EP0785563B1 - Procédé pour fixer un premier élément en métal ou céramique à un deuxième élément en métal ou céramique - Google Patents

Procédé pour fixer un premier élément en métal ou céramique à un deuxième élément en métal ou céramique Download PDF

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Publication number
EP0785563B1
EP0785563B1 EP96120725A EP96120725A EP0785563B1 EP 0785563 B1 EP0785563 B1 EP 0785563B1 EP 96120725 A EP96120725 A EP 96120725A EP 96120725 A EP96120725 A EP 96120725A EP 0785563 B1 EP0785563 B1 EP 0785563B1
Authority
EP
European Patent Office
Prior art keywords
composition
ceramic
fusible conductor
fuse
ceramic member
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.)
Expired - Lifetime
Application number
EP96120725A
Other languages
German (de)
English (en)
Other versions
EP0785563A1 (fr
Inventor
Bernd Dr.-Ing. Fröchte
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.)
Wickmann Werke GmbH
Original Assignee
Wickmann Werke 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 Wickmann Werke GmbH filed Critical Wickmann Werke GmbH
Publication of EP0785563A1 publication Critical patent/EP0785563A1/fr
Application granted granted Critical
Publication of EP0785563B1 publication Critical patent/EP0785563B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H85/00—Protective devices in which the current flows through a part of fusible material and this current is interrupted by displacement of the fusible material when this current becomes excessive
    • H01H85/02—Details
    • H01H85/04—Fuses, i.e. expendable parts of the protective device, e.g. cartridges
    • H01H85/041—Fuses, i.e. expendable parts of the protective device, e.g. cartridges characterised by the type
    • H01H85/0411—Miniature fuses
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H85/00—Protective devices in which the current flows through a part of fusible material and this current is interrupted by displacement of the fusible material when this current becomes excessive
    • H01H85/02—Details
    • H01H85/04—Fuses, i.e. expendable parts of the protective device, e.g. cartridges
    • H01H85/05—Component parts thereof
    • H01H85/143—Electrical contacts; Fastening fusible members to such contacts
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H69/00—Apparatus or processes for the manufacture of emergency protective devices
    • H01H69/02—Manufacture of fuses
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H85/00—Protective devices in which the current flows through a part of fusible material and this current is interrupted by displacement of the fusible material when this current becomes excessive
    • H01H85/02—Details
    • H01H85/04—Fuses, i.e. expendable parts of the protective device, e.g. cartridges
    • H01H85/041—Fuses, i.e. expendable parts of the protective device, e.g. cartridges characterised by the type
    • H01H85/0411—Miniature fuses
    • H01H85/0415—Miniature fuses cartridge type
    • H01H85/0418—Miniature fuses cartridge type with ferrule type end contacts
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H85/00—Protective devices in which the current flows through a part of fusible material and this current is interrupted by displacement of the fusible material when this current becomes excessive
    • H01H85/02—Details
    • H01H85/04—Fuses, i.e. expendable parts of the protective device, e.g. cartridges
    • H01H85/05—Component parts thereof
    • H01H85/143—Electrical contacts; Fastening fusible members to such contacts
    • H01H85/157—Ferrule-end contacts
    • 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
    • Y10T29/49107—Fuse making

