EP0123457A1 - Connecteur à filtre incorporé - Google Patents

Connecteur à filtre incorporé Download PDF

Info

Publication number
EP0123457A1
EP0123457A1 EP84302143A EP84302143A EP0123457A1 EP 0123457 A1 EP0123457 A1 EP 0123457A1 EP 84302143 A EP84302143 A EP 84302143A EP 84302143 A EP84302143 A EP 84302143A EP 0123457 A1 EP0123457 A1 EP 0123457A1
Authority
EP
European Patent Office
Prior art keywords
layer
substrate
filter
connector according
filter element
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
Application number
EP84302143A
Other languages
German (de)
English (en)
Other versions
EP0123457B1 (fr
Inventor
Thomas Douglas Linnell
Arthur Thomas Murphy
Frederick John Young
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.)
EIDP Inc
Original Assignee
EI Du Pont de Nemours and Co
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=23908554&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0123457(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by EI Du Pont de Nemours and Co filed Critical EI Du Pont de Nemours and Co
Priority to AT84302143T priority Critical patent/ATE31372T1/de
Publication of EP0123457A1 publication Critical patent/EP0123457A1/fr
Application granted granted Critical
Publication of EP0123457B1 publication Critical patent/EP0123457B1/fr
Expired legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/66—Structural association with built-in electrical component
    • H01R13/719—Structural association with built-in electrical component specially adapted for high frequency, e.g. with filters
    • H01R13/7195—Structural association with built-in electrical component specially adapted for high frequency, e.g. with filters with planar filters with openings for contacts

