EP1432285B1 - Hydrophobic coating of individual hearing aid components - Google Patents
Hydrophobic coating of individual hearing aid components Download PDFInfo
- Publication number
- EP1432285B1 EP1432285B1 EP03029970.5A EP03029970A EP1432285B1 EP 1432285 B1 EP1432285 B1 EP 1432285B1 EP 03029970 A EP03029970 A EP 03029970A EP 1432285 B1 EP1432285 B1 EP 1432285B1
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- Prior art keywords
- hydrophobic coating
- components
- housing
- housing wall
- coating
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R25/00—Deaf-aid sets, i.e. electro-acoustic or electro-mechanical hearing aids; Electric tinnitus maskers providing an auditory perception
- H04R25/65—Housing parts, e.g. shells, tips or moulds, or their manufacture
- H04R25/658—Manufacture of housing parts
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R25/00—Deaf-aid sets, i.e. electro-acoustic or electro-mechanical hearing aids; Electric tinnitus maskers providing an auditory perception
- H04R25/65—Housing parts, e.g. shells, tips or moulds, or their manufacture
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R25/00—Deaf-aid sets, i.e. electro-acoustic or electro-mechanical hearing aids; Electric tinnitus maskers providing an auditory perception
- H04R25/60—Mounting or interconnection of hearing aid parts, e.g. inside tips, housings or to ossicles
- H04R25/602—Mounting or interconnection of hearing aid parts, e.g. inside tips, housings or to ossicles of batteries
Definitions
- the present invention relates to a method for the liquid-tight sealing of micro-gaps, cracks and / or openings in housing walls, uses of the method, housings of electrical or electronic devices, having gaps, capillaries, scratches, openings and the like, which prevent the ingress of liquid be sealed, but not against gas permeability, and a battery compartment of a hearing aid.
- a condenser microphone is described with a hydrophobic membrane to prevent sticking to the backplate and also various methods of achieving this hydrophobization.
- the US 2002100605 describes a hydrophobic coating for housings of electrical equipment, in particular with regard to surge arresters. Again in other documents hydrophobic coatings of substrates such as plastics, wood, concrete, etc. are described in which, however, the above-mentioned problem is not an issue.
- each hearing aid housing each having a housing part, which is provided with a hydrophobic coating in order to prevent the possible ingress of liquid through these housing parts.
- this coating is such that a certain gas permeability is ensured.
- Especially medical devices worn on the body such as pulse rate, invasive blood characteristic sensors, such as oximetry sensors, heart rate monitors, hearing aids and the like.
- invasive blood characteristic sensors such as oximetry sensors, heart rate monitors, hearing aids and the like.
- complex apparatus which consist of a variety of individual, mechanical and electronic components in different Process produced and then assembled. Because of the mechanical tolerances of the injection molded plastic parts, which in the Most cases are used for housing, battery cover, switches, and the like., Also arise in the assembled state of the devices always microscopic capillary gaps between the individual components.
- FIG. 1a shows the contact angle of water on an untreated or uncoated surface 3, such as a polymer used for hearing aid components.
- a polymer used for hearing aid components such as polyamide, ABS, etc ..
- the contact angle is according to FIG. 1a well below 80 °.
- the contact angle is now significantly increased, such as over 100 °, which corresponds approximately to the wettability of Teflon.
- FIG. 2 is schematically shown in section a capillary 11, which may be formed for example in a hearing aid housing 7.
- a capillary 11 which may be formed for example in a hearing aid housing 7.
- FIGS. 1a and 1b A comparison with the two FIGS. 1a and 1b now clearly shows that a drop of water according to FIG. 1a can easily pass through the capillary 11, while the water droplet according to FIG. 1b remains on the surface of the housing wall by penetration by the capillary 11 is impossible.
- no sealing means such as rubber seals and the like. Are arranged in the capillary 11, the gas permeability is still maintained.
- FIG. 3 shows in section the area of a battery compartment of a conventional hearing aid, which is sealed against the ingress of liquid. That's it now important that all disposed in the battery compartment 19 housing parts are provided with a hydrophobic coating. These parts include the battery cover 13, the mentioned battery compartment 19, the housing 23 and the function switch 21.
