DE4127743A1 - Aluminium@ foil for electrolytic capacitors - is vacuum-coated on both sides with aluminium@/alumina insulating film - Google Patents
Aluminium@ foil for electrolytic capacitors - is vacuum-coated on both sides with aluminium@/alumina insulating filmInfo
- Publication number
- DE4127743A1 DE4127743A1 DE19914127743 DE4127743A DE4127743A1 DE 4127743 A1 DE4127743 A1 DE 4127743A1 DE 19914127743 DE19914127743 DE 19914127743 DE 4127743 A DE4127743 A DE 4127743A DE 4127743 A1 DE4127743 A1 DE 4127743A1
- Authority
- DE
- Germany
- Prior art keywords
- aluminum
- foil
- coating
- vacuum
- 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
Links
- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 52
- 239000003990 capacitor Substances 0.000 title claims abstract description 9
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 title claims abstract description 8
- 239000011888 foil Substances 0.000 claims abstract description 26
- 238000000576 coating method Methods 0.000 claims abstract description 13
- 239000011248 coating agent Substances 0.000 claims abstract description 11
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 6
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 6
- 239000001301 oxygen Substances 0.000 claims abstract description 6
- 229910052698 phosphorus Inorganic materials 0.000 claims abstract description 6
- 238000001771 vacuum deposition Methods 0.000 claims abstract description 6
- 229910052804 chromium Inorganic materials 0.000 claims abstract description 5
- 229910052751 metal Inorganic materials 0.000 claims abstract description 5
- 239000002184 metal Substances 0.000 claims abstract description 5
- 150000002739 metals Chemical class 0.000 claims abstract description 5
- 229910052715 tantalum Inorganic materials 0.000 claims abstract description 5
- 229910052719 titanium Inorganic materials 0.000 claims abstract description 5
- 239000002245 particle Substances 0.000 claims abstract 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 49
- 238000000034 method Methods 0.000 claims description 28
- 150000002500 ions Chemical class 0.000 claims description 14
- 238000007740 vapor deposition Methods 0.000 claims description 5
- 150000001875 compounds Chemical class 0.000 claims description 4
- 238000005530 etching Methods 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 claims description 4
- 229910052726 zirconium Inorganic materials 0.000 claims description 4
- 238000010894 electron beam technology Methods 0.000 claims description 3
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 claims description 3
- 235000010210 aluminium Nutrition 0.000 claims 25
- 230000000087 stabilizing effect Effects 0.000 claims 5
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims 4
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims 4
- 239000011574 phosphorus Substances 0.000 claims 4
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims 3
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 claims 3
- 239000011651 chromium Substances 0.000 claims 3
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 claims 3
- 239000010936 titanium Substances 0.000 claims 3
- 238000009423 ventilation Methods 0.000 claims 2
- 239000004411 aluminium Substances 0.000 claims 1
- 238000000151 deposition Methods 0.000 claims 1
- 230000008021 deposition Effects 0.000 claims 1
- 239000013078 crystal Substances 0.000 abstract description 3
- 230000003019 stabilising effect Effects 0.000 abstract 2
- 229910052593 corundum Inorganic materials 0.000 abstract 1
- 238000005868 electrolysis reaction Methods 0.000 abstract 1
- 231100000331 toxic Toxicity 0.000 abstract 1
- 230000002588 toxic effect Effects 0.000 abstract 1
- 229910001845 yogo sapphire Inorganic materials 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 5
- 239000003792 electrolyte Substances 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 3
- 230000008020 evaporation Effects 0.000 description 3
- 238000001704 evaporation Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- VSCWAEJMTAWNJL-UHFFFAOYSA-K aluminium trichloride Chemical compound Cl[Al](Cl)Cl VSCWAEJMTAWNJL-UHFFFAOYSA-K 0.000 description 2
- 238000009833 condensation Methods 0.000 description 2
- 230000005494 condensation Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 101100346656 Drosophila melanogaster strat gene Proteins 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000005275 alloying Methods 0.000 description 1
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 description 1
- 239000002585 base Substances 0.000 description 1