Definitions

  • This invention relates to a filter connector for reducing electromagnetic interference in electrical devices. More particularly, it refers to a filter connector having a series of thick film capacitors with holes within the various elements of the capacitors, each accommodating an electrically conductive pin and attenuating various frequencies applied to the pin.
  • Filter connectors for attenuating high frequency interference from electrical devices are well known from several patents; e.g., U.S. Patent 3,538,464, U.S. 4,126,840, U.S. 4,144,509 and U.S. 4,187,481.
  • a capacitor employed with the filter is a series of ceramic layers forming a monolithic structure.
  • Thick film capacitors are also well known from U.S. Patent 4,274,124.
  • monolithic capacitors are currently used in filter connectors, it has not been practical heretofore to substitute thick film capacitors such as shown in U.S. 4,274,124 for these monolithic capacitors. Problems have occurred in designing a thick film capacitor for a filter connector which has a low enough inductance to attenuate high frequencies.
  • a useful commercial filter attenuates the electromagnetic signal at least 30 decibels (dB) at a 1000 megahertz (MHz) frequency.
  • This invention is a cost effective electrical filter connector for filtering a wide band -of frequencies up to 1000 MHz using a particular design of thick film capacitor in repeating sequence to form the filter element.
  • the filter element comprises a multiplicity of closely spaced thick film capacitors, each one having a conductive pin mounted in a hole through a capacitor.
  • the capacitor has multiple layers of screen printed materials over an alumina substrate having two horizontal surfaces and which is generally rectangular in shape. One layer is a metallization forming a ground electrode. This electrode is grounded to the connector housing. It substantially covers an entire horizontal surface of the alumina substrate and has holes sufficient in size to accommodate the conductive pins but without touching any of the pins.
  • Another layer is a metallization forming a pin electrode, but its area is limited to a portion around a given hole in the substrate.
  • This layer is in electrical contact with the pin through a solder joint.
  • a layer, dielectric in nature applied directly over one of the electrodes. This layer substantially overlaps a horizontal surface of the ground electrode when it is the first layer but allows the two longest edges on each side of the ground electrode to remain exposed.
  • This layer also has holes barely sufficient to allow conductive pins to pass through without touching the dielectric material.
  • the dielectric material also covers the vertical surface of the ground electrode which is nearest each hole.
  • a fourth and last layer is a nonconductive encapsulant for excluding moisture covering all layers except electrical contacting or soldering areas.
  • This filter connector maintains a substantial attenuation in the ultra high frequency range up to at least 1000 MHz.
  • filter connector 8 comprises a housing 10 having a top shell 12 and a bottom shell 14. Housing 10 encloses two rows of pins 18 mounted on a filter member 16. The interior of connector 8 is protected by a top insulator 20 and a bottom insulator 38. Pins 18 are individually mounted on filter element 16 by solder joints 22.
  • Threaded insert 28 can be included in the connector optionally to provide a mounting fixture to a cabinet.
  • Ground contacts 32 are made available on the top shell 12 to provide a ground contact for a female plug (not shown) inserted over the pins 18.
  • the two shells 12 and 14 are crimped together by a tab 40.
  • Pins 18 can be either straight or right-angled 34 as shown in FIGS. 1-3.
  • FIGS. 2-4 show the solder joints 22 where the pin 18 is attached to the filter element 16. Holes 31 in the bottom insulator 38 provide bottom exit for pins 18. Hole 30 in the filter member 16 provides the means for passage of pins 18 through the filter member and the location of solder joint 22.
  • FIG. 4 shows only one capacitor unit within the filter element 16 for illustration purposes.
  • the filter element comprises an alumina substrate 42 which has screen printed on one horizontal surface-a metallization 44. This metallization forms a ground electrode that is subsequently soldered 36 to the shell 14.
  • the ground electrode covers substantially the entire surface of the alumina substrate 42. It has holes 24, seen in FIG. 5, which are large enough to accommodate the pins 18 without touching the pins.
  • the ground electrode 44 is partially covered by a screen printed layer of dielectric 46.
  • dielectric 46 For purposes of this specification, a single layer of dielectric is mentioned although in practice two layers of dielectric 46 and 48 are screen printed over the ground electrode to provide more than adequate protection against shorting between electrodes.
  • the dielectric layer 46/48 also has holes 26 which are slightly larger than the diameter of the pins 18.
  • the dielectric 46/48 covers the horizontal surface of the electrode 44 except for the edges 43 and 45 which are soldering areas used for the ground to the shell 14.
  • the dielectric 46/48 also is. applied on the vertical edge of the ground electrode 44 which is contiguous with the holes 24 as seen in FIG. 4.
  • a second metallization layer 50 is screen printed intermittently in a regular pattern usually arrowhead shaped over, the dielectric layer. This forms a series of pin electrodes 50, each of which is in electrical contact with a pin 18 through solder joint 22.
  • This electrode is screen printed in such a manner as to form a series of discrete spaced apart arrowhead-shaped layers distributed over the surface of dielectric 46/48 as seen in FIGS. 5 and 6.
  • the last layer, glass encapsulant 52/54 covers both the electrodes 50 and dielectric 46/48. Although only one layer is shown in FIG. 5, in practice two layers of encapsulant are usually screen printed over the electrode 50 for added safety.
  • the electrode 50 provides a means for closely spacing the capacitors used in the filter connector and, hence, increasing the area of the capacitor and therefore its capacitance value.
  • other designs could be used which satisfy the purpose of producing capacitors of the type employed in this invention.
  • the metallizations used in layers one and three be a noble metal or an alloy of a noble metal.
  • copper metallization compositions could be employed.
  • Particularly preferred is a palladium/silver alloy metallization.
  • Each layer is applied using conventional screen printing methods.
  • the dielectric employed can be any type commonly used in capacitors. However, barium titanate is preferred.
  • the glass encapsulant can be any one of the types used in capacitors having a coefficient of" expansion compatible with the other components employed.
  • a ferrite sleeve 19 also can be attached to the pin 18, as seen in FIG. 8._ Such sleeves are well known as seen in U.S. Patent 4,144,509. The use of the particular filter member of this invention will increase the filtering action of filter connectors employing ferrites.
  • Metallizations used in this.invention are made from compositions containing a finely divided metal powder of either a noble metal or copper, a binder for the metal and a vehicle to disperse the powders evenly.
  • the composition is applied by screen printing methods and the vehicle is removed from the applied composition by firing the screened on layer by conventional techniques.
  • FIGS. 4-5 depict the ground electrode 44 as being.applied as the first metallization layer and the pin electrode 50 as the third layer, this can be reversed. Therefore,.pin electrode 50 can be screen printed directly to the alumina 42 around each hole 41. The layers 46 and 48 are then applied to overlap the layer 50 except for the solder area 22. The ground electrode 44 would then be screen printed over the layers 46 and 48 and all exposed horizontal surfaces of the alumina substrate 42. The encapsulant 52/54 is applied in the same manner as in FIG. 4. The encapsulant covers all exposed surfaces except for edges 43 and 45 which are solder areas.
  • the low inductance at high frequencies achieved by this invention is a direct result of the geometry of the ground electrode as related to the pin electrode. If the ground electrode and dielectric are placed only to one side of the pin, the attenuation curve (a) of FIG. 9 results. This curve shows a reduced attenuation and hence reduced filtering action in the ultra high frequency range, particularly above 200 MHz and more particularly above 700 MHz. The reason for this reduced attenuation is that the capacitor has a series resonance around 200 MHz (shown by the sharp peak in curve (a)) caused by the inductance of the electrodes of the capacitor.

