EP2791395A1 - Kontaktelement und verfahren zu seiner herstellung - Google Patents
Kontaktelement und verfahren zu seiner herstellungInfo
- Publication number
- EP2791395A1 EP2791395A1 EP12779021.0A EP12779021A EP2791395A1 EP 2791395 A1 EP2791395 A1 EP 2791395A1 EP 12779021 A EP12779021 A EP 12779021A EP 2791395 A1 EP2791395 A1 EP 2791395A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- contact element
- contact
- surface coating
- tin
- silver
- 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.)
- Withdrawn
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/0009—Details relating to the conductive cores
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D3/00—Electroplating: Baths therefor
- C25D3/02—Electroplating: Baths therefor from solutions
- C25D3/56—Electroplating: Baths therefor from solutions of alloys
- C25D3/60—Electroplating: Baths therefor from solutions of alloys containing more than 50% by weight of tin
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D3/00—Electroplating: Baths therefor
- C25D3/02—Electroplating: Baths therefor from solutions
- C25D3/56—Electroplating: Baths therefor from solutions of alloys
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D3/00—Electroplating: Baths therefor
- C25D3/02—Electroplating: Baths therefor from solutions
- C25D3/56—Electroplating: Baths therefor from solutions of alloys
- C25D3/64—Electroplating: Baths therefor from solutions of alloys containing more than 50% by weight of silver
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B1/00—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors
- H01B1/02—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors mainly consisting of metals or alloys
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B1/00—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors
- H01B1/02—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors mainly consisting of metals or alloys
- H01B1/023—Alloys based on aluminium
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B1/00—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors
- H01B1/02—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors mainly consisting of metals or alloys
- H01B1/026—Alloys based on copper
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D5/00—Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
- C25D5/48—After-treatment of electroplated surfaces
-
- 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
- H01R13/02—Contact members
- H01R13/03—Contact members characterised by the material, e.g. plating, or coating materials
Definitions
- the invention relates to a contact element according to claim 1 and a method for its production according to claim 12.
- connection techniques such as insulation displacement, crimping or crimping, spring contacts, rivet contacts, screw contacts, caulking, folding and bending of lead frames and / or the encapsulation of
- the invention is based on the recognition that surfaces of pure tin or surfaces of tin with a low silver content at a mechanical load of the surfaces with regard to the Whisker Struktur represent a high risk. It is therefore the object of the invention to minimize the risk of whisker formation in contact elements, such as those used in a motor vehicle. This object is achieved by the galvanic surface coating according to the invention.
- the surface coating according to the invention is distinguished by a very high silver content of the tin-silver alloy of between 15 and 73
- the silver content is preferably at least 30
- Mass percent more preferably between 45 and 60 mass percent.
- Contact elements with the surface coating of the invention show a significantly reduced compared to conventional coatings
- Wh isker waxing m.
- the surface coating according to the invention is in the
- connection techniques are used contact elements, for example, to make electrical contact between an electrical circuit on a circuit board and a contact wire. All these different joining techniques have in common that act at the contact elements used in each case by the contact forces and or bending forces very high surface pressures and layer stresses on or in the surface of the contact element. In the areas of high
- Another advantage of the surface coating according to the invention is that a controlled proportion of the addition of silver, the targeted optimization of contact resistance and the current carrying capacity of the electrical contact is possible.
- the higher the silver content in the surface coating the better the conductivity and current carrying capacity of the electrical contact. This is particularly advantageous for plug contacts.
- the choice of the silver content the influence of the
- Connector area arise can be reduced.
- the respective contact element are provided with the surface coating of the invention from a tin-silver alloy. It is also possible to completely or largely completely coat the surface of the contact element. It is preferable to provide the surface layering at least in the areas in which the production of the electrical contact, the largest mechanical
- a contact element according to the invention which is designed as an insulation displacement element, has, in a known manner, a wire receptacle which is designed to contact and retain a longitudinal section of a contact wire during insertion into the wire receptacle in a penetrating and / or press-fitting manner. Due to the deformation is the area
- the surface coating according to the invention which has a tin-silver alloy with a silver content of 15 to 73 percent by mass, is therefore preferred at least in the region of the wire receptacle of
- a contact element according to the invention which is designed to produce an electrical contact by crimping, has areas that are plastically deformed, thereby forming into a mating contact, such as e.g. pressed a wire and thereby produce a non-detachable electrical contact.
