BE341575A - - Google Patents

Info

Publication number
BE341575A
BE341575A BE341575DA BE341575A BE 341575 A BE341575 A BE 341575A BE 341575D A BE341575D A BE 341575DA BE 341575 A BE341575 A BE 341575A
Authority
BE
Belgium
Prior art keywords
construction
plates
metal
insulating
application
Prior art date
Application number
Other languages
French (fr)
Publication of BE341575A publication Critical patent/BE341575A/fr

Links

Classifications

    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05KPRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K9/00Screening of apparatus or components against electric or magnetic fields
    • H05K9/0073Shielding materials
    • H05K9/0075Magnetic shielding materials

Landscapes

  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Laminated Bodies (AREA)

Description

       

   <Desc/Clms Page number 1> 
 



   Plaques   isolantes   métalli sées   "   
On connaît depuis quelque temps l'intérêt qu'il y a au point de vue de l'amélioration de leur rendement, à   faradser   les postes récepteurs de télégraphie sans fil   ,c'est  dire à soustraire leurs circuits a des actions mutuelles et des influences nuisibles de courants   à   haute fréquence en les disposant dans des montures métalliques ou dans des   boîtes   métalliques. 



    Toutefois,la   manière actuelle de procéder présente l'inconvénient que le travail direct du métal est assez difficile à réaliser et que lorsque l'on utilise simplement des feuilles métalliques de revêtement ,l'on doit à la fois travailler les supports isolants et les revêtements métalliques ce qui complique considérablement la construction. 



   L'invention consiste à réaliser directement des plaques isolandes recouvertes d'une couche métallique,par un procédé de métal- 

 <Desc/Clms Page number 2> 

 
 EMI2.1 
 lisation. ette manière de/procéder sera décrite ci-dessous plus en détail en indiquant un exemple non limitatif,mais destiné uniquement à faciliter la compréhension de l'invention. 



   Supposons un poste récepteur de radio téléphonie et télé- graphie; les différents éléments qui le composent, et notamment les condensateurs,les bobines de self   induction,les   commutateur rhéostats,bornes de connexion,etc. seront montés sur des pla- ques isolantes recouvertes par métallisation d'une couche mé- tallique qui formera, après montage du poste, des enveloppes complètes soustrayant   complètement   les organes du poste aux influences nuisibles d'induction mutuelle par courants à haute fréquence.

   La matière des plaques isolantes pourra être généralement quelconque et plus particulièrement celle géné- ralement utilisée dans la construction de tels   appareils,c'est   à dire le bois,le carton   fort.l'ébonite.la   bakélite, la gomme- laque,etc.Ces matières , en plaques ou en feuilles,sont re - couvertes au moyen d'un procédé de métallisation par projection quelconque,notamment par projectionl'air comprimé et au chalumeau, genre Schoop,etc. d'une pellicule métallique d'une certaine épaisseur,qui se présente sous un aspect légèrement granuleux immédiatement après la métallisation,mais qui est sus- ceptible de recevoir un polissage de très bel aspect.

   Il a été vérifié que la   euille     métallique/ainsi   obtenue est remarquable- ment adhérente à son   support.four   le passage des boulons,tiges de connexion,fils conducteurs etc. qui doivent traverser les plaques métallisées tout en restant isolés,il suffit avant de   forear   le trou de passage de ces éléments,d'enlever la pellicule métallique autour de ce trou au moyen d'une petite fraise ou d'un autil quelconque approprié.

   On peut également utiliser le procédé ci-dessus décrit à la fabrication des petits condensa- teurs fixes utilisés dans les postes récepteurs et ce en   métal-   lisant sur une ou sur leurs deux faces,des feuilles isolantes 

 <Desc/Clms Page number 3> 

 quelconques qu'il peut alors suffire de débiter pa,r simple dé- coupage   à   dimension en éléments comprenant soit l'une soit les deux armatures d'un condensateur et qui peuvent être empi- lées aisément pour constituer des condensateurs de capacité plus élevée. Un tel mode de construction des petits condensateurs fixes permettrait d'économiser la préparation séparée des feuil- les isolantes et des armatures et en même temps assurerait une beaucoup plus grande sécurité et facilité dans le montage. 



   Il doit d'ailleurs être bien entendu que les exemples donnés ci-dessus n'ont qu'une valeur purement explicative et que l'in- vention porte d'une manière générale sur l'application des pro- oédés de métallisation actuellement connus au revêtement des feuilles ou plaques de matière isolante,plus particulièrement en vue de leur utilisation dans la construction des postes de   T.S.F.   faradisés et d'éléments de tels postes ainsi que sur le produit industriel nouveau obtenu consistant dans ces pla- ques isolantes recouvertes d'une fauille métallique. 



