EP2188415B1 - Procédé de traitement de surface d'aluminium et structure stratifiée d'un composant en aluminium dotée d'un contact électrique - Google Patents

Procédé de traitement de surface d'aluminium et structure stratifiée d'un composant en aluminium dotée d'un contact électrique Download PDF

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Publication number
EP2188415B1
EP2188415B1 EP08773923.1A EP08773923A EP2188415B1 EP 2188415 B1 EP2188415 B1 EP 2188415B1 EP 08773923 A EP08773923 A EP 08773923A EP 2188415 B1 EP2188415 B1 EP 2188415B1
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EP
European Patent Office
Prior art keywords
component
component part
aluminium
contact
electrical
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.)
Active
Application number
EP08773923.1A
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German (de)
English (en)
Other versions
EP2188415A1 (fr
Inventor
Hans-Wilhelm Wehling
Stefan Robert MÜLLER
Dietmar Gruedl
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.)
Valeo Schalter und Sensoren GmbH
Original Assignee
Valeo Schalter und Sensoren GmbH
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.)
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Publication date
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Publication of EP2188415A1 publication Critical patent/EP2188415A1/fr
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Classifications

    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
    • C23C22/78—Pretreatment of the material to be coated
    • 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
    • G10K9/18—Details, e.g. bulbs, pumps, pistons, switches or casings
    • G10K9/22—Mountings; Casings
    • 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
    • Y10T29/49117—Conductor or circuit manufacturing
    • 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
    • Y10T29/49117—Conductor or circuit manufacturing
    • Y10T29/49204—Contact or terminal manufacturing
    • 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
    • Y10T29/49117—Conductor or circuit manufacturing
    • Y10T29/49204—Contact or terminal manufacturing
    • Y10T29/49208—Contact or terminal manufacturing by assembling plural parts
    • Y10T29/4921—Contact or terminal manufacturing by assembling plural parts with bonding
    • Y10T29/49211—Contact or terminal manufacturing by assembling plural parts with bonding of fused material
    • Y10T29/49213—Metal
    • 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
    • Y10T29/49117—Conductor or circuit manufacturing
    • Y10T29/49204—Contact or terminal manufacturing
    • Y10T29/49208—Contact or terminal manufacturing by assembling plural parts
    • Y10T29/49222—Contact or terminal manufacturing by assembling plural parts forming array of contacts or terminals