- 238000001311 chemical methods and process Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000002985 plastic film Substances 0.000 description 1
- 229920006255 plastic film Polymers 0.000 description 1
- 238000002203 pretreatment Methods 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
- 238000007788 roughening Methods 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 238000000992 sputter etching Methods 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 238000010025 steaming Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 238000010626 work up procedure Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G9/00—Electrolytic capacitors, rectifiers, detectors, switching devices, light-sensitive or temperature-sensitive devices; Processes of their manufacture
- H01G9/004—Details
- H01G9/04—Electrodes or formation of dielectric layers thereon
- H01G9/048—Electrodes or formation of dielectric layers thereon characterised by their structure
-
- 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
- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
- C23C14/02—Pretreatment of the material to be coated
- C23C14/021—Cleaning or etching treatments
- C23C14/022—Cleaning or etching treatments by means of bombardment with energetic particles or radiation
-
- 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
- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
- C23C14/06—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the coating material
- C23C14/08—Oxides
- C23C14/081—Oxides of aluminium, magnesium or beryllium
-
- 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
- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
- C23C14/06—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the coating material
- C23C14/14—Metallic material, boron or silicon
-
- 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
- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
- C23C14/22—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the process of coating
- C23C14/225—Oblique incidence of vaporised material on substrate
-
- 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
- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
- C23C14/22—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the process of coating
- C23C14/24—Vacuum evaporation
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Power Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Physical Vapour Deposition (AREA)
Abstract
Description
Die Erfindung betrifft eine Aluminiumfolie mit erhöhter spe zifischer Flächenkapazität, die als Katode in Elektrolytkon densatoren eingesetzt wird und das Verfahren zu deren Her stellung durch Vakuumbeschichtung.The invention relates to an aluminum foil with increased spe specific area capacity, which acts as a cathode in electrolyte con capacitors is used and the process for their manufacture position by vacuum coating.
Es ist allgemein bekannt, in Elektrolytkondensatoren einge setzte Aluminiumfolien zur Gewährleistung einer hohen spe zifischen Flächenkapazität auf beiden Seiten aufzurauhen. Dieses Aufrauhen und damit das Vergrößern der Oberfläche durch chemisches oder elektrochemisches Herauslösen von me tallischem Aluminium aus der Folienoberfläche erfolgt durch dessen Umwandlung in beispielsweise Aluminiumhydroxid oder Aluminiumchlorid. Nachteilig ist dabei, daß die Aufarbeitung der verwendeten aggressiven Ätzlösungen aus Gründen des Um weltschutzes einen hohen Aufwand erfordert. Darüber hinaus müssen die Folien nach dem Ätzen ausreichend mit Wasser ge spült werden, so daß außerdem eine umfangreiche Wasserver- und -entsorgung notwendig ist. Weiterhin sind zur Erzeugung einer hohen spezifischen Kapazität spezielle Vorbehandlungen der Ausgangsglattfolie oder legierungstechnische Maßnahmen erforderlich.It is well known to be used in electrolytic capacitors used aluminum foils to ensure a high spec roughen specific surface area on both sides. This roughening and thus enlarging the surface by chemical or electrochemical extraction of me metallic aluminum from the film surface is made by its conversion into, for example, aluminum hydroxide or Aluminum chloride. The disadvantage here is that the workup of the aggressive etching solutions used for reasons of order environmental protection requires a lot of effort. Furthermore After etching, the foils must be sufficiently saturated with water be rinsed so that extensive water and disposal is necessary. Furthermore are for generation a high specific capacity special pretreatments the initial smooth film or alloying measures required.