Definitions

  • the invention relates to a method for the production of an electrical fuse fixing a surface of a ceramic part on a fuse fuse, and a fuse with a ceramic first part and a second part, the an electrically conductive wire, namely the fuse element of the Fuse is.
  • ceramic material in the sense of the invention all ceramics as well as metal and glass ceramics and also glasses to understand.
  • Fastenings of this type play a part in the manufacture electrical fuses using the so-called Thick film technology plays a major role.
  • Thick film technology With thick film technology are complete circuits on a ceramic Substrate created. This is done on a ceramic substrate electrical contacts, conductor tracks and resistance layers applied and also prefabricated components or assemblies integrated into the circuit as SMD elements. For this the necessary contact points, conductor tracks and resistors as powdery layers of metal-containing mixtures applied to the surface of the ceramic. That can also in the Pastes are made that have the same mixture of materials as Wear emulsion.
  • the permanent attachment of the very fine-grained Materials are made by baking.
  • the branding or American "firing" means a process in which all components of the applied fine-grained mass with each other get connected.
  • a fuse is a fuse element in air or protective gas cheaper.
  • a first one as a carrier provided securing substrate and a second as a cover cap serving substrate in the form of two ceramic parts Burning in a paste for making electrical contacts metallized at opposite ends. A wire becomes fixed as a fuse between the two contacts. This Arrangement is permanently connected by gluing. A safe one electrical connection of the contacts to each other and to the Fusible conductor takes place in a final work step by soldering.
  • the fastening method proposed according to the invention for Manufacture of electrical fuses involves a sintering step.
  • sintering is a heat treatment described in which a powdery material mixture is not is completely melted, but only at the grain boundaries of the material mixture by diffusion and alloying connections arise.
  • the resulting connection is mechanical safe and permanent and can accordingly. for fixing of a ceramic part on a fuse element of a fuse.
  • she Depending on the composition of the mixture, it is also thermal resilient, higher than a variety of adhesives that commonly used to make such connections become.
  • the used Parts can be tubular as well as any area his.
  • ceramic materials Use in the field of electrical device fuses e.g. in the form of small pipes and flat ceramic plates with flat surface and central trough-like depression in the largest of their rectangular surface pieces.
  • the electrical conductor can also pass through before the sintering process another ceramic part to be covered.
  • This ceramic part only needs to be above the fusible conductor from a ground contact extend to the other and with these on the surfaces contact. So in a sintering process, namely through a single process step, substrate, Melting conductor and covering ceramic at the same time mechanically be firmly and electrically connected together.
  • this arrangement has the ceramic substrate between those with sinterable Mass occupied areas on a trough-like depression.
  • the covering ceramic has between those with the sinterable Earth later contacting places also one trough-like depression. So the fuse element is already at Assembly only over the two mass layers of that Substrate, and only in these places is it from the touches ceramic cover.
  • the Fusible conductor at the end of the sintering process over the two new resulting electrical contact points on both sides is mechanically connected to the carrier as with the cover and is kept self-supporting. Accordingly, the fuse element only one gas layer between its connection points surrounded with great insulation and can receive the desired switching characteristics.
  • the ceramic carrier the shape of a tube, which is connected to the sinterable mass is occupied.
  • the fuse element is through an opening is inserted and runs from the inside of the pipe Front side to the next self-supporting and only surrounded by gas.
  • the sintering process takes on the task of mechanical Attachment like the electrical contact of the Fuse element.
