EP2188415A1 - 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

Info

Publication number
EP2188415A1
EP2188415A1 EP08773923A EP08773923A EP2188415A1 EP 2188415 A1 EP2188415 A1 EP 2188415A1 EP 08773923 A EP08773923 A EP 08773923A EP 08773923 A EP08773923 A EP 08773923A EP 2188415 A1 EP2188415 A1 EP 2188415A1
Authority
EP
European Patent Office
Prior art keywords
component
aluminum
membrane
electrical
oxide layer
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.)
Granted
Application number
EP08773923A
Other languages
German (de)
English (en)
Other versions
EP2188415B1 (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.)
Filing date
Publication date
Application filed by Valeo Schalter und Sensoren GmbH filed Critical Valeo Schalter und Sensoren GmbH
Publication of EP2188415A1 publication Critical patent/EP2188415A1/fr
Application granted granted Critical
Publication of EP2188415B1 publication Critical patent/EP2188415B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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 transducer For example, such components are fitted with membranes for 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.
  • Ultrasonic transducer must be made, for example, to achieve a reduction in the EMC sensitivity.
  • ultrasound-based surroundings detection systems known for example from DE 102 37 721 A1 are used with at least one ultrasound sensor, each ultrasound sensor emitting an ultrasound signal which is reflected by a possible obstacle and by the same ultrasound sensor and / or further ultrasound sensors can be received.
  • the ultrasonic signal is generated by means of a glued on the inside of the aluminum geometry piezoceramic as an electrical component.
  • the piezo-cr ⁇ ⁇ criik would not do so in the field; Aiurniniumoxyd Anlagen the
  • Glued 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.
  • the invention is based on a process for the surface treatment of aluminum for producing an electrical contact, wherein 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 with a conversion layer built-in metal ions is sealed.
  • 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 to the sealed surface in a further coating step.
  • the layer structure produced on the surface of the aluminum produced by the method described above can thus be used in a simple manner for an electrical contacting of a component.
  • the component may be, for example, 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 can be applied as an electrical component to produce an electrical ground contact to the membrane mechanically fixed.
  • 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 thus 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 eiektrisch ichitende Fiache, and 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 shows a section through an aluminum component to form a membrane for an ultrasonic transducer, which has been treated by the method according to the invention
  • FIG. 2 shows a section through a component according to FIG. 1 with an electrically contacted piezoceramic component, here an ultrasonic transducer,
  • FIG. 3 shows a section through a component according to FIG. 1 with a piezoceramic ultrasonic transducer electrically contacted via a conductive adhesive bead
  • Figure 4 shows a cross section through the component according to the figure 3 and
  • FIG. 5 shows a section through a component according to FIG. 1 with a piezoceramic ultrasonic transducer electrically contacted via a connection on the inner membrane surface.
  • FIG. 1 shows a section through an aluminum component for forming a diaphragm 1 for an ultrasonic transducer, which is provided with a conversion layer 2 having the inner surface 2a and the outer surface 2b, which produces conductivity on the inside and at the same time provides corrosion protection and improvement the sticking properties as well as a prevention of a reformation of oxidation layers and on the outside a corrosion protection with an improvement of the adhesion for a lacquer layer ausbiidet.
  • 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 shows how in the interior of the membrane 1, a piezoceramic component as an ultrasonic transducer 3 is electrically conductively bonded to the membrane 1 by means of a conductive adhesive 4 as a ground contact.
  • 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 conductive adhesive bead 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 shows a cross section for this purpose, which is provided with the same reference numerals.
  • FIG. 5 also shows an alternative electrical connection of the ultrasound transducer 3 electrically contacted on the diaphragm 1, in which a soldering support 10 is arranged on the inner surface of the diaphragm 1, electrically connected to the ground potential of the diaphragm 1 on the inner surface Leitkleber 4 contacted ultrasonic transducer 3 is connected and then a contact with the contact 5 can be achieved.

Landscapes

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

Abstract

L'invention concerne un procédé de traitement de surface d'aluminium en vue de réaliser un contact électrique ainsi qu'un composant correspondant, le procédé enlevant dans une première étape une couche d'oxyde de la surface d'aluminium, par exemple par attaque chimique, et, dans une deuxième étape exécutée avant la reformation d'une couche d'oxyde, la surface étant recouverte de manière étanche par voie chimique en conditions humides d'une couche de conversion qui contient des ions métalliques de zirconium ou de titane.
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 true EP2188415A1 (fr) 2010-05-26
EP2188415B1 EP2188415B1 (fr) 2015-09-30

Family

ID=39876761

Family Applications (1)

Application Number Title Priority Date Filing Date
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)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10400337B2 (en) 2012-08-29 2019-09-03 Ppg Industries Ohio, Inc. Zirconium pretreatment compositions containing lithium, 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
IN2015DN01537A (fr) 2012-08-29 2015-07-03 Ppg Ind Ohio Inc
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
WO2018039462A1 (fr) 2016-08-24 2018-03-01 Ppg Industries Ohio, Inc. Composition alcaline destiné au traitement de substrats métalliques
DE102019111741A1 (de) * 2019-05-07 2020-11-12 Valeo Schalter Und Sensoren Gmbh Kontaktierungsverfahren und Ultraschallwandlervorrichtung
DE102019111742A1 (de) * 2019-05-07 2020-11-12 Valeo Schalter Und Sensoren Gmbh Ultraschallsensor-Baugruppe, Ultraschallsensorvorrichtung und Verfahren zur Herstellung einer Ultraschallsensor-Baugruppe
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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Also Published As

Publication number Publication date
CN101802266A (zh) 2010-08-11
DE102007043479A1 (de) 2009-03-19
EP2188415B1 (fr) 2015-09-30
CN101802266B (zh) 2012-01-11
US8549746B2 (en) 2013-10-08
WO2009036826A1 (fr) 2009-03-26
US20100213793A1 (en) 2010-08-26

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