EP1376624A1 - Elektrisches Bauelement mit Isolationszone - Google Patents
Elektrisches Bauelement mit Isolationszone Download PDFInfo
- Publication number
- EP1376624A1 EP1376624A1 EP03013864A EP03013864A EP1376624A1 EP 1376624 A1 EP1376624 A1 EP 1376624A1 EP 03013864 A EP03013864 A EP 03013864A EP 03013864 A EP03013864 A EP 03013864A EP 1376624 A1 EP1376624 A1 EP 1376624A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- contact layer
- electrode
- edge
- base body
- flat surface
- 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
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01C—RESISTORS
- H01C7/00—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material
- H01C7/10—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material voltage responsive, i.e. varistors
- H01C7/102—Varistor boundary, e.g. surface layers
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01C—RESISTORS
- H01C7/00—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material
- H01C7/10—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material voltage responsive, i.e. varistors
- H01C7/12—Overvoltage protection resistors
Definitions
- the invention relates to an electrical component with a Base body containing a ceramic material and in the on the flat surface of the body a contact layer is applied for electrical contact.
- the known components have the disadvantage that it at the metallization edge to an electrical peak effect, d. H. comes to a field peak, causing the dielectric strength and thus also the current carrying capacity of the varistor is significantly reduced. In the worst case it comes to Scattering and burning of the metallization edge and thus to the failure of the device.
- the one Base body containing a ceramic material.
- a contact layer applied to the electrical contacting of the Basic body serves.
- an electrode attached, with spacers in the form of spacer knobs is provided. The spacers serve to adjust a defined distance between the contact layer and the electrode.
- the electrical edge field is in a device according to the invention not just by the distance between the opposite ones Edge regions of the contact layers, but also by the distance between the opposite ones Defined edge regions of the electrodes.
- the electrical component has the advantage that by the in applied at a defined distance from the respective contact layer Electrode the electric field strength at the edge of this Contact layer can be influenced so that a field cant between the opposite edge regions the contact layers is reduced. This increases the dielectric strength of the device in an advantageous manner.
- the electrode can advantageously be parallel to the flat surface of the body over the edge protrude the contact layer, thus a particularly effective Shielding effect for at the edge of the contact layer To cause resulting electric fields.
- the contact layer in the direction parallel to flat surface of the body protrude below the electrode.
- the distance between the edge of the Electrode and the edge of the contact layer chosen so small be that the electrode still influence the field distribution can take on the edge of the contact layer.
- the electrode is up to the The edge of the flat surface of the base body is sufficient. Thereby a particularly good shielding effect of the electrode is achieved.
- the contact layer a free edge on Edge of the surface of the body leaves free.
- the Edge of the contact layer offset a bit inwards.
- the thickness of the electrode is at least twice as large like the thickness of the contact layer. This ensures that that the effect of field elevation at the edge of the electrode smaller than the contact layer.
- an electrical component is advantageous in which the base body has the shape of a disc on whose top and bottom each arranged a contact layer is.
- Each of these contact layers can with the inventive Be provided electrode. This will be one more further reduction of field elevation at the edges of the contact layers reached.
- the figure shows an example of an electrical component in a schematic cross section.
- the figure shows a disc-shaped varistor in schematic cross-section.
- the varistor has a main body 1, which is made of a varistor ceramic.
- the main body 1 has the shape of a disc, wherein the Top of the disc and the bottom of the disc respectively is covered with a contact layer 2, 2a.
- the contact layers 2, 2a are not enough to the edge of the top or the underside of the main body 1, but it remains at the edge of the contact layers 2, 2a a free edge 5, the electrical insulation between the contact layers 2, 2a improved. This improvement is due to the fact that with the free edge 5 an increased creepage distance from the contact layer 2 on the underside of the main body 1 to the contact layer 2a predetermined on the upper side of the base body 1 is.
- the isolation zone 6 is defined, the relevant Influence on the dielectric strength of the device Has.
- the main body 1 may, for example, have a diameter of 20 mm and contain as ceramic material a mixture of ZnO and Bi 2 O 3 . In addition, however, other ceramic materials are conceivable which have a varistor effect.
- the contact layers 2, 2 a may, for example, be baking layers that contain silver and from a silver stoving paste are produced by screen printing.