- the individual components are coated after their manufacture or delivery and before installation in a hearing aid.
- a housing such as shown in FIG. 3 This means, for example, that it is cleaned after the injection molding and, if necessary, pretreated, in order subsequently to be hydrophobically coated by one of the methods described below.
- FIG. 4 shows a further embodiment of a battery compartment of a hearing aid and again those housing parts or components are referred to, which are to be provided with a hydrophobic coating. These parts include, for example, a function or touch button 31, the battery cover 33 and a frame 35th
- a liquid protection is provided by a targeted surface treatment of individual components of an electronic or electrical device, such as individual hearing aid components achieved.
- an electronic or electrical device such as individual hearing aid components achieved.
- the components are hydrophobized is of secondary importance for the invention, since a large number of such methods are known from the prior art. In the following, for example, only a few methods will be cited for the better understanding of the present invention.
- sol-gel processes are known. These processes come from chemical nanotechnology.
- the surface is coated with hydrophobic nanoparticles embedded in a polymer network.
- These layers are composites (nanocomposites) with organic and inorganic components, which can be generated by sol-gel processes.
- the layers are applied by simple dipping or spraying processes and then cured. In principle, these layers can be applied to all materials that tolerate the necessary temperatures for curing (sintering). For most materials that are used in hearing aids, a coating on sol-gel processes is possible.
- the properties of the surface can be adjusted and hydrophobic or even antimicrobial effects can be achieved, such as in the WO03 / 094574 described.
- Nanoparticles with hydrophobic and oleophobic properties and their applications have also been described in DE10051182A1 .
- Further processes for the hydrophobic coating of polymer surfaces can be found in US 2002 / 0192385A1 or DE10106213A1 ,
- the coating takes place via low-temperature plasma evaporation processes.
- the surface is cleaned and activated (for example 02 plasma) and then coated.
- a compact polymer layer made of a fluorine-containing polymer is applied to the component or a hydrophobic molecule is attached directly to the component plastic.
- the advantages of the present invention are the following: Due to the hydrophobic coatings, for example in the area of a battery compartment, the susceptibility to corrosion in a micro-electronic device, such as For example, a medical device, such as in particular a hearing aid, be reduced by preventing the ingress of liquid or even excluded.
- the application of the inventive method is possible on old, already introduced into the market products.
- the improvement of the liquid resistance is possible without design changes.
- a device can be retrofitted in the service with hydrophobized components.
- Service intervals due to contamination or corrosion can be prolonged, i.
- the device has a longer life.
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
- General Health & Medical Sciences (AREA)
- Neurosurgery (AREA)
- Otolaryngology (AREA)
- Health & Medical Sciences (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Casings For Electric Apparatus (AREA)
- Battery Mounting, Suspending (AREA)
- Secondary Cells (AREA)
- Paints Or Removers (AREA)
Description
Die vorliegende Erfindung betrifft ein Verfahren zum flüssigkeitsdichten Abdichten von Kleinstspalten, Ritzen und/oder Öffnungen in Gehäusewandungen, Verwendungen des Verfahrens, Gehäuse von elektrischen bzw. elektronischen Geräten, aufweisend Spalten, Kapillaren, Ritzen, Öffnungen und dgl., welche gegen das Eindringen von Flüssigkeit abzudichten sind, nicht jedoch gegen Gasdurchlässigkeit, sowie ein Batteriefach eines Hörgerätes.The present invention relates to a method for the liquid-tight sealing of micro-gaps, cracks and / or openings in housing walls, uses of the method, housings of electrical or electronic devices, having gaps, capillaries, scratches, openings and the like, which prevent the ingress of liquid be sealed, but not against gas permeability, and a battery compartment of a hearing aid.