- a surface coating comprising a tin-silver alloy having a silver content of 15 to 73% by mass is provided at least in the areas where high surface pressures result from the plastic deformation.
- a contact element according to the invention which has a spring contact
- the regions which are designed to resiliently press on the mating contact and thus to achieve an electrical contact, are high
- the contact element consists essentially of copper, iron or aluminum or an alloy having at least one of these metals as an essential component.
- the contact element is formed as a stamped grid. This is understood to mean a contact element that is formed by stamping from a metal sheet. It is preferably arranged to produce an electrical contact by folding and / or bending the stamped grid. In these areas, the contact element is exposed to high mechanical loads, which is why preferably there
- the contact element is at least partially encapsulated in plastic, for example to represent a plug part or to protect the contact element.
- plastic for example to represent a plug part or to protect the contact element.
- a surface coating comprising a tin-silver alloy having a silver content of 15 to 73 mass% is provided.
- Contact element before depositing the tin-silver surface coating be at least partially nickel-plated, so have a coating of nickel or a nickel layer on which the tin-silver surface of the invention.
- the nickel layer improves the surface properties in terms of hardness and abrasion resistance. Furthermore, the contact element is protected against corrosion. To protect and / or improve the sliding properties, the SnAg
- a protective layer which in particular has a lubricant or a lubricant to be covered.
- This protective layer further causes a passivation of the tin-silver surface coating.
- Possible materials for the protective layer are, for example, thiol, paraffin or a contact oil such as Optimol® in question.
- the surface coating of tin-silver is preferably deposited on the contact element galvanically, in particular from an acidic or strongly acidic tin-silver plating alloy electrolyte.
- the galvanic coating has the advantage that a finely crystalline and uniform alloy of tin and silver is formed.
- the coating has a thickness between 0.1 ⁇ and 12 ⁇ , more preferably between 0.20 and 1.8 ⁇ .
- the galvanic coating is preferably carried out in a continuous system (Bandgalvanikstrom) with multiple cells.
- the contact element is guided by cells in series, wherein the cells are filled with methanesulfonic acid, in which tin ions and silver ions are dissolved, and wherein the cell contents are circulated during the electroplating in the cell.
- the contact element is in the cells by means of nozzles which are arranged within the cells, with methanesulfonic acid in which tin ions and silver ions are dissolved, is flown. This ensures that even contact elements with complicated geometries can be reliably coated.
- the coating in such a strip galvanic plant is particularly advantageous when the contact element is present as a stamped grid component.
- Contact element is preferably moved as part of a band-shaped punched grid through the cell. After the band-shaped stamped grid has passed through the Bandgalvanikstrom, the individual contact elements can be separated. This simplifies handling.
- the coating according to the invention of contact elements can also be effected by means of a so-called bulk material electroplating, also referred to as drum electroplating.
- the cell is constructed drum-like and, as with
- Methanesulfonic acid filled in which tin and silver ions are dissolved The drum is filled with the components to be coated and rotates slowly.
- This coating method is especially for contact elements suitable, which are not present as part of a stamped grid, such as screws or rivets.
- a reflow or tempering treatment of the contact element can be carried out in a known manner after or before the galvanic coating, whereby the surface properties are further improved as required or adapted to the application.
- Figure 1 shows an inventive contact element for connecting a lead wire with a contact pin.
- FIG. 2 shows a crimp connection in a spatial view as well as in FIG
- FIG. 3 shows a contact element according to the invention for a
- FIG. 4 shows a schematic representation of a cell of FIG
- Figure 1 illustrates a contact element 10 according to the invention, which produces an electrical contact between a contact pin 18, which is designed as a blade contact and a connecting wire 50, which is designed as a stranded wire.