- the diameter the contact layers 2, 2a may be for example 16 mm. This results in the free edge 5 a width of 2 mm.
- the contact layers 2, 2 a can have a thickness d of 15 have ⁇ m.
- Each of the contact layers 2, 2 a bears on the base body 1 opposite side of an electrode 4, 4a, for example a tinned copper disc with a diameter of 19 mm can be.
- the thickness D of the electrode 4, 4a can z. B. be 0.5 mm.
- the electrodes 4, 4a are with spacer elements 7 provided, for example, a strength of 0.25 mm and which consequently a distance a between cause the electrode 4, 4a and the contact layer 2, 2a, which is 0.25 mm.
- the distance a between the contact layer 2 and the electrode 4 can advantageously between 0.1 and 0.5 mm.
- the spacers 7 can for example in the form of spacer studs in the tinned Be impressed copper plate.
- the electrodes 4, 4a are connected by means of an adhesive 3 to the Contact layers 2, 2a attached.
- This adhesive 3 can for example tin. But the adhesive 3 can also Be conductive adhesive.
- the compound of Electrodes 4, 4a to the contact layers 2, 2a by soldering.
- the electrodes 4, 4a not necessarily as shown in the figure Cover contact layers 2, 2a over the entire surface. It is crucial Rather, only an edge region of the electrode 4, 4a, therefore the electrodes are also designed in the form of rings can.
- the present invention is not limited to varistors, but is on all sorts of electrical components, which contain a basic body with ceramic material, for example NTC or PTC devices, applicable.
Landscapes
- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Thermistors And Varistors (AREA)
Abstract
Description
Die Figur zeigt einen scheibenförmigen Varistor im schematischen Querschnitt. Der Varistor weist einen Grundkörper 1 auf, welcher aus einer Varistorkeramik hergestellt ist.
- 1
- Grundkörper
- 2, 2a
- Kontaktschicht
- 3
- Haftmittel
- 4, 4a
- Elektrode
- 5
- Freirand
- 6
- Isolationszone
- 7
- Distanzelement
- d
- Dicke der Kontaktschicht
- D
- Dicke der Elektrode
- a
- Abstand
Claims (7)
- Elektrisches Bauelementmit einem Grundkörper (1), enthaltend ein Keramikmaterial,mit einer auf einer ebenen Oberfläche des Grundkörpers (1) aufgebrachten Kontaktschicht (2) zur elektrischen Kontaktierung,und mit einer auf der Kontaktschicht (2) befestigten Elektrode (4), die mit Distanzelementen (7) in Form von Abstandsnoppen versehen ist, die zur Einstellung eines definierten Abstands (a) zwischen der Kontaktschicht (2) und der Elektrode (4) dienen.
- Bauelement nach Anspruch 1,
bei dem die Elektrode (4) in Richtung parallel zur ebenen Oberfläche des Grundkörpers über den Rand der Kontaktschicht (2) hinausragt. - Bauelement nach Anspruch 1,
bei dem die Kontaktschicht (2) in Richtung parallel zur ebenen Oberfläche des Grundkörpers unter der Elektrode (4) hervorsteht. - Bauelement nach Anspruch 1,
bei dem der Rand der Elektrode (4) in Richtung parallel zur ebenen Oberfläche des Grundkörpers im wesentlichen über dem Rand der Kontaktschicht (2) liegt. - Bauelement nach einem der Ansprüche 1 bis 4,
bei dem die Elektrode (4) in Richtung parallel zur ebenen Oberfläche des Grundkörpers bis zum Rand der ebenen Oberfläche des Grundkörpers (1) reicht. - Bauelement nach einem der Ansprüche 1 bis 5,
bei dem die Dicke (D) der Elektrode (4) wenigstens zweimal so groß ist wie die Dicke (d) der Kontaktschicht (2). - Bauelement nach einem der Ansprüche 1 bis 6,
bei dem der Grundkörper (1) die Form einer Scheibe aufweist, auf deren Ober- und Unterseite jeweils eine Kontaktschicht (2, 2a) angeordnet ist.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10227563 | 2002-06-20 | ||
DE2002127563 DE10227563B4 (de) | 2002-06-20 | 2002-06-20 | Elektrisches Bauelement mit Isolationszone |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1376624A1 true EP1376624A1 (de) | 2004-01-02 |