Weiterhin ist ein Verfahren bekannt, bei dem die Rauhigkeit einer bereits geätzten Folie durch Aufdampfen von Ti noch verstärkt wird (ER-PS 02 72 926). Infolge der Notwendigkeit eines Ätzprozesses vor dem Bedampfen werden auch bei diesem Verfahren die obengenannten Nachteile nicht vermieden.A method is also known in which the roughness an already etched foil by vapor deposition of Ti is strengthened (ER-PS 02 72 926). As a result of the need an etching process before vapor deposition are also used in this Procedure does not avoid the disadvantages mentioned above.
Es ist auch ein Verfahren bekannt, bei dem zum Vermeiden die ser Nachteile die notwendige Oberflächenvergrößerung durch Aufdampfen einer porösen Schicht auf Al- oder Kunststoffolien erfolgt (DE-OS 30 29 171). Die Porosität wird dadurch er reicht, daß das Aufdampfen unter einem möglichst kleinen Win kel gegen die Substratoberfläche erfolgt. Poröse Filme haben jedoch den Nachteil, daß die Grenzfläche zwischen dem Sub strat und dem aufgedampften Film eine Schwachstelle der Haf tung darstellt und die aufgedampfte Schicht unter Einwirken des Betriebselektrolyten leicht abgelöst wird und somit eine geringe Stabilität aufweist.A method is also known in which to avoid the The disadvantages of the necessary surface enlargement Evaporation of a porous layer on aluminum or plastic films takes place (DE-OS 30 29 171). This makes the porosity it is sufficient that the vapor deposition is as small as possible kel against the substrate surface. Have porous films however, the disadvantage that the interface between the sub strat and the evaporated film a weak point of the Haf represents and the evaporated layer under action of the operating electrolyte is easily detached and thus a has low stability.
Der Erfindung liegt die Aufgabe zugrunde, eine Aluminiumfo lie für Elektrolytkondensatoren mit hoher spezifischer Flä chenkapazität und hoher Stabilität, sowie ein Verfahren zu deren Herstellung zu schaffen, wobei chemische bzw. elektro chemische Prozesse bei der Herstellung vermieden werden sol len. Das Verfahren soll umweltfreundlich sein. Das Verfahren soll mit konventionellen Vakuum-Beschichtungsanlagen, d. h. Bedampfungsanlagen, ausführbar sein.The invention has for its object an aluminum foil lie for electrolytic capacitors with high specific area chenkapacity and high stability, as well as a process to to create their manufacture, chemical or electro chemical processes in production should be avoided len. The process should be environmentally friendly. The procedure should with conventional vacuum coating systems, d. H. Steaming systems, be executable.
Erfindungsgemäß wird die Aufgabe, die Aluminiumfolie und das Verfahren zur Herstellung derselben, nach den Merkmalen der Ansprüche 1 und 3 gelöst. Weitere Ausgestaltungen zeigen die Unteransprüche.According to the invention, the task of aluminum foil and Process for producing the same, according to the characteristics of Claims 1 and 3 solved. Further configurations show the Subclaims.
Die geforderten Eigenschaften der Aluminiumfolie werden im wesentlichen dadurch erreicht, daß das aufgebrachte Alumi nium in der Schicht in Form von stengelförmigen Kristallen vorliegt, die vom Aluminiumoxid eingehüllt sind. Durch die mäanderförmigeanordnung der Kristallite, die durch Oxidpha sen voneinander isoliert sind, wird offenbar eine große "innere" Oberfläche erzeugt, die die große spezifische Flä chenkapazität erzeugt. Verstärkt wird dieser Effekt noch durch eine gewisse Mikrorauhigkeit der Oberfläche infolge der stengelförmigen Kristallite. Durch den erfindungsgemäßen Schichtaufbau und das Vermeiden der Porosität wird eine hohe Adhäsion der Schicht gegenüber der Grundfolie aus Aluminium gewährleistet.The required properties of the aluminum foil are in the essentially achieved in that the applied aluminum nium in the layer in the form of stem-shaped crystals is present, which are enveloped by the aluminum oxide. Through the meandering arrangement of the crystallites by Oxidpha isolated from each other, apparently will be a big one "inner" surface that creates the large specific area generated capacity. This effect is reinforced due to a certain microroughness of the surface the stem-shaped crystallites. By the invention Layer build-up and avoiding porosity becomes high Adhesion of the layer to the base film made of aluminum guaranteed.