Insbesondere bei medizinischen Geräten, welche am Körper getragen werden besteht die Gefahr, dass durch Feuchtigkeit, Schweiss, etc. gewisse Teile und Komponenten des Gerätes korrodieren können bzw. nicht mehr funktionieren. Speziell führt das Eindringen von Feuchtigkeit und Schweiss in Hörgeräten zu Korrosion, beispielsweise der Batterie, und in einigen Fällen zu Störungen der Elektronik sowie der elektroakustischen Wandler. Entsprechend werden verschiedene Verfahren beschrieben, um Hörgeräte feuchtigkeitsresistenter zu machen.In particular, in medical devices that are worn on the body there is a risk that by moisture, sweat, etc. certain parts and components of the device can corrode or no longer work. Specifically, the ingress of moisture and sweat in hearing aids leads to corrosion, such as the battery, and in some cases, to electronic and electroacoustic transducer disturbances. Accordingly, various methods are described to make hearing aids more moisture resistant.
In der
In der
Die
In der
Speziell medizinische Geräte, welche am Körper getragen werden, wie Pulsfrequenzmesser, invasiv ermittelnde Bluteigenschaftssensoren, wie Oximetrie-Sensoren, Herzfrequenzmessgeräte, Hörgeräte und dgl. sind in der Regel komplexe Apparate, welche aus einer Vielzahl einzelner, mechanischer und elektronischer Komponenten bestehen, die in verschiedenen Verfahren hergestellt und anschliessend montiert werden. Wegen der mechanischen Toleranzen der Spritzgusskunststoffteile, welche in den meisten Fällen für Gehäuse, Batteriedeckel, Schalter, und dgl. verwendet werden, entstehen auch im zusammengebauten Zustand der Geräte immer mikroskopische Kapillarspalte zwischen den einzelnen Komponenten.Especially medical devices worn on the body, such as pulse rate, invasive blood characteristic sensors, such as oximetry sensors, heart rate monitors, hearing aids and the like. Are usually complex apparatus, which consist of a variety of individual, mechanical and electronic components in different Process produced and then assembled. Because of the mechanical tolerances of the injection molded plastic parts, which in the Most cases are used for housing, battery cover, switches, and the like., Also arise in the assembled state of the devices always microscopic capillary gaps between the individual components.
Weil die überragende Mehrheit dieser medizinischen Geräte, wie beispielsweise Hörgeräte, mit Zink-Luft-Batterien betrieben werden ist es nicht möglich, das Gerät hermetisch zu verschliessen, da die Batterie eine konstante Sauerstoffversorgung benötigt, um die Betriebsspannung aufrecht zu erhalten. Selbstverständlich ist diese Anforderung auch bei anderen elektronischen bzw. elektrischen Komponenten denkbar, welche eine gewisse Belüftung benötigen. Dies hat zur Folge, dass eine vollständige Dichtheit, wie teilweise im Stand der Technik beschrieben, nicht geeignet ist. Auch aufwendige mechanische Konstruktionen mittels Dichtungen und poröser Membranen, wie aus dem Stand der Technik bekannt, sind nicht geeignet und machen medizinische Geräte in der Regel grösser und teurer.Because the overwhelming majority of these medical devices, such as hearing aids, are powered by zinc-air batteries, it is not possible to hermetically seal the device because the battery requires a constant supply of oxygen to maintain the operating voltage. Of course, this requirement is also conceivable for other electronic or electrical components, which require a certain ventilation. This has the consequence that a complete tightness, as partially described in the prior art, is not suitable. Even complex mechanical constructions by means of seals and porous membranes, as known from the prior art, are not suitable and make medical devices usually larger and more expensive.