- the contact element has a first portion, which as
- the legs 13a and 13b thereby press from two sides on the contact pin 18 and hold it firmly and make an electrical contact.
- a separate component 14 is provided in stainless steel in this example, which is clasped over the spring contact 12 and applies pressure to the legs 13a and 13b.
- the contact element 10 has a second portion which acts as a crimp contact
- the section 16 is formed. The first portion and the second portion are connected by an intermediate portion 11.
- the section has a wire receptacle 15 with a substantially U-shaped cross-section, in which a wire 50 is inserted.
- the section 16 has two wing-like extensions 17a and 17b.
- the extensions 17a and 17b are bevelled blade-like at their free ends.
- the projections 17a and 17b are bent by a suitable tool and cut with their free ends in the wire 50.
- Figure 2B which shows a cross section through the crimp contact 16
- the wire 50 the consists of individual strands 52 is compressed.
- the contact element 10 is at least in the sections 12 and 16 with a surface coating 30 provided.
- the layer thickness of this coating is in this example between 0.25 and 0.6 ⁇ .
- the coating consists in the shown
- FIG. 3 shows a contact element 20 for an insulation displacement contact 42.
- the contact element 20 has a wire receptacle 48 which is designed to contact and hold a longitudinal section of a contact wire 50 during insertion into the wire receptacle 48 in a cutting and / or press-fitting manner.
- the wire is in the illustrated by the arrow 22
- a wire receptacle 48 is formed as a solid or elastic V-shaped notch and is also referred to as a cutting clamp. This cutting clamp 48 and the wire 50 deform during the Pressing the wire 50 into the V-shaped notch of the
- Cutting clamp 48 plastic and elastic and adapt to each other in terms of their contour. In this way, the wire 50 directly contacts the insulation displacement terminal 48. The deformation exposes the region of the insulation displacement terminal 48 to high mechanical stresses. In the area of the cutting clamp
- a surface coating 30 made of a tin-silver alloy having a silver content of preferably 55 to 60 mass% is provided.
- FIG. 4 shows a schematic view of such a cell in a top view.
- Band-shaped punched grids (not shown) are placed on a belt 210 in FIG.
- an electrolyte 220 In the cell is an electrolyte 220.
- the electrolyte 220 in this example is an aqueous one
- Methanesulfonic acid in which the tin and the silver ions are dissolved.
- the electrolyte is pumped in the cell in a circulatory manner, with delivery into the cell 200 via nozzles 260 which apply to the belt 210, but obliquely in the direction of movement of the belt 220, as indicated by the arrows 270.
- a suitable material for the plate-shaped anodes 240 is pure tin.
- the silver ions are preferably in liquid and / or dissolved form, the
- Tin ions are preferably added in the form of stannous methanesulfonate and / or by the solubility of the tin anodes.
- the composition of the resulting tin-silver surface coating depends on the concentration of silver and tin ions, as well as on the current density. According to the invention, the operating parameters are adjusted so that a
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Electroplating Methods And Accessories (AREA)
- Manufacturing Of Electrical Connectors (AREA)
