist direkt auf die piezoelektrischen Elemente aufgedruckt oder gesputtert. Danach werden die Elektroden dann elektrisch kontaktiert. Dies erfolgt in der Regel durch dünne Drähte, die an diese Elektroden angelötet werden. Dabei ist die Handhabung und die Lötung dieser dünnen Drähte, die meist einen Durchmesser von weniger als 50 μm haben, sehr schwierig. Erschwerend kommt hinzu, daß das Elektrodenmaterial selbst häufig nur schwer zu löten ist und die Keramik gut wärmeleitend ist, so daß auch die erforderlichen Temperaturen, die für die Lötung erforderlich sind, nur schwer aufgebaut werden können. Durch zu hohe Temperaturen kann auch eine teilweise Depolarisation der Keramik erfolgen, die die Leistungsfähigkeit der elektromechanischen Wandlung negativ beeinflußt.to Sound generation and sensing are used in ultrasonic transducers in usually piezoelectric ceramics or piezoelectric elements used. These piezoelectric elements must have one be exposed to electrical field, so that they have a mechanical Generate movement. These are typically two opposite ones Sides with electrodes. These electrodes for generating the electric field are usually directly on the piezoelectric Elements printed or sputtered. After that, the electrodes become then contacted electrically. This is usually done by thin Wires that are soldered to these electrodes. Here is the handling and soldering of these thin Wires, usually a diameter of less than 50 microns have, very difficult. To make matters worse, that the Electrode material itself often difficult to solder is and the ceramic is good heat conducting, so that too the required temperatures for the soldering are necessary, difficult to set up. Too high temperatures can also cause partial depolarization the ceramics that perform the performance of the electromechanical Change negatively affected.
Ein
Ultraschallwandler der eingangs genannten Art ist in der
Der Erfindung liegt die Aufgabe zugrunde, eine Vorrichtung der eingangs genannten Art zu schaffen, mit der das Aufbringen einer Elektrode und deren Kontaktierung besonders einfach durchführbar ist.Of the Invention is the object of a device of the initially mentioned type, with the application of an electrode and their contact is particularly easy to carry out.
Die Lösung dieser Aufgabe erfolgt mit einem Ultraschallwandler mit den Merkmalen des Patentanspruchs 1. Vorteilhafte Weiterbildungen sind in den Unteransprüchen beschrieben.The This problem is solved with an ultrasonic transducer with the features of claim 1. Advantageous developments are described in the subclaims.
Bei einem Ultraschallwandler mit einem piezoelektrischen Element, das zwei Elektroden aufweist, die durch elektrische Kontakte mit einer zugehörigen Schaltung des Ultraschallsensors verbunden sind, wobei mindestens eine Elektrode aus einer leitfähigen Folie gebildet ist, die großflächig auf dem piezoelektrischen Element aufgebracht ist, ist erfindungsgemäß vorgesehen, daß die leitfähige Folie, die die Elektrode ausbildet und deren zugehörige elektrische Verbindung einstückig aus einer leitfähigen Folie gebildet sind. Dadurch wird das Aufbringen der Elektrode und deren Kontaktierung zu einem Arbeitsschritt verbunden und vereinfacht. Durch die Kombination von Elektrode und Kontaktierung können zusätzliche Elemente für die Herstellung eines elektrischen Kontaktes entfallen. Da bei der Kontaktierung der Elektrode ein Lötvorgang vermieden werden kann, ist eine Schädigung der Piezokeramik oder des piezoelektrischen Elementes durch Wärme ausgeschlossen. Durch die erfindungsgemäße Vorrichtung kann die Lage der Kontaktierung der Piezokeramik relativ frei gewählt werden.at an ultrasonic transducer having a piezoelectric element which having two electrodes, which by electrical contacts with a associated circuit associated with the ultrasonic sensor, wherein at least one electrode of a conductive foil is formed, the large area on the piezoelectric Element is applied, is provided according to the invention, that the conductive foil that forms the electrode and their associated electrical connection in one piece are formed from a conductive foil. This will the application of the electrode and its contacting to a working step connected and simplified. By the combination of electrode and Contacting can be additional elements for the production of an electrical contact omitted. Since at the Contacting the electrode a soldering process can be avoided can be, is a damage of piezoceramic or piezoelectric Element excluded by heat. By the invention Device can the position of contacting the piezoceramic relative be chosen freely.