Es ist äusserst schwierig die Einflüsse von Kapillarspalten in der Designphase eines Hörgerätes bzw. generell eines medizinischen Kleinstgerätes vorauszusehen. Da jedoch mechanische Konstruktionen zur Verhinderung eines Flüssigkeitseintrittes bei bestehenden Gerätedesigns nicht mehr ohne weiteres möglich sind, ist es eine Aufgabe der vorliegenden Erfindung, die Dichtheit von medizinischen Geräten, wie insbesondere Kleinstgeräten und Hörgeräten zu erfüllen ohne Designänderungen vornehmen zu müssen. Wesentlich ist auch, dass bei vollständigem Abdichten gegen Feuchtigkeitseintritt nach wie vor eine Gasdurchlässigkeit in den Kapillarspalten vorhanden ist.It is extremely difficult to foresee the effects of capillary gaps in the design phase of a hearing aid or, in general, a medical microdevice. However, since mechanical designs to prevent liquid ingress are no longer readily available in existing device designs, it is an object of the present invention to provide for the tightness of medical devices such as, in particular, miniature devices and hearing aids without design changes. It is also essential that with complete sealing against Moisture still exists a gas permeability in the capillary gaps.
In der Entwicklung von Hörgeräten und dgl. geht der Trend immer mehr in den Bau modularer Komponenten, welche für verschiedene Geräte neu kombiniert werden können. Zur Reduktion der Arbeitszeit und -kosten und der Verbesserung der Reproduzierbarkeit wird auch beispielsweise für Im-Ohr-Hörgeräte eine höhere Modularität angestrebt. Das inhärente Problem bei modularen Systemen sind jedoch die erwähnten Kapillarspalten, die beim Zusammensetzen der einzelnen Module zu einem Gerät entstehen. Durch diese Kapillaren wird ein Eindringen von Flüssigkeit in das Hörgerät beschleunigt.In the development of hearing aids and the like, the trend is increasingly in the construction of modular components, which can be recombined for different devices. For the reduction of the working time and costs and the improvement of the reproducibility a higher modularity is also aimed for example for in-the-ear hearing aids. The inherent problem with modular systems, however, are the capillary gaps mentioned, which arise when assembling the individual modules to form a device. These capillaries accelerate the penetration of fluid into the hearing aid.
Schliesslich scheitert die Möglichkeit, das Hörgerät aus wasserabstossenden hydrophoben Werkstoffen zu bauen, welche die Benetzbarkeit und damit ein Eindringen von Flüssigkeit durch Kapillarspalten reduzieren würde an der Tatsache, dass solche Werkstoffe, wie z.B. Teflon, weder mit den üblichen Verfahren bearbeitet werden können, noch die mechanischen und ästhetischen Kriterien erfüllen.Finally, the ability to build the hearing aid from water-repellent hydrophobic materials which would reduce wettability and thus penetration of liquid through capillary gaps fails due to the fact that such materials, such as e.g. Teflon, neither can be processed by the usual methods, nor meet the mechanical and aesthetic criteria.
Erfindungsgemäss wird zur Lösung der oben geschilderten Problematik vorgeschlagen, durch gezielte, hydrophobe Beschichtung einzelner Komponenten bzw. Bereichen eine Gehäusewandung eines elektronischen oder elektrischen Gerätes, wie insbesondere eines medizinischen Gerätes, im Bereich der erwähnten Kapillarspalten, Ritzen und dgl. diese gegen einen Flüssigkeitseintritt zu schützen, indem die hydrophobe Beschichtung (Hydrophobisierung) der einzelnen Bauteile bzw. Gehäusebereiche die Oberflächenenergie des Werkstoffes erniedrigt. Dies bewirkt, dass sich Flüssigkeitstropfen, wie Wasser, Schweiss und dgl., auf der Oberfläche der Bauteile bzw. Gehäusebereiche nicht ausbreiten können, sondern sich mit einem höheren Kontaktwinkel zusammenziehen, wie dies in den
Die Erfindung wird nun beispielsweise und unter Bezug auf die beigefügten Figuren näher erläutert.The invention will now be explained in more detail by way of example and with reference to the accompanying drawings.
Dabei zeigen:
- Fig. 1a und 1b
- den Einfluss einer hydrophoben Beschichtung auf die Benetzbarkeit der beschichteten Oberfläche bzw. auf den Kontaktwinkel von Wasser auf der Oberfläche,
- Fig. 2
- im Schnitt dargestellt, eine Kapillaröffnung bzw. eine Spalte in einer Gehäusewandung, wie beispielsweise eines Hörgerätes,
- Fig. 3 und 4
- je ein Beispiel eines Batteriefaches im Schnitt eines Hörgerätes.