Das Einbringen von Ventilmetallen, wie Ti, Ta, Zr bzw. deren Verbindungen, dient zu einer weiteren Erhöhung der spezifi schen Oberflächenkapazität, und das Zusetzen von Stabilisie rungselementen, wie P oder Cr bzw. deren Verbindungen, erhöht die Beständigkeit der Schicht gegenüber dem Betriebselektro lyten.The introduction of valve metals such as Ti, Ta, Zr or their Connections, serves to further increase the specific surface capacity, and the addition of stabilizer tion elements, such as P or Cr or their compounds, increased the resistance of the layer to the operating electronics lyten.
Ein wesentliches Merkmal des Verfahrens zur Herstellung der Aluminiumfolie ist der Auftreffwinkel des Aluminiumdampfes relativ zur Folienoberfläche zu Beginn der Beschichtung. Der Auftreffwinkel darf nicht zu klein sein, denn ein Aufdampfen mit zu kleinem Winkel zu Beginn der Schichtbildung führt zu porösen Schichten und unzureichender Schichthaftung (siehe DE-OS 30 29 171). Es wurde gefunden, daß bei der genannten Ioneneinwirkung der Auftreffwinkel zu Beginn der Schichtbil dung mehr als 30° betragen muß. Ohne Ioneneinwirkung muß der Auftreffwinkel zu Beginn der Schichtbildung sogar mehr als 60° betragen. Die Ioneneinwirkung hat weiterhin den Vorteil, daß trotz des ungewöhnlich hohen Sauerstoffpartialdruckes und der ungewöhnlich hohen Bedampfungsrate der Sauerstoff che misch mit dem Aluminiumdampf reagiert und nicht nur physika lisch in die Schicht eingebaut wird. Die durch die Ionenein wirkung angeregten bzw. ionisierten Aluminium- und Sauer stoffatome verbinden sich beim Kondensationsprozeß mit hoher Reaktivität zu Aluminiumoxid, welches sich an den Korngrenzen der Kristallite anreichert, so daß sich zwischen den Kristal liten eine dünne isolierende Oxidhaut ausbildet.An essential feature of the process for producing the Aluminum foil is the angle of impact of the aluminum vapor relative to the film surface at the beginning of the coating. The Impact angle must not be too small, because vapor deposition with too small an angle at the beginning of the layer formation leads to porous layers and insufficient layer adhesion (see DE-OS 30 29 171). It was found that the above Ion impact of the angle of incidence at the beginning of the layer bil must be more than 30 °. Without the influence of ions Angle of impact at the beginning of the layer formation even more than Be 60 °. The effect of ions also has the advantage that despite the unusually high oxygen partial pressure and the unusually high evaporation rate of the oxygen che mixes with the aluminum vapor and not just physics is built into the layer. The through the ions effect of excited or ionized aluminum and acid Substance atoms combine with high ones in the condensation process Reactivity to alumina, which is at the grain boundaries the crystallite accumulates, so that between the crystals liten forms a thin insulating oxide skin.
Es wurde gefunden, daß die Abmessungen der entstehenden Kri stallite umso kleiner sind, je höher der Aluminiumoxidgehalt der Schichten ist.It was found that the dimensions of the Kri the smaller the stallite, the higher the alumina content of the layers is.