Definitions

  • the invention relates to a method for surface treatment of aluminum and a layer structure of a component made of aluminum, for example for contacting a ultrasonic transducer, according to the generic features of the independent claims 1, 6 and 10.
  • ultrasonic transducers with milled or deep-drawn aluminum geometries, in which an electrical contact, in particular a ground contact, the aluminum geometries to the electrical components, such as ultrasonic transducer, must be made, for example, to achieve a reduction in EMC sensitivity .
  • an electrical contact in particular a ground contact
  • the aluminum geometries to the electrical components, such as ultrasonic transducer must be made, for example, to achieve a reduction in EMC sensitivity
  • EMC sensitivity electrostatic pressure
  • the automotive technology utraschallbasierende for example from the DE 102 37 721 A1 known environment detection systems with at least one ultrasonic sensor applied, each ultrasonic sensor emits an ultrasonic signal, which is reflected by a possible obstacle and can be received by the same ultrasonic sensor and or by other ultrasonic sensors.
  • the ultrasonic signal is generated by means of a glued on the inside of the aluminum geometry piezoceramic as an electrical component.
  • the piezokoramik is usually glued to the non teltende Aluminiumoxyd Anlagen the aluminum geometry by means of a non-conductive adhesive, with a Oxide layer on the surface of the aluminum in the short term after a surface cleaning process, for example, etching or mechanical machining, repeatedly forms.
  • solders for the necessary production of electrical connections on aluminum, but they have to be soldered with a lot of corrosive flux, which in turn has to be removed by washing. The then necessary cleaning and drying is difficult to handle in an automated production line.
  • the aluminum solder is only available as a solder wire and would possibly produce too much solder and thus too much inert mass.
  • From the DE 43 17 217 A1 is a method for the pretreatment of aluminum parts known to be welded or glued or provided with a conversion layer and a paint.
  • the oxide layer on the aluminum part is first removed with an acidic or alkaline solution.
  • the surface is treated with a Ti or Zr-containing solution to form a conversion layer.
  • this conversion layer keeps the surface electrical resistance low.
  • the invention is based on a method for producing an electrical contacting in which according to the invention advantageously in a first step, an oxide layer on the aluminum surface is removed and in a second step before a new formation of an oxide layer, the surface is sealed with a conversion layer with built-in metal ions ,
  • the removal of the oxide layer can be easily accomplished by etching and sealing the surface by a wet chemical route with zirconium or titanium metal ions.
  • a lacquer or a comparable insulation or corrosion protection medium can also be applied in a further coating step on the sealed surface.
  • the layer structure produced by the method described above on the surface of the aluminum can thus be used in a simple manner for an electrical contacting of a component.
  • the component is a piezoceramic component whose ground contact is then electrically contacted with the surface of the component made of aluminum.
  • the component has a hollow cylindrical, for example, milled or deep-drawn internal geometry with a membrane as a conclusion, on the inside of an ultrasonic transducer as an electrical component to produce an electrical ground contact can be mechanically fixed to the membrane.
  • a component may for example be a component of an ultrasonic sensor for an environment detection system mentioned in the introduction to the description in a parking assistance system in a motor vehicle.
  • the production of an electrically conductive coating with simultaneous removal of the oxide layer on aluminum is inexpensive and easily reproducible.
  • the surface thus produced allows permanent bonding with an adhesive, conductive adhesive or simple soldering.
  • the coating according to the invention can be applied inside and outside, for example, on the membrane. Inside as an electrically conductive surface, as well as corrosion protection and surface for mechanically strong bonding and on the outside as corrosion protection as well as a substrate for painting.
  • FIG. 1 Fig. 12 is a sectional view of an aluminum member for forming a diaphragm 1 for an ultrasonic transducer provided with a conversion layer 2 having the inner surface 2a and the outer surface 2b, which conducts conductivity on the inside and at the same time provides anticorrosive and adhesive property improvement preventing formation of new oxidation layers and externally providing corrosion protection with an improvement in the adhesion of a paint layer.
  • the conversion layer 2, or 2a, 2b is formed here in that in a first step, an oxide layer on the aluminum surface of the membrane 1 is removed and in a second step before a new formation of an oxide layer, the surface of the membrane 1 with the conversion layer 2, or 2a, 2b, is sealed with incorporated metal ions of zirconium or titanium.
  • the removal of the oxide layer in the first step can be done easily by etching and the sealing of the surface can be carried out in a wet-chemical way with the metal ions.
  • FIG. 2 It is shown how in the interior of the membrane 1, a piezoceramic component as an ultrasonic transducer 3 by means of a conductive adhesive 4 as a ground contact on the membrane 1 is electrically conductively joined.
  • the outer contacting of the ultrasonic transducer 3 is carried out with a contact 5 for the ground connection and a contact 6 for the other potential.
  • the ground connection takes place via a conductive surface 7 drawn around via the ultrasound transducer 3, for example with the conductive adhesive 4.
  • FIG. 3 shows an alternative of the ground connection of the ultrasonic transducer 3 to the membrane 1 via a Leitkleberraupe 8, which is guided laterally from the conductive surface of the membrane 1 to the ground contact 5 via a conductive ground surface 9 on the ultrasonic transducer 3.
  • FIG. 4 For this purpose, a cross section can be seen, which is provided with the same reference numerals.
  • FIG. 5 is still shown an alternative electrical connection of the electrically contacted on the membrane 1 ultrasonic transducer 3, in which a Lötstütztician 10 is disposed on the inner surface of the membrane 1, which contacted the ground potential of the on the inner surface of the membrane 1 electrically via the conductive adhesive 4 Ultrasonic transducer 3 is connected and then a contact with the contact 5 can be achieved.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Metallurgy (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • General Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Transducers For Ultrasonic Waves (AREA)
  • General Electrical Machinery Utilizing Piezoelectricity, Electrostriction Or Magnetostriction (AREA)

Claims (10)

  1. Procédé pour établir un contact électrique entre un composant en aluminium et un composant piézocéramique, dans lequel le contact de masse du composant piézocéramique est mis en contact électrique avec la surface du composant d'aluminium, une couche d'oxyde présente sur la surface d'aluminium étant enlevée dans une première étape,
    caractérisé en ce que
    dans une deuxième étape, avant la formation d'une couche d'oxyde, la surface est scellée par une couche de conversion dans laquelle sont incorporés des ions métalliques.
  2. Procédé selon la revendication 1, caractérisé en ce que l'enlèvement de la couche d'oxyde s'effectue par gravure chimique.
  3. Procédé selon les revendications 1 ou 2, caractérisé en ce que le scellement de la surface s'effectue par voie humide à l'aide d'ions métalliques de zirconium ou de titane.
  4. Procédé selon l'une des revendications précédentes, caractérisé en ce que le composant piézocéramique est mis en contact sur la surface scellée au moyen d'une colle adhésive (4).
  5. Procédé selon l'une des revendications précédentes, caractérisé en ce qu'un vernis ou un agent similaire d'isolation ou de protection contre la corrosion sont appliqués sur la surface scellée dans une autre étape de revêtement.
  6. Composant en aluminium présentant un contact électrique avec un composant piézocéramique dont le contact de masse est mis en contact électrique avec la surface du composant en aluminium, caractérisé en ce que le contact électrique est formé selon l'une des revendications précédentes.
  7. Composant selon la revendication 6, caractérisé en ce que le composant présente une géométrie intérieure cylindrique creuse avec une membrane (1) sur le côté intérieur de laquelle un convertisseur (3) d'ultrasons servant de composant électrique est fixé mécaniquement en établissant un contact électrique de masse (5) avec la membrane (1).
  8. Composant selon les revendications 6 ou 7, caractérisé en ce que le contact électrique de masse (5) est amené au convertisseur (3) d'ultrasons par un cordon (8) d'adhésif conducteur depuis la membrane (1).
  9. Composant selon les revendications 6 ou 7, caractérisé en ce que le contact électrique de masse (5) est amené à la membrane (1) par un point d'appui de brasage (10).
  10. Utilisation d'un composant selon les revendications 6 à 9, caractérisée en ce que le composant fait partie d'un capteur d'ultrasons d'un système de reconnaissance de l'environnement pour un système d'assistance au stationnement d'un véhicule automobile.
EP08773923.1A 2007-09-12 2008-07-09 Procédé de traitement de surface d'aluminium et structure stratifiée d'un composant en aluminium dotée d'un contact électrique Active EP2188415B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102007043479A DE102007043479A1 (de) 2007-09-12 2007-09-12 Verfahren zur Oberflächenbehandlung von Aluminium und ein Schichtaufbau eines Bauteils aus Aluminium mit einer elektrischen Kontaktierung
PCT/EP2008/005574 WO2009036826A1 (fr) 2007-09-12 2008-07-09 Procédé de traitement de surface d'aluminium et structure stratifiée d'un composant en aluminium dotée d'un contact électrique