- Fig. 1a and 1b
- the influence of a hydrophobic coating on the wettability of the coated surface or on the contact angle of water on the surface,
- Fig. 2
- shown in section, a capillary opening or a column in a housing wall, such as a hearing aid,
- 3 and 4
- each an example of a battery compartment in the section of a hearing aid.
Durch eine hydrophobe Beschichtung auf der Oberfläche 5 wird nun der Kontaktwinkel deutlich gesteigert, wie beispielsweise über 100°, was in etwa der Benetzbarkeit von Teflon entspricht.By a hydrophobic coating on the
In
Anhand der beiden
Die einzelnen Bauteile werden nach ihrer Herstellung oder Lieferung und vor dem Einbau in ein Hörgerät beschichtet. Für ein Gehäuse, wie beispielsweise dargestellt in
Welche Komponenten von einem spezifischen Hörgeräte-Design beschichtet werden müssen um einen möglichst wirksamen Schutz gegen das Eindringen von Flüssigkeit zu gewährleisten muss für jedes Hörgerät einzeln evaluiert werden. Grundsätzlich müssen mehrere Komponenten beschichtet werden, um eine Hydrophobisierung aller Seiten eines Kapillarsystems zu erreichen, wie beispielsweise unter Bezug auf
Im Gegensatz zu den verschiedenen, eingangs beschriebenen Lösungen zum flüssigkeitsdichten Ausrüsten von Geräten wird in der vorliegenden Erfindung ein Flüssigkeitsschutz durch eine gezielte Oberflächenbehandlung einzelner Komponenten eines elektronischen oder elektrischen Gerätes, wie beispielsweise einzelner Hörgeräte-Komponenten, erreicht. Mit welchem Verfahren die Bauteile hydrophobisiert werden ist an sich für die Erfindung von zweitrangiger Bedeutung, da eine Vielzahl derartiger Verfahren aus dem Stand der Technik bekannt sind. Nachfolgend sollen lediglich einige Verfahren beispielsweise angeführt werden, für das bessere Verständnis für die vorliegende Erfindung.In contrast to the various solutions described at the beginning for the liquid-tight finishing of devices, in the present invention a liquid protection is provided by a targeted surface treatment of individual components of an electronic or electrical device, such as individual hearing aid components achieved. With which method the components are hydrophobized is of secondary importance for the invention, since a large number of such methods are known from the prior art. In the following, for example, only a few methods will be cited for the better understanding of the present invention.
Grundsätzlich bieten sich chemische und physikalische Beschichtungsverfahren an. Bekannt sind beispielsweise Beschichtungen mittels sogenannter Sol-Gel Prozesse. Diese Verfahren stammen aus der chemischen Nanotechnologie. Die Oberfläche wird mit hydrophoben Nanopartikeln beschichtet, die in ein Polymernetzwerk eingebunden sind. Diese Schichten sind Verbundwerkstoffe (Nanokomposite) mit organischen und anorganischen Komponenten, welche über Sol-Gel Prozesse erzeugt werden können. Die Schichten werden durch einfache Tauch- oder Sprühprozesse aufgetragen und anschliessend ausgehärtet. Prinzipiell lassen sich diese Schichten auf alle Materialien auftragen, die die notwendigen Temperaturen zum Aushärten (Sintern) vertragen. Für die meisten Werkstoffe, die in Hörgeräten eingesetzt werden ist eine Beschichtung über Sol-Gel Prozesse möglich. Durch die Auswahl der einzelnen chemischen Komponenten lassen sich die Eigenschaften der Oberfläche einstellen und hydrophobe oder auch antimikrobielle Effekte erzielen, wie z.B. in der
Der Vorteil dieser Beschichtungen liegt in der einfachen Handhabung und dem geringen apparativen Aufwand der nötig ist.The advantage of these coatings is the ease of use and the low expenditure on equipment is necessary.