Zur Erhöhung der Haftfestigkeit und Stabilität der Schicht im Betriebselektrolyten ist es vorteilhaft, außer dem Min dest-Auftreffwinkel zu Beginn der Schichtbildung und der Io neneinwirkung bei der Beschichtung jede zu beschichtende Sei te der Aluminiumfolie vor der Beschichtung einem Ionenätzpro zeß zu unterwerfen. Dabei ist es wichtig, daß dieser in einem Vakuumdurchlauf vor der Beschichtung, d. h. ohne Zwischenbe lüftung der Oberfläche erfolgt. Eine hohe Beschichtungsrate unter Ioneneinwirkung während der reaktiven Aluminiumbe schichtung wird vorteilhafterweise erreicht, indem das Alumi nium mittels eines Elektronenstrahl-Linienverdampfers ver dampft wird und die dabei rückgestreuten Elektronen zur Ionisierung von Aluminiumdampf und Sauerstoff genutzt wer den. Dieser Ionisierungseffekt kann noch verstärkt werden, indem die rückgestreuten Elektronen durch ein Magnetfeld zwischen Verdampfertiegel und zu beschichtender Aluminium folie auf Kreisbahnen gezwungen werden, wodurch sich ihre Bahn innerhalb der Dampfwolke verlängert und sich somit die Ionisierungswahrscheinlichkeit erhöht.To increase the adhesive strength and stability of the layer in the operating electrolyte it is advantageous, except for the min least impact angle at the beginning of layer formation and the Io each coating to be coated of the aluminum foil before coating with an ion etching pro to submit to. It is important that this in one Vacuum pass before coating, d. H. without interim the surface is ventilated. A high coating rate under the influence of ions during the reactive aluminum process Layering is advantageously achieved by the aluminum nium using an electron beam line evaporator is vaporized and the backscattered electrons Ionization of aluminum vapor and oxygen is used the. This ionization effect can be intensified by the backscattered electrons through a magnetic field between the evaporator crucible and the aluminum to be coated film are forced on circular orbits, causing their The path within the steam cloud is extended and thus the Ionization probability increased.
Es ist weiterhin möglich, die Ionisierung von Aluminium dampf und Sauerstoff durch Einwirkung einer an sich bekann ten Ionen- oder Plasmaquelle im Bereich zwischen Verdampfer tiegel und zu beschichtender Folie zu bewirken. Diese Ioni sierungsquellen können zusätzlich zur Ionisierung durch rück gestreute Elektronen beim Elektronenstrahlverdampfer aber auch beim Aluminiumverdampfen nach anderen Verfahren einge setzt werden. Eine weitere Verstärkung der Ioneneinwirkung während der Kondensation auf der Folienoberfläche ist dadurch möglich, daß die zu beschichtende Aluminiumfolie gegenüber dem Verdampfer auf eine Biss-Spannung gelegt wird. Dadurch werden die Ionen auf die Folienoberfläche beschleunigt und bewirken auf Grund ihrer höheren Energie eine weitere Erhö hung der Haftfestigkeit und Kompaktheit der aufwachsenden Schicht.It is still possible to ionize aluminum steam and oxygen through the action of one known per se ion or plasma source in the area between the evaporator to effect crucible and film to be coated. This ioni Sources of ionization can, in addition to ionization by back scattered electrons in the electron beam evaporator also used in aluminum evaporation by other methods be set. A further intensification of the influence of ions this is during the condensation on the film surface possible that the aluminum foil to be coated opposite the evaporator is set to a bite voltage. Thereby the ions are accelerated onto the film surface and cause a further increase due to their higher energy adhesion and compactness of the growing Layer.
An einem Beispiel wird die Erfindung näher beschrieben. In der zugehörigen Zeichnung ist die Struktur der erfindungsge mäß erzeugten Schicht in 170 000facher Vergrößerung abgebil det.The invention is described in more detail using an example. In the accompanying drawing is the structure of the fiction according to the generated layer in 170,000 times magnification det.
Die stengelförmigen Aluminium-Kristallite sind deutlich zu erkennen, die voneinander durch Aluminiumoxid-Phasen getrennt sind. Die aufgebrachte Schicht ist 2,4 µm dick und befindet sich auf einer 30 µm dicken Aluminiumfolie. The stem-shaped aluminum crystallites are clearly closed recognize that separated from each other by alumina phases are. The applied layer is 2.4 µm thick and is located on a 30 µm thick aluminum foil.
