DE1169678B - Burn-in silver that can be used for contacting electrical components - Google Patents

Burn-in silver that can be used for contacting electrical components

Info

Publication number
DE1169678B
DE1169678B DES74005A DES0074005A DE1169678B DE 1169678 B DE1169678 B DE 1169678B DE S74005 A DES74005 A DE S74005A DE S0074005 A DES0074005 A DE S0074005A DE 1169678 B DE1169678 B DE 1169678B
Authority
DE
Germany
Prior art keywords
silver
copper
burn
stoving
oxide
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.)
Pending
Application number
DES74005A
Other languages
German (de)
Inventor
Dipl-Chem Manfred Hoefinger
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.)
Siemens AG
Original Assignee
Siemens AG
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 Siemens AG filed Critical Siemens AG
Priority to DES74005A priority Critical patent/DE1169678B/en
Priority to FR892571A priority patent/FR1318461A/en
Priority to GB1900362A priority patent/GB949005A/en
Priority to US291283A priority patent/US3220808A/en
Publication of DE1169678B publication Critical patent/DE1169678B/en
Pending legal-status Critical Current

Links

Classifications

    • 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
    • H01B1/14—Conductive material dispersed in non-conductive inorganic material
    • H01B1/16—Conductive material dispersed in non-conductive inorganic material the conductive material comprising metals or alloys
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
    • B23K35/001—Interlayers, transition pieces for metallurgical bonding of workpieces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
    • B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
    • B23K35/24—Selection of soldering or welding materials proper
    • B23K35/30—Selection of soldering or welding materials proper with the principal constituent melting at less than 1550 degrees C
    • B23K35/3006—Ag as the principal constituent
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C5/00—Alloys based on noble metals
    • C22C5/06—Alloys based on 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

Description

BUNDESREPUBLIK DEUTSCHLANDFEDERAL REPUBLIC OF GERMANY

DEUTSCHESGERMAN

PATENTAMTPATENT OFFICE

AUSLEGESCHRIFTEDITORIAL

Internat. Kl.: C 22 cBoarding school Class: C 22 c

Nummer:
Aktenzeichen:
Anmeldetag:
Auslegetag:Number:
File number:
Registration date:
Display day:

Deutsche KL: 40 b-5/00 German KL: 40 b -5/00

1169 678
S 74005 VI a/40 b
17. Mai 1961
6. Mai 19641169 678
S 74005 VI a / 40 b
May 17, 1961
May 6, 1964

Die Erfindung betrifft ein als Lötauflage geeignetes Einbrennsilber.The invention relates to a burn-in silver suitable as a soldering pad.

Das sogenannte Einbrennsilber wird beispielsweise verwendet, um an sich nicht lötfähige Metallschichten, insbesondere sehr dünne Metallschichten, die sich auf Trägerunterlagen befinden, zum Zweck der Verbindung mit anderen metallischen Teilen lötbar zu machen.The so-called burn-in silver is used, for example, to create non-solderable metal layers, in particular, very thin metal layers that are on carrier substrates for the purpose of To make connection with other metallic parts solderable.

Derartige Silberpräparate enthalten im allgemeinen als Haftoxyde zu bezeichnende Glasbildner, wie beispielsweise bleihaltige Silikate. Diese Haftoxyde schmelzen beim Einbrennvorgang auf die Unterlage auf und gewährleisten damit die gute Haftung des Silbers. Hierfür ist es erforderlich, daß die Einbrenntemperatur oberhalb des Erweichungspunktes der verwendeten Haftoxyde liegt.Such silver preparations generally contain glass formers, such as, for example, to be designated as adhesive oxides lead-containing silicates. These adhesive oxides melt onto the base during the baking process and thus ensure good adhesion of the silver. For this it is necessary that the stoving temperature is above the softening point of the adhesive oxides used.