- Electroplating And Plating Baths Therefor (AREA)
- Contacts (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102011088211A DE102011088211A1 (de) | 2011-12-12 | 2011-12-12 | Kontaktelement und Verfahren zu seiner Herstellung |
PCT/EP2012/070763 WO2013087268A1 (de) | 2011-12-12 | 2012-10-19 | Kontaktelement und verfahren zu seiner herstellung |
Publications (1)
Publication Number | Publication Date |
---|---|
EP2791395A1 true EP2791395A1 (de) | 2014-10-22 |
Family
ID=47088848
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP12779021.0A Withdrawn EP2791395A1 (de) | 2011-12-12 | 2012-10-19 | Kontaktelement und verfahren zu seiner herstellung |
Country Status (7)
Country | Link |
---|---|
US (1) | US20140299351A1 (de) |
EP (1) | EP2791395A1 (de) |
JP (1) | JP5840802B2 (de) |
KR (1) | KR20140100958A (de) |
CN (1) | CN103987879B (de) |
DE (1) | DE102011088211A1 (de) |
WO (1) | WO2013087268A1 (de) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102012016238B4 (de) * | 2012-08-16 | 2020-01-02 | GM Global Technology Operations LLC (n. d. Ges. d. Staates Delaware) | Verfahren zur Beseitigung von elektrischen Kurzschlüssen und Diagnosegerät |
JP6361477B2 (ja) | 2014-11-19 | 2018-07-25 | 株式会社オートネットワーク技術研究所 | コネクタ用端子 |
DE102014117410B4 (de) * | 2014-11-27 | 2019-01-03 | Heraeus Deutschland GmbH & Co. KG | Elektrisches Kontaktelement, Einpressstift, Buchse und Leadframe |
DE102015003285A1 (de) * | 2015-03-14 | 2016-09-15 | Diehl Metal Applications Gmbh | Verfahren zur Beschichtung eines Einpresspins und Einpresspin |
US11280014B2 (en) * | 2020-06-05 | 2022-03-22 | Macdermid Enthone Inc. | Silver/tin electroplating bath and method of using the same |
Family Cites Families (32)
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US2515022A (en) * | 1947-04-02 | 1950-07-11 | Anaconda Wire & Cable Co | Method of tinning copper wire |
GB1287209A (en) * | 1970-12-23 | 1972-08-31 | Mullard Ltd | Gunn oscillator |
US4581820A (en) * | 1983-06-03 | 1986-04-15 | General Staple Company, Inc. | Method of making an electrical connector system and a terminal therefore |
EP0666342B1 (de) * | 1994-02-05 | 1998-05-06 | W.C. Heraeus GmbH | Bad zum galvanischen Abscheiden von Silber-Zinn-Legierungen |
US5624273A (en) * | 1995-04-21 | 1997-04-29 | The Whitaker Corporation | Insulation displacement contact with strain relief |
US5679471A (en) * | 1995-10-16 | 1997-10-21 | General Motors Corporation | Silver-nickel nano-composite coating for terminals of separable electrical connectors |
US5780172A (en) * | 1995-12-18 | 1998-07-14 | Olin Corporation | Tin coated electrical connector |
JP3034213B2 (ja) * | 1996-01-30 | 2000-04-17 | 長野県 | 金属錯体形成用水溶液、錫−銀合金めっき浴およびこのめっき浴を用いためっき物の製造方法 |
WO1997028296A1 (en) * | 1996-01-30 | 1997-08-07 | Naganoken | Aqueous solution for forming metal complexes, tin-silver alloy plating bath, and process for producing plated object using the plating bath |
US5667659A (en) * | 1996-04-04 | 1997-09-16 | Handy & Harman | Low friction solder electrodeposits |
JPH10134869A (ja) * | 1996-10-30 | 1998-05-22 | Yazaki Corp | 端子材料および端子 |
JP3286560B2 (ja) * | 1997-04-28 | 2002-05-27 | 株式会社オートネットワーク技術研究所 | 嵌合型接続端子 |
JPH11106990A (ja) * | 1997-09-30 | 1999-04-20 | Nippon Mining & Metals Co Ltd | 長尺金属条ストライプめっき方法及び装置 |
WO2001004368A1 (fr) * | 1999-07-07 | 2001-01-18 | Tanaka Kikinzoku Kogyo K.K. | Matiere de contact electrique pour relais d'automobile et relais d'automobile utilisant ladite matiere |