EP1376624B1 EP1376624B1 (de) | 2007-10-17 |
Family
ID=29716568
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP20030013864 Expired - Lifetime EP1376624B1 (de) | 2002-06-20 | 2003-06-18 | Elektrisches Bauelement mit Isolationszone |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP1376624B1 (de) |
DE (2) | DE10227563B4 (de) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102019110374A1 (de) * | 2019-04-18 | 2020-10-22 | Tdk Electronics Ag | Bauelement |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1170046B (de) * | 1960-10-11 | 1964-05-14 | Licentia Gmbh | Aus spannungsabhaengigen Massewiderstands-scheiben bestehender Widerstandsstapel fuer den Betrieb im Isolier- und Kuehlmittel von Transformatoren |
US4317101A (en) * | 1980-10-27 | 1982-02-23 | General Electric Company | Stable high voltage DC varistor |
US4441094A (en) * | 1981-03-02 | 1984-04-03 | General Electric Company | Solderable largely base metal electrodes for metal oxide varistors |
EP0788152A2 (de) * | 1996-01-30 | 1997-08-06 | Kabushiki Kaisha Toshiba | Unter internem Druck zusammengesetzte Halbleiteranordnung mit einem Chip-Rahmen, der eine längere Kriechstrecke erlaubt |
DE19856939A1 (de) * | 1998-12-10 | 2000-06-15 | Bettermann Obo Gmbh & Co Kg | Schaltungsanordnung zum Schutz von elektrischen Installationen gegen Überspannungsereignisse |
WO2001006522A2 (de) * | 1999-07-19 | 2001-01-25 | Siemens Aktiengesellschaft | Überspannungsableiter |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4431983A (en) * | 1980-08-29 | 1984-02-14 | Sprague Electric Company | PTCR Package |
JPH01143203A (ja) * | 1987-11-27 | 1989-06-05 | Murata Mfg Co Ltd | 有機正特性サーミスタ |
DE19729184A1 (de) * | 1997-07-08 | 1999-02-04 | Siemens Matsushita Components | Elektrisches Bauelement, insbesondere Energievaristor |
-
2002
- 2002-06-20 DE DE2002127563 patent/DE10227563B4/de not_active Expired - Fee Related
-
2003
- 2003-06-18 DE DE50308391T patent/DE50308391D1/de not_active Expired - Lifetime
- 2003-06-18 EP EP20030013864 patent/EP1376624B1/de not_active Expired - Lifetime
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1170046B (de) * | 1960-10-11 | 1964-05-14 | Licentia Gmbh | Aus spannungsabhaengigen Massewiderstands-scheiben bestehender Widerstandsstapel fuer den Betrieb im Isolier- und Kuehlmittel von Transformatoren |
US4317101A (en) * | 1980-10-27 | 1982-02-23 | General Electric Company | Stable high voltage DC varistor |
US4441094A (en) * | 1981-03-02 | 1984-04-03 | General Electric Company | Solderable largely base metal electrodes for metal oxide varistors |
EP0788152A2 (de) * | 1996-01-30 | 1997-08-06 | Kabushiki Kaisha Toshiba | Unter internem Druck zusammengesetzte Halbleiteranordnung mit einem Chip-Rahmen, der eine längere Kriechstrecke erlaubt |
DE19856939A1 (de) * | 1998-12-10 | 2000-06-15 | Bettermann Obo Gmbh & Co Kg | Schaltungsanordnung zum Schutz von elektrischen Installationen gegen Überspannungsereignisse |
WO2001006522A2 (de) * | 1999-07-19 | 2001-01-25 | Siemens Aktiengesellschaft | Überspannungsableiter |
Also Published As
Publication number | Publication date |
---|---|
DE10227563B4 (de) | 2004-08-12 |
DE50308391D1 (de) | 2007-11-29 |
EP1376624B1 (de) | 2007-10-17 |
DE10227563A1 (de) | 2004-01-15 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP0103748B1 (de) | Kombinierte Schaltung mit Varistor | |
DE4105997C2 (de) | Laminatverschiebungseinrichtung | |
DE3525708A1 (de) | Ozonisierungsvorrichtung | |
EP0958620A1 (de) | Piezoaktor mit neuartiger kontaktierung und herstellverfahren | |
DE2050289B2 (de) | Steuerbarer Halbleitergleichrichter | |
DE102006015723A1 (de) | Mehrschichtiger Chipvaristor | |
WO1983001708A1 (en) | Thin or thick layer technic voltage divider | |