Landscapes

  • Details Of Connecting Devices For Male And Female Coupling (AREA)
  • Fixed Capacitors And Capacitor Manufacturing Machines (AREA)
  • Lubrication Details And Ventilation Of Internal Combustion Engines (AREA)
  • Cleaning And Drying Hair (AREA)
  • Centrifugal Separators (AREA)
  • Piezo-Electric Or Mechanical Vibrators, Or Delay Or Filter Circuits (AREA)
  • Glass Compositions (AREA)
  • Control Of Motors That Do Not Use Commutators (AREA)
EP84302143A 1983-03-30 1984-03-29 Connecteur à filtre incorporé Expired EP0123457B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84302143T ATE31372T1 (de) 1983-03-30 1984-03-29 Steckverbinder mit eingebautem filter.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US48059383A 1983-03-30 1983-03-30
US480593 1983-03-30

Publications (2)

Publication Number Publication Date
EP0123457A1 true EP0123457A1 (fr) 1984-10-31
EP0123457B1 EP0123457B1 (fr) 1987-12-09

Family

ID=23908554

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84302143A Expired EP0123457B1 (fr) 1983-03-30 1984-03-29 Connecteur à filtre incorporé

Country Status (9)

Country Link
EP (1) EP0123457B1 (fr)
JP (1) JPH0695464B2 (fr)
KR (1) KR890004204B1 (fr)
AT (1) ATE31372T1 (fr)
AU (1) AU565595B2 (fr)
BR (1) BR8401386A (fr)
CA (1) CA1216033A (fr)
DE (1) DE3468079D1 (fr)
MX (1) MX159641A (fr)

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0169053A2 (fr) * 1984-07-16 1986-01-22 Nippondenso Co., Ltd. Filtre HF pour instruments électroniques
US4657323A (en) * 1986-01-27 1987-04-14 Itt Corporation D-subminature filter connector
US4764122A (en) * 1986-02-14 1988-08-16 U.S. Philips Corporation Data bus connector
EP0287349A1 (fr) * 1987-04-13 1988-10-19 G & H Technology, Inc. Connecteur électrique à filtre
US4931754A (en) * 1987-07-14 1990-06-05 E. I. Du Pont De Nemours And Company Filter unit for connectors having filter capacitors formed on opposing surfaces of a substrate
US4930200A (en) * 1989-07-28 1990-06-05 Thomas & Betts Corporation Method of making an electrical filter connector
US4992061A (en) * 1989-07-28 1991-02-12 Thomas & Betts Corporation Electrical filter connector
WO1991006136A1 (fr) * 1989-10-12 1991-05-02 Siemens Aktiengesellschaft Connecteur de filtrage
DE9107385U1 (fr) * 1991-06-14 1992-07-16 Filtec Filtertechnologie Fuer Die Elektronikindustrie Gmbh, 4780 Lippstadt, De
EP0569748A2 (fr) * 1992-05-12 1993-11-18 Telenorma Gmbh Condensateur pour un circuit à couches
US5850003A (en) * 1993-10-27 1998-12-15 Athena Neurosciences Transgenic rodents harboring APP allele having swedish mutation
US6033263A (en) * 1996-10-15 2000-03-07 The Whitaker Corporation Electrically connector with capacitive coupling
WO2013045383A1 (fr) 2011-09-26 2013-04-04 Dsm Ip Assets B.V. Nouvelles compositions
WO2013045384A1 (fr) 2011-09-26 2013-04-04 Dsm Ip Assets B.V. Nouvelles compositions

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE68920171D1 (de) * 1988-02-29 1995-02-09 Siemens Ag Bipolarer gefilterter Durchführungsanschluss.
US5415569A (en) * 1992-10-19 1995-05-16 Molex Incorporated Filtered electrical connector assembly
JPH0878101A (ja) * 1994-09-07 1996-03-22 Nippon Carbide Ind Co Inc 電気フィルタアダプタ
US9411956B2 (en) 2008-07-02 2016-08-09 Ricoh Company, Ltd. Locked print with intruder detection and management