Die spezifische Flächenkapazität einer derart beschichteten Aluminiumfolie wurde bei 100 Hz in verschiedenen Elektroly ten gemessen und mit einer nach bekannter Technologie elek trochemisch geätzten Folie gleicher Dicke verglichen.The specific surface capacity of such a coated Aluminum foil was at 100 Hz in various electrolytes ten measured and with an elec compared to a chemically etched film of the same thickness.
Die experimentell ermittelten Kapazitätswerte sind nur ver ständlich, wenn man annimmt, daß die Oberflächen der Kri stallite maßgeblich zur Kapazitätsbildung beitragen, obwohl eine exakte Erklärung dieses Phänomens bisher noch nicht möglich ist.The experimentally determined capacitance values are only ver of course, if one assumes that the surfaces of the Kri stallite contribute significantly to capacity building, though an exact explanation of this phenomenon is not yet available is possible.
Claims (14)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19914127743 DE4127743C2 (en) | 1991-08-22 | 1991-08-22 | Surface-enlarged aluminum foil for electrolytic capacitors and vacuum coating processes for their production |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19914127743 DE4127743C2 (en) | 1991-08-22 | 1991-08-22 | Surface-enlarged aluminum foil for electrolytic capacitors and vacuum coating processes for their production |
Publications (2)
Publication Number | Publication Date |
---|---|
DE4127743A1 true DE4127743A1 (en) | 1993-03-04 |
DE4127743C2 DE4127743C2 (en) | 1994-05-11 |
Family
ID=6438811
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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DE19914127743 Expired - Fee Related DE4127743C2 (en) | 1991-08-22 | 1991-08-22 | Surface-enlarged aluminum foil for electrolytic capacitors and vacuum coating processes for their production |
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Cited By (12)
Publication number | Priority date | Publication date | Assignee | Title |
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EP0940828A2 (en) * | 1998-03-03 | 1999-09-08 | Acktar Ltd. | Method for producing foil electrodes |
EP0966008A2 (en) * | 1998-04-20 | 1999-12-22 | Becromal S.p.A. | Manufacturing method of an anode for electrolytic capacitors, anode fabricated by this method and capacitor containing such and anode |
EP1045409A2 (en) * | 1999-04-14 | 2000-10-18 | Becromal S.p.A. | Electrodes for electrolytic capacitors and production process thereof |
US6865071B2 (en) | 1998-03-03 | 2005-03-08 | Acktar Ltd. | Electrolytic capacitors and method for making them |
WO2009064220A3 (en) * | 2007-11-12 | 2009-07-02 | Obschestvo S Ogranichennoi Otv | Multilayer anode |
US7709082B2 (en) | 2006-01-12 | 2010-05-04 | Acktar Ltd. | Electrodes, printing plate precursors and other articles including multi-strata porous coatings, and method for their manufacture |
US20110038098A1 (en) * | 2008-04-22 | 2011-02-17 | Toyo Aluminium Kabushiki Kaisha | Electrode material for aluminum electrolytic capacitor and process for producing the electrode material |
WO2012032407A3 (en) * | 2010-09-06 | 2012-06-28 | OÜ Skeleton Technologies | Supercapacitor with high specific density and energy density and method of manufacturing such supercapacitor |
US9001497B2 (en) | 2010-03-16 | 2015-04-07 | Panasonic Intellectual Property Management Co., Ltd. | Electrode foil and capacitor using same |
US9202634B2 (en) | 2012-02-10 | 2015-12-01 | Toyo Aluminium Kabushiki Kaisha | Method for manufacturing electrode material for aluminum electrolytic capacitor |
US9330851B2 (en) | 2011-07-15 | 2016-05-03 | Toyo Aluminium Kabushiki Kaisha | Electrode material for aluminum electrolytic capacitor, and method for producing same |