Nanopartikel mit hydrophoben und oleophoben Eigenschaften und deren Applikationen wurden beispielsweise auch in
Selbstverständlich sind auch weitere chemische Hydrophobisierungsprozesse bekannt, wie beispielsweise unter Verwendung von Beschichtungen aus hydradisierten Silanen, fluorhaltigen Polykondensatbeschichtungen, etc..Of course, other chemical hydrophobization processes are also known, for example using coatings of hydrated silanes, fluorine-containing polycondensate coatings, etc.
Nebst chemischen Verfahren sind auch physikalische Verfahren, wie beispielsweise Beschichtungen über Plasmaverfahren, geeignet.Apart from chemical processes, physical processes, such as plasma-process coatings, are also suitable.
Die Beschichtung erfolgt über Niedertemperatur-Plasmaverdampfungsverfahren. Dabei wird im gleichen Arbeitsschritt die Oberfläche gereinigt und aktiviert (z.B. 02 Plasma) und anschliessend beschichtet. Bei der Beschichtung wird entweder eine kompakte Polymerschicht aus einem fluorhaltigen Polymer auf das Bauteil aufgebracht oder ein hydrophobes Molekül direkt an den Bauteilkunststoff angeheftet.The coating takes place via low-temperature plasma evaporation processes. In the same step, the surface is cleaned and activated (for example 02 plasma) and then coated. In the coating, either a compact polymer layer made of a fluorine-containing polymer is applied to the component or a hydrophobic molecule is attached directly to the component plastic.
Die Vorteile der vorliegenden Erfindung sind die Folgenden: Infolge der hydrophoben Beschichtungen, beispielsweise im Bereich eines Batteriefaches kann die Anfälligkeit auf Korrosion in einem elektronischen Kleinstgerät, wie beispielsweise einem medizinischen Gerät, wie insbesondere einem Hörgerät, durch Verhinderung des Flüssigkeitseintrittes vermindert oder gar ausgeschlossen werden.The advantages of the present invention are the following: Due to the hydrophobic coatings, for example in the area of a battery compartment, the susceptibility to corrosion in a micro-electronic device, such as For example, a medical device, such as in particular a hearing aid, be reduced by preventing the ingress of liquid or even excluded.
Die Anwendung des erfindungsgemässen Verfahrens ist auf alte, schon in den Markt eingeführte Produkte möglich. Die Verbesserung der Flüssigkeitsresistenz ist möglich ohne Designänderungen. Ein Gerät kann nachträglich im Service mit hydrophobisierten Bauteilen nachgerüstet werden.The application of the inventive method is possible on old, already introduced into the market products. The improvement of the liquid resistance is possible without design changes. A device can be retrofitted in the service with hydrophobized components.
Serviceintervalle bedingt durch Verschmutzung oder Korrosion können verlängert werden, d.h. das Gerät verfügt über eine längere Lebensdauer.Service intervals due to contamination or corrosion can be prolonged, i. The device has a longer life.
Bei modularen elektronischen Geräten, wie Medizinalgeräten bzw. Hörgeräten, mit vielen Kapillarspalten ist eine Verminderung/Veränderung des Wassereintrittes möglich. Dadurch fallen aufwendige, mechanische Dichtungen weg und die Geräte können kleiner und kostengünstiger gebaut werden.In modular electronic devices, such as medical devices or hearing aids, with many capillary columns a reduction / change of water ingress is possible. This eliminates expensive, mechanical seals away and the devices can be built smaller and cheaper.
Claims (12)
- Method for the liquid impervious sealing of small crevices, chinks and/or capillaries in a housing wall which occur due to the assembly of at least two components, characterized in that said components at least in the area of the crevices, chinks and/or capillaries are provided with a hydrophobic coating.
- Method according to claim 1, characterized in that all components of the housing wall at least in the area of the crevice, chink or capillary are provided with a hydrophobic coating.
- Method according to claims 1 or 2, characterized in that the housing wall or its surface, respectively, in the area of the crevices, chinks, capillaries, or openings are coated by means of hydrophobic nanoparticles.