Publications (2)

Publication Number Publication Date
EP2188415A1 EP2188415A1 (fr) 2010-05-26
EP2188415B1 true EP2188415B1 (fr) 2015-09-30

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ID=39876761

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EP08773923.1A Active EP2188415B1 (fr) 2007-09-12 2008-07-09 Procédé de traitement de surface d'aluminium et structure stratifiée d'un composant en aluminium dotée d'un contact électrique

Country Status (5)

Country Link
US (1) US8549746B2 (fr)
EP (1) EP2188415B1 (fr)
CN (1) CN101802266B (fr)
DE (1) DE102007043479A1 (fr)
WO (1) WO2009036826A1 (fr)

Cited By (1)

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Publication number Priority date Publication date Assignee Title
US10125424B2 (en) 2012-08-29 2018-11-13 Ppg Industries Ohio, Inc. Zirconium pretreatment compositions containing molybdenum, associated methods for treating metal substrates, and related coated metal substrates

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DE102009019667A1 (de) 2009-04-30 2010-11-04 Valeo Schalter Und Sensoren Gmbh Verfahren zum Ankleben piezokeramischer Bauelemente und Klebemittel zur Durchführung des Verfahrens
DE102009040028B4 (de) 2009-09-03 2016-06-23 Valeo Schalter Und Sensoren Gmbh Ultraschallwandler und Verfahren zur Herstellung eines Ultraschallwandlers
AU2013309269B2 (en) 2012-08-29 2016-03-31 Ppg Industries Ohio, Inc. Zirconium pretreatment compositions containing lithium, associated methods for treating metal substrates, and related coated metal substrates
DE102013214294B4 (de) * 2013-07-22 2021-06-24 Robert Bosch Gmbh Ultraschallsensor
DE102013022048A1 (de) * 2013-12-23 2015-06-25 Valeo Schalter Und Sensoren Gmbh Ultraschallsensor
DE102013022049A1 (de) 2013-12-23 2015-07-09 Valeo Schalter Und Sensoren Gmbh Ultraschallsensor
KR20190043155A (ko) 2016-08-24 2019-04-25 피피지 인더스트리즈 오하이오 인코포레이티드 금속 기판을 처리하기 위한 알칼리성 조성물
DE102019111742A1 (de) * 2019-05-07 2020-11-12 Valeo Schalter Und Sensoren Gmbh Ultraschallsensor-Baugruppe, Ultraschallsensorvorrichtung und Verfahren zur Herstellung einer Ultraschallsensor-Baugruppe
DE102019111741A1 (de) * 2019-05-07 2020-11-12 Valeo Schalter Und Sensoren Gmbh Kontaktierungsverfahren und Ultraschallwandlervorrichtung
DE102019219391A1 (de) * 2019-12-11 2021-06-17 Robert Bosch Gmbh Verfahren zur Herstellung einer Membran für einen Ultraschallsensor und Membran für einen Ultraschallwandler

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Publication number Priority date Publication date Assignee Title
US10125424B2 (en) 2012-08-29 2018-11-13 Ppg Industries Ohio, Inc. Zirconium pretreatment compositions containing molybdenum, associated methods for treating metal substrates, and related coated metal substrates
US10920324B2 (en) 2012-08-29 2021-02-16 Ppg Industries Ohio, Inc. Zirconium pretreatment compositions containing molybdenum, associated methods for treating metal substrates, and related coated metal substrates

Also Published As

Publication number Publication date
US20100213793A1 (en) 2010-08-26
DE102007043479A1 (de) 2009-03-19
CN101802266A (zh) 2010-08-11
US8549746B2 (en) 2013-10-08
EP2188415A1 (fr) 2010-05-26
CN101802266B (zh) 2012-01-11
WO2009036826A1 (fr) 2009-03-26

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