DE3638286A1 (de) | Elektrisches bauelement aus keramik mit mehrlagenmetallisierung und verfahren zu seiner herstellung | |
EP1387392B1 (de) | Elektrostatischer Greifer | |
DE1914442B2 (de) | Halbleiteranordnung | |
DE2929547C2 (de) | Mikrowellen-Dämpfungsglied | |
DE1614858C3 (de) | Halbleiteranordnung | |
DE3606690A1 (de) | Netzwerk-widerstandseinheit | |
DE69126976T2 (de) | Verfahren zur Herstellung eines Niederspannungsvaristorfelds | |
EP1376624B1 (de) | Elektrisches Bauelement mit Isolationszone | |
DE3206869C2 (de) | Metalloxid-Varistor und Verfahren zu seiner Herstellung | |
DE2508140C3 (de) | Überspannungsableiter | |
DE102005046118A1 (de) | Piezoaktor mit Schutzwiderstand | |
DE102004039853A1 (de) | Elektrische Baueinheit und Verfahren zum Herstellen einer solchen Baueinheit | |
DE10235011A1 (de) | Elektrisches Vielschichtbauelement | |
DE112020005494T5 (de) | Varistor | |
DE3702780A1 (de) | Integrierte Varistor-Schutzvorrichtung zum Schutz eines Elektronikbauteils gegen die Wirkungen von elektromagnetischen Feldern oder statischen Ladungen | |
DE3637988A1 (de) | Anzuendbauteil | |
DE3004736A1 (de) | Nicht-lineare widerstandselemente und verfahren zu deren herstellung | |
CH695406A5 (de) | Gategleichgerichtetes Turn-Off Thyristormodul. |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT RO SE SI SK TR |
|
AX | Request for extension of the european patent |
Extension state: AL LT LV MK |
|
17P | Request for examination filed |
Effective date: 20040702 |
|
AKX | Designation fees paid |
Designated state(s): DE FR GB |
|
GRAP | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOSNIGR1 |
|
GRAS | Grant fee paid |
Free format text: ORIGINAL CODE: EPIDOSNIGR3 |
|
GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): DE FR GB |
|
REG | Reference to a national code |
Ref country code: GB Ref legal event code: FG4D Free format text: NOT ENGLISH |
|
REF | Corresponds to: |
Ref document number: 50308391 Country of ref document: DE Date of ref document: 20071129 Kind code of ref document: P |
|
GBT | Gb: translation of ep patent filed (gb section 77(6)(a)/1977) |
Effective date: 20080116 |
|
ET | Fr: translation filed | ||
PLBE | No opposition filed within time limit |
Free format text: ORIGINAL CODE: 0009261 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT |
|
26N | No opposition filed |
Effective date: 20080718 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: FR Payment date: 20080617 Year of fee payment: 6 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: GB Payment date: 20080627 Year of fee payment: 6 |
|
GBPC | Gb: european patent ceased through non-payment of renewal fee |
Effective date: 20090618 |
|
REG | Reference to a national code |
Ref country code: FR Ref legal event code: ST Effective date: 20100226 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: FR Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20090630 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: GB Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20090618 |
|
REG | Reference to a national code |
Ref country code: DE Ref legal event code: R082 Ref document number: 50308391 Country of ref document: DE Representative=s name: EPPING HERMANN FISCHER PATENTANWALTSGESELLSCHA, DE Ref country code: DE Ref legal event code: R081 Ref document number: 50308391 Country of ref document: DE Owner name: TDK ELECTRONICS AG, DE Free format text: FORMER OWNER: EPCOS AG, 81669 MUENCHEN, DE |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: DE Payment date: 20220622 Year of fee payment: 20 |
|
REG | Reference to a national code |
Ref country code: DE Ref legal event code: R071 Ref document number: 50308391 Country of ref document: DE |
|
P01 | Opt-out of the competence of the unified patent court (upc) registered |
Effective date: 20230521 |