US6361823B1 (en) * | 1999-12-03 | 2002-03-26 | Atotech Deutschland Gmbh | Process for whisker-free aqueous electroless tin plating |
DE10014852A1 (de) * | 2000-03-24 | 2001-09-27 | Enthone Omi Deutschland Gmbh | Verfahren zur Abscheidung einer Silber-Zinn-Legierung |
DE10129648C2 (de) * | 2000-06-20 | 2003-06-26 | Siemens Ag | Verfahren und Anordnung zum elektromechanischen Beschichten von Metallelementen |
EP2045362A1 (de) * | 2001-01-19 | 2009-04-08 | The Furukawa Electric Co., Ltd. | Plattiertes Material, Herstellungsverfahren und elektrisches bzw. elektronisches Teil damit |
ITTO20010672A1 (it) * | 2001-07-10 | 2003-01-10 | Magneti Marelli Climat Srl | Metodo per il fissaggio di componenti ad un condotto di circolazione di un fluido facente parte di uno scambiatore di calore, in particolare |
US6924044B2 (en) * | 2001-08-14 | 2005-08-02 | Snag, Llc | Tin-silver coatings |
US6878004B2 (en) * | 2002-03-04 | 2005-04-12 | Littelfuse, Inc. | Multi-element fuse array |
DE10245343A1 (de) * | 2002-09-27 | 2004-04-08 | Robert Bosch Gmbh | Elektrischer Kontakt |
CN1221676C (zh) * | 2003-04-03 | 2005-10-05 | 章景兴 | 银氧化锡氧化铜合金电触点及其生产工艺 |
JP4367149B2 (ja) * | 2004-01-30 | 2009-11-18 | 日立電線株式会社 | フラットケーブル用導体及びその製造方法並びにフラットケーブル |
DE102005055742A1 (de) * | 2005-11-23 | 2007-05-24 | Robert Bosch Gmbh | Verfahren zum Herstellen einer kontaktgeeigneten Schicht auf einem Metallelement |
US8343326B2 (en) * | 2006-10-06 | 2013-01-01 | Basf Corporation | Acid mist mitigation agents for electrolyte solutions |
JP4834023B2 (ja) * | 2007-03-27 | 2011-12-07 | 古河電気工業株式会社 | 可動接点部品用銀被覆材およびその製造方法 |
JP4834022B2 (ja) * | 2007-03-27 | 2011-12-07 | 古河電気工業株式会社 | 可動接点部品用銀被覆材およびその製造方法 |
WO2009005042A1 (ja) * | 2007-06-29 | 2009-01-08 | The Furukawa Electric Co., Ltd. | 金属材料、その製造方法、及びそれを用いた電気電子部品 |
WO2009117639A2 (en) | 2008-03-20 | 2009-09-24 | Interplex Nas, Inc. | Press fit (compliant) terminal and other connectors with tin-silver compound |
JPWO2010005088A1 (ja) * | 2008-07-11 | 2012-01-05 | 第一電子工業株式会社 | 電子部品およびその製造方法 |
JP2012140678A (ja) * | 2010-12-28 | 2012-07-26 | Kyowa Densen Kk | 曲げ加工部のウィスカ発生を防止するめっき被膜部材、これを用いた電気電子部品、並びにめっき被膜部材の製造方法とめっき皮膜部材のウィスカ発生防止方法 |
-
2011
- 2011-12-12 DE DE102011088211A patent/DE102011088211A1/de not_active Withdrawn
-
2012
- 2012-10-19 EP EP12779021.0A patent/EP2791395A1/de not_active Withdrawn
- 2012-10-19 WO PCT/EP2012/070763 patent/WO2013087268A1/de active Application Filing
- 2012-10-19 US US14/364,397 patent/US20140299351A1/en not_active Abandoned
- 2012-10-19 KR KR1020147015797A patent/KR20140100958A/ko not_active Application Discontinuation
- 2012-10-19 CN CN201280060972.9A patent/CN103987879B/zh active Active
- 2012-10-19 JP JP2014546375A patent/JP5840802B2/ja active Active
Non-Patent Citations (2)
Title |
---|
None * |
See also references of WO2013087268A1 * |
Also Published As
Publication number | Publication date |
---|---|
CN103987879A (zh) | 2014-08-13 |
DE102011088211A1 (de) | 2013-06-13 |
JP5840802B2 (ja) | 2016-01-06 |
CN103987879B (zh) | 2017-11-17 |
KR20140100958A (ko) | 2014-08-18 |
WO2013087268A1 (de) | 2013-06-20 |
JP2015505906A (ja) | 2015-02-26 |
US20140299351A1 (en) | 2014-10-09 |
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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 |
|
17P | Request for examination filed |
Effective date: 20140714 |
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