Bevorzugt ist die leitfähige Folie eine Metallfolie. Hier bietet sich insbesondere Kupfer als Folienmaterial an. Aber auch andere Metalle oder leitfähige Kohlenstofffolien kommen in Betracht. In einer bevorzugten Ausgestaltung der Erfindung ist die leitfähige Folie vollflächig auf einer Seite des piezoelektrischen Elementes aufgebracht. Dadurch wird die gesamte Fläche des piezoelektrischen Elementes gleichmäßig und zuverlässig erfaßt und aufgrund der größeren Abmessung ist die Handhabung auch vergleichsweise vereinfacht. Die leitfähige Folie wird dabei bevorzugt mit dem piezoelektrischen Element verklebt. Die leitfähige Folie ist dabei bevorzugt als eine durchgehende Bahn ausgebildet, die sich in Richtung der Längsachse des piezoelektrischen Elementes, auf der die leitfähige Folie die Elektrode bildet, linear fortsetzt und dabei die elektrische Kontaktierung oder Kontaktleitung bildet, mit der ein entsprechender elektrischer Anschluß in dem Ultraschallwandler hergestellt wird. Alternativ ist die leitfähige Folie bevorzugt aus einer zugeschnitten Folie hergestellt. Eine solche zugeschnittene Folie kann die elektrische Kontaktierung an beliebiger Stelle des piezoelektrischen Elementes ausbilden, also auch in Winkeln von 90° zur Längsachse des piezoelektrischen Elementes. Die Breite der leitfähigen Folie ist dabei im Bereich der Elektrode bevorzugt identisch zu der Breite der leitfähigen Folie im Bereich des elektrischen Anschlusses, also des Bereichs, der über das piezoelektrische Element hinausgeht. Die leitfähige Folie wird dann bevorzugt mit einer Leiterplatte kontaktiert und kann dort geklebt oder gelötet werden.Prefers the conductive foil is a metal foil. Here offers in particular copper as a film material. But others too Metals or conductive carbon films may be considered. In a preferred embodiment of the invention, the conductive film over its entire surface on one side of the piezoelectric element applied. This will cause the entire area of the piezoelectric Element even and reliable detected and due to the larger size the handling is also comparatively simplified. The conductive Film is preferably glued to the piezoelectric element. The conductive film is preferred as a continuous Trajectory formed in the direction of the longitudinal axis of the piezoelectric element on which the conductive foil the electrode forms, linearly continued and thereby the electrical Contacting or contact line forms, with a corresponding electrical Connection is made in the ultrasonic transducer. alternative the conductive foil is preferably cut from one Foil made. Such a cut film can be the electrical contact form at any point of the piezoelectric element, So even at angles of 90 ° to the longitudinal axis of piezoelectric element. The width of the conductive Foil is preferably identical in the area of the electrode the width of the conductive foil in the electric field Terminal, so the area of the piezoelectric Element goes out. The conductive foil is then preferred contacted with a circuit board and can be glued or soldered there become.
In einer anderen bevorzugten Ausgestaltung sind die beiden sich gegenüberliegenden Seiten des piezoelektrischen Elementes mit einer leitfähigen Folie als Elektrode ausgerüstet, wobei diese jeweils gleichzeitig auch die elektrische Verbindung zu einem Anschluß des Ultraschallwandlers ausbilden.In In another preferred embodiment, the two are opposite one another Sides of the piezoelectric element with a conductive foil equipped as an electrode, each at the same time also the electrical connection to a terminal of the ultrasonic transducer form.
Nachfolgend wird die Erfindung anhand eines in der Zeichnung dargestellten Ausführungsbeispieles weiter erläutert.following the invention with reference to an embodiment shown in the drawing further explained.
Die einzige Figur der Zeichnung zeigt ein piezoelektrisches Element und dessen Kontaktierung innerhalb eines Ultraschallwandlers.The single figure of the drawing shows a piezoelectric element and its contacting within an ultrasonic transducer.
Das
piezoelektrische Element
ZITATE ENTHALTEN IN DER BESCHREIBUNGQUOTES INCLUDE IN THE DESCRIPTION
Diese Liste der vom Anmelder aufgeführten Dokumente wurde automatisiert erzeugt und ist ausschließlich zur besseren Information des Lesers aufgenommen. Die Liste ist nicht Bestandteil der deutschen Patent- bzw. Gebrauchsmusteranmeldung. Das DPMA übernimmt keinerlei Haftung für etwaige Fehler oder Auslassungen.This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.