  • the pipe openings of this embodiment can before Sintering closed on both sides by electrically conductive caps and mechanically solid and electrical in the same sintering step conductive with the tube and with the fuse element get connected. Similar measures are also with others Embodiments conceivable.
  • the combination of materials is essential for the process in the sintered mass with regard to those to be joined Parts.
  • the mass must have metallic components for the conductive and have mechanical connection with the fuse element.
  • the components must be securely attached Mass on the surface of the ceramic of the other parts in the course enable the sintering process. So that can be used Mass to the family of "cermets", the so-called metal ceramics belong.
  • this procedure is contrary to typical cermet process the powder directly, or advantageously used in the form of a paste, and not under pressed to a blank under high pressure.
  • As a possible combination be the attachment of a silver wire to one Ceramic substrate using a sintered mass of silver, Called platinum and palladium.
  • Fig. 1 the basic attachment of the grains is one Sintered mass from a silver-palladium-platinum mass to one Silver wire shown.
  • the individual grains collide with theirs Edges and surfaces together. Sometimes they touch the surface of the silver wire. Through the sintering process there is no complete melting of those involved powdery materials, but only one Material transport between the granules, so that they attach themselves connect the contact points. Find it too Diffusion processes take place. The granules therefore lose theirs Shape not. As a result, you keep a solid and porous Mass that is well conductive and with its components the surface of the silver wire is conductively connected. In order to is a mechanically stable and electrically conductive on the wire Contact has been made.
  • Fig. 2 shows an electrical fuse.
  • sinterable mass 2 is applied on both sides Service.
  • On the ceramic top is between the mass-coated Ends of the carrier of the fuse element 3 have been placed.
  • the fuse element 3 between the contact points 4 covered by a sealing compound 5.
  • This manufacturing method for easy securing advantageously just four more steps: applying the sintered mass, Inserting the fuse element, sintering and casting.
  • the Work steps are metallizing, fixing and soldering omitted.
  • FIG. 3 shows a particularly favorable design of an SMD fuse with a fuse element 3 in a chamber.
  • ceramic substrate 1 and the cap 1 by the same shape symmetrical ceramic parts formed. With these ceramic parts only have to use the narrow side of the wider side for positioning the fuse element 3 can be distinguished over the trough 6. They are fully automatic Manufacturing no further parameters to be considered. Both parts are made on two sides with sinterable mass 2 coated and then with the between them in the Ground layer held fuse element 3 a sintering process subjected. This backup is advantageously none Post-treatment is necessary in a final step. So this process consists of only three steps. The The fuse is closed and the fuse element 3 is over the now sintered and electrically conductive contact points 4 electrically accessible.
  • this fuse does not have a fixed one Upper or lower part more. You can accordingly simply through placement machines in thick-film circuits integrated or soldered as an SMD component in printed circuits become. The production costs at Manufacturing as well as the cost of using this type of fuse significantly reduced.
  • Fig. 4 shows a basic design of a tube fuse with a ceramic, tubular support 7 attached to its End faces is covered with sinterable mass 2.
  • the fusible conductor 3 runs from the inside of the tube Face to face. It is on each face Fusible conductor 3 in contact with the sinterable mass 2. This makes it electrically like in a sintering step mechanically connected to the contact points 4, while the Mass 2 with the surface of the ceramic carrier 7 solid is connected.
  • FIG. 5 represents a supplement to the tube fuse according to FIG. 4
  • the end faces of the tube 7 by metal caps 8 have been closed before the sintering process. Only from The metal caps are for the sake of clarity 8 has been shown in FIG. 5 with a large excess.
  • Assembled fuse reliably with each other electrically also mechanically connected.