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2600320A1 (de) * 1975-01-08 1976-07-15 Bunker Ramo Elektrischer verbinder
DE2925374A1 (de) * 1978-06-22 1980-01-10 Taiyo Yuden Kk Elektrische mehrfach-filteranordnung und verfahren zu ihrer herstellung
DE3016315A1 (de) * 1980-04-28 1981-11-05 Matsushita Electric Industrial Co., Ltd., Kadoma, Osaka Anschlusseinheit

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54111741U (fr) * 1978-01-26 1979-08-06

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2600320A1 (de) * 1975-01-08 1976-07-15 Bunker Ramo Elektrischer verbinder
DE2925374A1 (de) * 1978-06-22 1980-01-10 Taiyo Yuden Kk Elektrische mehrfach-filteranordnung und verfahren zu ihrer herstellung
DE3016315A1 (de) * 1980-04-28 1981-11-05 Matsushita Electric Industrial Co., Ltd., Kadoma, Osaka Anschlusseinheit

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0169053A2 (fr) * 1984-07-16 1986-01-22 Nippondenso Co., Ltd. Filtre HF pour instruments électroniques
EP0169053A3 (en) * 1984-07-16 1986-12-30 Nippondenso Co., Ltd. High frequency filter for electric instruments
US4935710A (en) * 1984-07-16 1990-06-19 Nippondenso Co., Ltd. High frequency filter for electric instruments
US4657323A (en) * 1986-01-27 1987-04-14 Itt Corporation D-subminature filter connector
EP0239424A1 (fr) * 1986-01-27 1987-09-30 Itt Industries, Inc. Connecteur subminiature de type D à filtre
US4764122A (en) * 1986-02-14 1988-08-16 U.S. Philips Corporation Data bus connector
EP0287349A1 (fr) * 1987-04-13 1988-10-19 G & H Technology, Inc. Connecteur électrique à filtre
US4931754A (en) * 1987-07-14 1990-06-05 E. I. Du Pont De Nemours And Company Filter unit for connectors having filter capacitors formed on opposing surfaces of a substrate
US4930200A (en) * 1989-07-28 1990-06-05 Thomas & Betts Corporation Method of making an electrical filter connector
US4992061A (en) * 1989-07-28 1991-02-12 Thomas & Betts Corporation Electrical filter connector
WO1991006136A1 (fr) * 1989-10-12 1991-05-02 Siemens Aktiengesellschaft Connecteur de filtrage
US5246387A (en) * 1989-10-12 1993-09-21 Siemens Aktiengesellschaft Filter plug connector
DE9107385U1 (fr) * 1991-06-14 1992-07-16 Filtec Filtertechnologie Fuer Die Elektronikindustrie Gmbh, 4780 Lippstadt, De
EP0517952A2 (fr) * 1991-06-14 1992-12-16 FILTEC FILTERTECHNOLOGIE FUR DIE ELEKTRONIKINDUSTRIE GmbH Connecteur électrique multipolaire pour lignes de signaux électroniques
EP0517952A3 (en) * 1991-06-14 1993-08-11 Filtec Filtertechnologie Fur Die Elektronikindustrie Gmbh Multipole electrical connector for electronic signal lines
EP0569748A2 (fr) * 1992-05-12 1993-11-18 Telenorma Gmbh Condensateur pour un circuit à couches
EP0569748A3 (fr) * 1992-05-12 1994-03-16 Telefonbau & Normalzeit Gmbh
US5850003A (en) * 1993-10-27 1998-12-15 Athena Neurosciences Transgenic rodents harboring APP allele having swedish mutation
US6033263A (en) * 1996-10-15 2000-03-07 The Whitaker Corporation Electrically connector with capacitive coupling
WO2013045383A1 (fr) 2011-09-26 2013-04-04 Dsm Ip Assets B.V. Nouvelles compositions
WO2013045384A1 (fr) 2011-09-26 2013-04-04 Dsm Ip Assets B.V. Nouvelles compositions

Also Published As

Publication number Publication date
MX159641A (es) 1989-07-20
JPH0695464B2 (ja) 1994-11-24
EP0123457B1 (fr) 1987-12-09
BR8401386A (pt) 1984-11-06
CA1216033A (fr) 1986-12-30
AU2628484A (en) 1984-10-04
KR890004204B1 (ko) 1989-10-27
KR840008227A (ko) 1984-12-13
ATE31372T1 (de) 1987-12-15
JPS59184479A (ja) 1984-10-19
AU565595B2 (en) 1987-09-24
DE3468079D1 (en) 1988-01-21

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