- Method according to any of claims 1 to 3, characterized in that the hydrophobic coating by means of hydrophobic nanoparticles is produced by a so called Sol-Gel process.
- Method according to one of claims 1 or 2, characterized in that the hydrophobic coating is achieved by coating the housing wall by means of hydrated silanes or fluorine containing polycondensates.
- Method according to one of claims 1 or 2, characterized in that the coating is achieved by means of low temperature plasma evaporation processes, wherein during the coating process a compact polymer layer, preferably consisting of a fluorine containing polymer, is deposited on the housing wall.
- Use of the method according to any of claims 1 to 6 for the liquid impervious sealing of crevices, chinks or capillary openings in housing walls of electric or electronic smallest devices, such as in particular smallest devices in the medical field, such as in particular hearing devices.
- Use of the method according to any of claims 1 to 6 for the liquid impervious sealing of a battery compartment within a hearing device.
- Housing of electric or electronic smallest devices comprising small crevices, capillary openings or chinks in the housing wall which occur due to the assembly of at least two components, characterized in that the single components of the housing wall at least in the area of the crevices, chinks or capillaries are provided with a hydrophobic coating.
- Housing according to claim 9, characterized in that the hydrophobic coating is such that the minimal contact angle of water at room temperature is at least 100°.
- Housing according to claims 9 or 10, characterized in that the hydrophobic coating comprises a layer thickness which is ≤ 5 micrometer.
- Battery compartment of a hearing device, characterized in that all components or parts in the area of the hearing device housing wall which are arranged close to or at the battery compartment are provided with a hydrophobic coating.
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP03029970.5A EP1432285B1 (en) | 2003-12-30 | 2003-12-30 | Hydrophobic coating of individual hearing aid components |
DK03029970.5T DK1432285T3 (en) | 2003-12-30 | 2003-12-30 | Hydrophobic coating of the individual components of the hearing instrument |
US10/749,291 US7267847B2 (en) | 2003-12-30 | 2003-12-30 | Hydrophobic coating of individual components of hearing aid devices |
CN 200410098341 CN1638531B (en) | 2003-12-30 | 2004-12-03 | Hydrophobic coating of individual hearing aid components |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP03029970.5A EP1432285B1 (en) | 2003-12-30 | 2003-12-30 | Hydrophobic coating of individual hearing aid components |
US10/749,291 US7267847B2 (en) | 2003-12-30 | 2003-12-30 | Hydrophobic coating of individual components of hearing aid devices |
Publications (3)
Publication Number | Publication Date |
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EP1432285A2 EP1432285A2 (en) | 2004-06-23 |
EP1432285A3 EP1432285A3 (en) | 2004-12-22 |
EP1432285B1 true EP1432285B1 (en) | 2016-06-08 |
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Application Number | Title | Priority Date | Filing Date |
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EP03029970.5A Expired - Lifetime EP1432285B1 (en) | 2003-12-30 | 2003-12-30 | Hydrophobic coating of individual hearing aid components |
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US (1) | US7267847B2 (en) |
EP (1) | EP1432285B1 (en) |
Families Citing this family (36)
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DE202004001229U1 (en) * | 2004-01-27 | 2005-06-16 | Systec Pos-Technology Gmbh | Device for reducing capillary forces |
DE102004023306B3 (en) * | 2004-05-11 | 2005-10-27 | Siemens Audiologische Technik Gmbh | Hearing aid with wax guard |
GB2438247B (en) * | 2006-05-11 | 2011-11-02 | Nokia Corp | Improvements in or relating to liquid sensitive electronic products |
CA2661144C (en) * | 2006-08-31 | 2013-08-06 | Widex A/S | Filter for a hearing aid and a hearing aid |
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2003
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- 2003-12-30 EP EP03029970.5A patent/EP1432285B1/en not_active Expired - Lifetime
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US7267847B2 (en) | 2007-09-11 |
EP1432285A2 (en) | 2004-06-23 |
EP1432285A3 (en) | 2004-12-22 |
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