Landscapes

  • Fuses (AREA)
  • Ceramic Products (AREA)
  • Apparatuses And Processes For Manufacturing Resistors (AREA)

Claims (16)

  1. Procédé de fabrication d'un fusible avec fixation d'une surface d'un élément céramique à un élément fusible du fusible, dans lequel
    on applique sur au moins une partie de la surface de l'élément céramique et/ou une partie de la surface de l'élément fusible une matière qui peut être fixée par frittage aux surfaces à joindre entre elles de l'élément céramique et de l'élément fusible et devient conductrice par frittage,
    on met l'élément céramique et l'élément fusible en contact entre eux de façon telle que la matière saisisse entièrement ou partiellement, comme couche intermédiaire, les deux surfaces, et
    en un traitement thermique en une seule étape approprié au frittage, on joint solidement la matière aux parties précitées des surfaces de l'élément céramique et de l'élément fusible,
    l'élément céramique étant alors enveloppé au moins partiellement par la matière dans la zone de deux côtés opposés, et la matière se trouvant en contact sur les deux côtés avec l'élément fusible.
  2. Procédé selon la revendication 1, caractérisé par le fait qu'on utilise un élément céramique plat.
  3. Procédé selon la revendication 2, caractérisé par le fait que l'élément céramique plat présente un creux dans au moins une de ses faces.
  4. Procédé selon l'une des revendications 1 à 3, caractérisé par le fait qu'on couvre l'élément céramique au moins dans la zone de l'élément fusible.
  5. Procédé selon la revendication 4, caractérisé par le fait qu'on couvre l'élément fusible avec un composé d'empotage isolant.
  6. Procédé selon la revendication 5, caractérisé par le fait qu'on couvre l'élément céramique plat et l'élément fusible, entre les endroits de contact garnis de matière, avec un autre élément en céramique pouvant être garni de matière, de façon telle que la couche de matière vienne en contact sur les deux côtés de l'élément céramique avec les surfaces correspondantes de l'élément couvrant.
  7. Procédé selon la revendication 6, caractérisé par le fait que l'élément céramique et l'autre élément céramique sont garnis de matière et plats frontalement et présentent chacun un creux au milieu, de sorte qu'à la fin de l'opération de frittage, l'élément fusible s'étendant entre l'élément céramique et l'autre élément céramique est tenu non soutenu entre les revêtements de matière et joint de manière conductrice à la couche intermédiaire de matière sur les deux côtés.
  8. Procédé selon l'une des revendications 1 à 5, caractérisé par le fait qu'on utilise comme élément céramique un petit tube ayant de la matière frittable dans la zone de ses côtés frontaux et dans l'ouverture duquel l'élément fusible passe en allant d'un côté frontal à l'autre.
  9. Procédé selon l'une des revendications 6 à 8, caractérisé par le fait qu'on place une couverture sur chaque côté ayant de la matière et la fixe par frittage.
  10. Fusible comportant un premier élément céramique (1) et un deuxième élément (3) qui est un fil conducteur, c'est-à-dire l'élément fusible du fusible, caractérisé par le fait que
    le premier élément céramique (1)
    est enveloppé au moins partiellement dans la zone de chacun de deux côtés opposés
    d'une matière frittée et conductrice (2),
    cette matière se trouvant sur les deux côtés en contact avec
    le deuxième élément (3), qui est conducteur au moins à sa surface,
    et la matière (2) et les deux éléments (1; 3) étant joints solidement seulement par un traitement thermique approprié au frittage.
  11. Fusible selon la revendication 10, caractérisé par le fait que
    le premier élément céramique (1) est plat, de préférence avec un creux (6) dans la partie centrale d'au moins une de ses faces,
    et l'élément fusible est couvert au moins dans la zone entre les endroits de contact de la céramique garnis de matière.
  12. Fusible selon la revendication 10, caractérisé par le fait qu'un composé d'empotage isolant (5) couvre l'élément fusible (3).
  13. Fusible selon la revendication 10 comportant trois éléments joints, caractérisé par le fait que
    l'élément fusible (3) est tenu entre les revêtements de matière entre deux éléments céramiques (1) enveloppés au moins en partie par la matière (2) de manière identique dans la zone de deux côtés opposés et joint de manière conductrice.
  14. Fusible selon la revendication 13, caractérisé par le fait que
    les deux éléments céramiques (1) sont plats et présentent chacun un creux dans la partie centrale d'au moins une face,
    les creux (6) des éléments céramiques sont dirigés l'un vers l'autre de façon telle que
    le troisième élément, un élément fusible (3),
    soit tenu non soutenu entre les revêtements de matière (2).
  15. Fusible selon la revendication 10, caractérisé par le fait que
    l'élément fusible (3) passe par l'ouverture d'un petit tube céramique (7) en allant d'un côté frontal à l'autre de celui-ci,
    qui est pourvu à ses orifices de matière frittée et conductrice (2),
    et l'élément fusible (3) est joint de manière conductrice aux côtés frontaux.
  16. Fusible selon la revendication 15, caractérisé par le fait que sur chaque côté ayant de la matière du petit tube (5) est placée une couverture, par exemple un capuchon conducteur (8), qui est fixé par frittage.
EP96120725A 1996-01-18 1996-12-21 Procédé pour fixer un premier élément en métal ou céramique à un deuxième élément en métal ou céramique Expired - Lifetime EP0785563B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19601612 1996-01-18
DE19601612A DE19601612A1 (de) 1996-01-18 1996-01-18 Verfahren zum Befestigen eines ersten Teils aus Metall oder Keramik an einem zweiten Teil aus Metall oder Keramik