US9378897B2 (en) | 2011-05-26 | 2016-06-28 | Toyo Aluminium Kabushiki Kaisha | Electrode material for aluminum electrolytic capacitor, and process for producing same |
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EP0272926A2 (en) * | 1986-12-24 | 1988-06-29 | Showa Aluminum Kabushiki Kaisha | An aluminum capacitor plate for electrolytic capacitors and process for making same |
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EP0940828A3 (en) * | 1998-03-03 | 2001-08-16 | Acktar Ltd. | Method for producing foil electrodes |
US6287673B1 (en) | 1998-03-03 | 2001-09-11 | Acktar Ltd. | Method for producing high surface area foil electrodes |
US6865071B2 (en) | 1998-03-03 | 2005-03-08 | Acktar Ltd. | Electrolytic capacitors and method for making them |
EP0940828A2 (en) * | 1998-03-03 | 1999-09-08 | Acktar Ltd. | Method for producing foil electrodes |
EP0966008A2 (en) * | 1998-04-20 | 1999-12-22 | Becromal S.p.A. | Manufacturing method of an anode for electrolytic capacitors, anode fabricated by this method and capacitor containing such and anode |
EP0966008A3 (en) * | 1998-04-20 | 2004-02-04 | Becromal S.p.A. | Manufacturing method of an anode for electrolytic capacitors, anode fabricated by this method and capacitor containing such and anode |
EP1045409A2 (en) * | 1999-04-14 | 2000-10-18 | Becromal S.p.A. | Electrodes for electrolytic capacitors and production process thereof |
EP1045409A3 (en) * | 1999-04-14 | 2005-10-19 | Becromal S.p.A. | Electrodes for electrolytic capacitors and production process thereof |
US7709082B2 (en) | 2006-01-12 | 2010-05-04 | Acktar Ltd. | Electrodes, printing plate precursors and other articles including multi-strata porous coatings, and method for their manufacture |
US8462483B2 (en) | 2007-11-12 | 2013-06-11 | C-K Group Ltd. | Multilayer anode |
WO2009064220A3 (en) * | 2007-11-12 | 2009-07-02 | Obschestvo S Ogranichennoi Otv | Multilayer anode |
US20110038098A1 (en) * | 2008-04-22 | 2011-02-17 | Toyo Aluminium Kabushiki Kaisha | Electrode material for aluminum electrolytic capacitor and process for producing the electrode material |
US9142359B2 (en) * | 2008-04-22 | 2015-09-22 | Toyo Aluminium Kabushiki Kaisha | Electrode material for aluminum electrolytic capacitor and process for producing the electrode material |
US9001497B2 (en) | 2010-03-16 | 2015-04-07 | Panasonic Intellectual Property Management Co., Ltd. | Electrode foil and capacitor using same |
EP2469549A4 (en) * | 2010-03-16 | 2015-05-27 | Panasonic Ip Man Co Ltd | Electrode foil and capacitor using same |
WO2012032407A3 (en) * | 2010-09-06 | 2012-06-28 | OÜ Skeleton Technologies | Supercapacitor with high specific density and energy density and method of manufacturing such supercapacitor |
US9111693B2 (en) | 2010-09-06 | 2015-08-18 | Ou Skeleton Technologies Group | Super capacitor of high specific capacity and energy density and the structure of said super capacitor |
EA023133B1 (en) * | 2010-09-06 | 2016-04-29 | Ою Скелетон Технолоджис Груп | Super capacitor of high specific capacity and energy density and the structure of said super capacitor |
US9378897B2 (en) | 2011-05-26 | 2016-06-28 | Toyo Aluminium Kabushiki Kaisha | Electrode material for aluminum electrolytic capacitor, and process for producing same |
US9330851B2 (en) | 2011-07-15 | 2016-05-03 | Toyo Aluminium Kabushiki Kaisha | Electrode material for aluminum electrolytic capacitor, and method for producing same |
US9202634B2 (en) | 2012-02-10 | 2015-12-01 | Toyo Aluminium Kabushiki Kaisha | Method for manufacturing electrode material for aluminum electrolytic capacitor |
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