    REVENDICATIONS.   



   1. Des plaques en matière isolante,bois,carton,bakélite, ébonitè,etc.recouvertes au moyen d'un procédé de métallisation, par projection,d'une pellicule métallique fortement adhérente et suseep=tible de subir un travail de polissage.



   <Desc / Clms Page number 1>
 



   Metallized insulating plates "
It has been known for some time the interest which there is from the point of view of the improvement of their output, in faradser the receiving stations of wireless telegraphy, that is to say in withdrawing their circuits from mutual actions and influences. harmful high frequency currents by arranging them in metal frames or in metal boxes.



    However, the current way of proceeding has the drawback that the direct working of the metal is quite difficult to achieve and that when one simply uses metal sheets of coating, one has to work at the same time the insulating supports and the coatings. metal which considerably complicates the construction.



   The invention consists in directly producing insulating plates covered with a metal layer, by a metal process.

 <Desc / Clms Page number 2>

 
 EMI2.1
 lization. andthis way of proceeding will be described below in more detail by indicating a non-limiting example, but intended only to facilitate understanding of the invention.



   Let us assume a radio telephony and telegraphy receiver; the various elements which compose it, and in particular the capacitors, the induction choke coils, the rheostats switches, connection terminals, etc. will be mounted on insulating plates covered by metallization with a metal layer which will form, after assembly of the station, complete envelopes completely shielding the components of the station from the harmful influences of mutual induction by high frequency currents.

   The material of the insulating plates can generally be any and more particularly that generally used in the construction of such apparatus, ie wood, strong cardboard, ebonite, bakelite, shellac, etc. These materials, in plates or sheets, are covered by means of any metallization process by any spraying, in particular by spraying with compressed air and with a torch, such as Schoop, etc. a metallic film of a certain thickness, which presents itself in a slightly granular appearance immediately after the metallization, but which is liable to receive a very fine polishing appearance.

   It has been verified that the metal sheet / thus obtained is remarkably adherent to its support, for the passage of bolts, connecting rods, conducting wires etc. which must pass through the metallized plates while remaining isolated, it suffices before drilling the passage hole of these elements, to remove the metal film around this hole by means of a small cutter or any suitable autil.

   The process described above can also be used for the manufacture of small fixed capacitors used in receiving stations and this by metalizing on one or both sides of the insulating sheets.

 <Desc / Clms Page number 3>

 any that may then suffice to debit by simple cut-to-size into elements comprising either one or both plates of a capacitor and which can be easily stacked to form capacitors of higher capacity. Such a method of constructing the small fixed capacitors would make it possible to save the separate preparation of the insulating sheets and the reinforcements and at the same time would ensure much greater safety and ease in assembly.



   It must also be understood that the examples given above have only a purely explanatory value and that the invention relates generally to the application of the metallization methods currently known to the field. coating of sheets or plates with insulating material, more particularly with a view to their use in the construction of TSF stations faradized and elements of such stations as well as on the new industrial product obtained consisting of these insulating plates covered with a metal foil.



    CLAIMS.



   1. Plates of insulating material, wood, cardboard, bakelite, ebonite, etc., covered by means of a metallization process, by projection, with a strongly adherent metal film which is susceptible to undergoing polishing work.


    

Claims (1)

2. L'application des procédés de métallisation à la fabri- cation de plaques isolantes revêtues d'une feuille métallique suivant revendication l,notamment en vue de l'application des dites plaques dans la construction de postes de T.S.F. faradi- sés ou d'autres appareillages électriques de même fonction. 2. The application of metallization processes to the manufacture of insulating plates coated with a metal foil according to claim 1, in particular with a view to the application of said plates in the construction of T.S.F. stations. flour or other electrical equipment with the same function. 3. L'application des feuilles isolantes métallisées à la construction des condensateurs fixes utilisés dans la construc- tion du matériel téléphonique et radio-téléphonique. 3. The application of metallized insulating sheets to the construction of fixed capacitors used in the construction of telephone and radio-telephone equipment.
BE341575D BE341575A (en)

Publications (1)

Publication Number Publication Date
BE341575A true BE341575A (en)

Family

ID=18184

Family Applications (1)

Application Number Title Priority Date Filing Date
BE341575D BE341575A (en)

Country Status (1)

Country Link
BE (1) BE341575A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0359893A1 (en) * 1986-02-17 1990-03-28 Franz Andrae Device for shielding against electromagnetic fields

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0359893A1 (en) * 1986-02-17 1990-03-28 Franz Andrae Device for shielding against electromagnetic fields

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