Publications (2)

Publication Number Publication Date
EP0785563A1 EP0785563A1 (fr) 1997-07-23
EP0785563B1 true EP0785563B1 (fr) 2002-11-27

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP96120725A Expired - Lifetime EP0785563B1 (fr) 1996-01-18 1996-12-21 Procédé pour fixer un premier élément en métal ou céramique à un deuxième élément en métal ou céramique

Country Status (4)

Country Link
US (1) US5926084A (fr)
EP (1) EP0785563B1 (fr)
AT (1) ATE228717T1 (fr)
DE (2) DE19601612A1 (fr)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19704097A1 (de) * 1997-02-04 1998-08-06 Wickmann Werke Gmbh Elektrisches Sicherungselement
DE10019121A1 (de) * 2000-04-18 2001-10-25 Moeller Gmbh Elektrischer Schaltkontakt und Verfahren zu dessen Herstellung
DE10056590A1 (de) * 2000-11-15 2002-05-23 Philips Corp Intellectual Pty Schaltungsanordnung
JP4155825B2 (ja) * 2001-03-02 2008-09-24 ビックマン−ベルケ ゲーエムベーハー ヒューズエレメントの製造方法
CN101401181B (zh) * 2006-03-16 2011-06-15 松下电器产业株式会社 表面安装型电流熔断器
US8154376B2 (en) * 2007-09-17 2012-04-10 Littelfuse, Inc. Fuses with slotted fuse bodies
US8081057B2 (en) * 2009-05-14 2011-12-20 Hung-Chih Chiu Current protection device and the method for forming the same
JP6007010B2 (ja) * 2012-07-18 2016-10-12 矢崎総業株式会社 電線ヒューズ及びその製造方法
US10276338B2 (en) 2016-06-01 2019-04-30 Littelfuse, Inc. Hollow fuse body with trench
US10325744B2 (en) * 2016-06-01 2019-06-18 Littelfuse, Inc. Hollow fuse body with notched ends

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1019242B (de) * 1955-06-18 1957-11-07 Steatit Magnesia Ag Verfahren zum Herstellen einer festen Verbindung zwischen keramischen Koerpern
FR2550001B1 (fr) * 1983-07-29 1986-05-16 Eurofarad Procede de fabrication d'un composant electronique par association de cellules elementaires, notamment de condensateurs ceramiques multicouches
US4612529A (en) * 1985-03-25 1986-09-16 Cooper Industries, Inc. Subminiature fuse
US4924203A (en) * 1987-03-24 1990-05-08 Cooper Industries, Inc. Wire bonded microfuse and method of making
JPH02288038A (ja) * 1989-04-27 1990-11-28 Murata Mfg Co Ltd ヒューズ及びその製造方法
DE9407550U1 (de) * 1993-04-21 1994-09-01 Wickmann-Werke GmbH, 58453 Witten Elektrische Sicherung
DE9410437U1 (de) * 1993-09-10 1994-08-18 Wickmann-Werke GmbH, 58453 Witten Schmelzsicherung
US5363082A (en) * 1993-10-27 1994-11-08 Rapid Development Services, Inc. Flip chip microfuse

Also Published As

Publication number Publication date
DE59609918D1 (de) 2003-01-09
US5926084A (en) 1999-07-20
EP0785563A1 (fr) 1997-07-23
ATE228717T1 (de) 2002-12-15
DE19601612A1 (de) 1997-07-24

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