Zitierte PatentliteraturCited patent literature
- - DE 10018355 A1 [0003] - DE 10018355 A1 [0003]
Claims (9)
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102008011399A DE102008011399A1 (en) | 2008-02-27 | 2008-02-27 | Ultrasonic transducer has piezoelectric element with two electrodes, which has electrical contact with related electric connection of ultrasonic transducer, where electrode is formed by conductive film |
KR1020090012921A KR20090092704A (en) | 2008-02-27 | 2009-02-17 | Ultrasound Transducer With a Piezoelectric Element |
JP2009046802A JP2009268070A (en) | 2008-02-27 | 2009-02-27 | Ultrasonic transducer having piezoelectric element |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102008011399A DE102008011399A1 (en) | 2008-02-27 | 2008-02-27 | Ultrasonic transducer has piezoelectric element with two electrodes, which has electrical contact with related electric connection of ultrasonic transducer, where electrode is formed by conductive film |
Publications (1)
Publication Number | Publication Date |
---|---|
DE102008011399A1 true DE102008011399A1 (en) | 2009-09-03 |
Family
ID=40911268
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE102008011399A Ceased DE102008011399A1 (en) | 2008-02-27 | 2008-02-27 | Ultrasonic transducer has piezoelectric element with two electrodes, which has electrical contact with related electric connection of ultrasonic transducer, where electrode is formed by conductive film |
Country Status (3)
Country | Link |
---|---|
JP (1) | JP2009268070A (en) |
KR (1) | KR20090092704A (en) |
DE (1) | DE102008011399A1 (en) |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3736896A1 (en) * | 1987-10-30 | 1989-05-11 | Siemens Ag | Electroacoustic transducer |
DE19725717A1 (en) * | 1997-06-18 | 1999-02-18 | Hydrometer Gmbh | Ultrasonic transducer for a liquid flowmeter |
DE10018355A1 (en) | 2000-04-13 | 2001-12-20 | Siemens Ag | Ultrasound transducer; has piezoelectric body with several transducer elements and strip conductor foil on flat side with conductive track pattern to determine arrangement of transducer elements |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS63191956A (en) * | 1987-02-04 | 1988-08-09 | Maruyasu Kogyo Kk | Method for supporting ultrasonic vibrator |
JPH0641708U (en) * | 1992-03-30 | 1994-06-03 | テルモ株式会社 | Ultrasonic probe |
CA2139151A1 (en) * | 1994-01-14 | 1995-07-15 | Amin M. Hanafy | Two-dimensional acoustic array and method for the manufacture thereof |
-
2008
- 2008-02-27 DE DE102008011399A patent/DE102008011399A1/en not_active Ceased
-
2009
- 2009-02-17 KR KR1020090012921A patent/KR20090092704A/en not_active Application Discontinuation
- 2009-02-27 JP JP2009046802A patent/JP2009268070A/en active Pending
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3736896A1 (en) * | 1987-10-30 | 1989-05-11 | Siemens Ag | Electroacoustic transducer |
DE19725717A1 (en) * | 1997-06-18 | 1999-02-18 | Hydrometer Gmbh | Ultrasonic transducer for a liquid flowmeter |
DE10018355A1 (en) | 2000-04-13 | 2001-12-20 | Siemens Ag | Ultrasound transducer; has piezoelectric body with several transducer elements and strip conductor foil on flat side with conductive track pattern to determine arrangement of transducer elements |
Also Published As
Publication number | Publication date |
---|---|
JP2009268070A (en) | 2009-11-12 |
KR20090092704A (en) | 2009-09-01 |
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OM8 | Search report available as to paragraph 43 lit. 1 sentence 1 patent law | ||
R012 | Request for examination validly filed | ||
R012 | Request for examination validly filed |
Effective date: 20150115 |
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R081 | Change of applicant/patentee |
Owner name: HELLA GMBH & CO. KGAA, DE Free format text: FORMER OWNER: HELLA KGAA HUECK & CO., 59557 LIPPSTADT, DE |
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R082 | Change of representative |
Representative=s name: PATENTANWAELTE JABBUSCH SIEKMANN & WASILJEFF, DE |
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R002 | Refusal decision in examination/registration proceedings | ||
R003 | Refusal decision now final |