Es wurde festgestellt, daß sich die bekannte hohe Beweglichkeit der Silberionen bei höheren Temperaturen auf die Eigenschaften der dünnen Metallschichten besonders an den Übergangsstellen nachteilig auswirkt. Die Silberionen diffundieren in die Metallschichten, wobei es zu Legierungsbildung kommt. Dies führt unter Umständen infolge Volumenkontraktion und unterschiedlicher Ausdehnungskoeffizienten der entstandenen Legierungen zu Rissebildungen besonders an der Übergangsstelle Silberschicht-Metallschicht. It was found that the well-known high mobility of silver ions at higher temperatures has a detrimental effect on the properties of the thin metal layers, especially at the transition points. The silver ions diffuse into the metal layers, creating an alloy. This may lead to volume contraction and the different expansion coefficients of the resulting alloys to the formation of cracks in particular at the transition point between the silver layer and the metal layer.

Aufgabe der Erfindung war es, die hohe Ionenbeweglichkeit des Silbers herabzusetzen, bzw. die Diffusion der Silberionen in die Metallschicht einzudämmen. Erfindungsgemäß enthält das für die Kontaktierung von elektrischen Bauelementen verwendbare Einbrennsilber einen Zusatz von 0,5 bis 10 Gewichtsprozent Kupfer(II)-Oxyd oder einer dieses Kupferoxyd beim Einbrennprozeß bildenden Kupferverbindung und 0 bis 15 Gewichtsprozent an sich bekannter Haftoxyde.The object of the invention was to reduce or reduce the high ion mobility of silver Curb diffusion of silver ions into the metal layer. According to the invention contains for the Contacting of electrical components usable burn-in silver an addition of 0.5 up to 10 percent by weight of copper (II) oxide or one of these copper oxide forms during the baking process Copper compound and 0 to 15 percent by weight of known adhesive oxides.

Die Wirkung des erfindungsgemäßen Zusatzes einer erfindungsgemäßen Kupferverbindung ist überraschend und besteht darin, daß die Silberwanderung stark herabgesetzt wird, so daß ein Diffundieren des Silbers in und auf die Metallschicht weitgehend vermieden wird. Diese Wirkung war nicht vorhersehbar, da das Kupfer(II)-Oxyd bei den im allgemeinen für den Einbrennprozeß angewendeten Temperaturen (550 bis 750° C) weder dissoziiert noch schmilzt. Das Einbrennsilber enthält zweckmäßig außer dem Zusatz einer Kupferverbindung auch noch an sich bekannte Haftoxyde. Besteht z. B. der Träger der Metallschicht aus Glas, so ist es vorteilhaft, Haftoxyde zu wählen, deren Erweichungspunkte in der Nähe des Transformationspunktes des Glases liegen.The effect of the addition according to the invention of a copper compound according to the invention is surprising and is that the silver migration is greatly reduced, so that diffusion of the Silver in and on the metal layer is largely avoided. This effect was not foreseeable, because the copper (II) oxide at the temperatures generally used for the baking process (550 to 750 ° C) neither dissociates nor melts. The stoving silver expediently contains the additive a copper compound also known adhesive oxides. Is there e.g. B. the carrier of the metal layer made of glass, so it is advantageous to choose adhesive oxides whose softening points are close to the Transformation point of the glass lie.

409 588/333 4.64409 588/333 4.64

Für die Kontaktierung von elektrischen
Bauelementen verwendbares EinbrennsilberFor contacting electrical
Burn-in silver that can be used for components

Anmelder:Applicant:

Siemens & Halske Aktiengesellschaft,
Berlin und München,
München 2, Wittelsbacherplatz 2Siemens & Halske Aktiengesellschaft,
Berlin and Munich,
Munich 2, Wittelsbacherplatz 2

Als Erfinder benannt:Named as inventor:

Dipl.-Chem. Manfred Höfinger, HeidenheimDipl.-Chem. Manfred Höfinger, Heidenheim

Die Haftfestigkeit und die Lötbarkeit sowie das Auftragsverfahren des Einbrennsilbers werden durch den erfindungsgemäßen Zusatz nicht beeinflußt.
Die Kupferverbindung wird dem Silberpräparat in feinpulverisiertem Zustand zugesetzt, so daß das erfindungsgemäße Einbrennsilber als trockenes Pulver entsteht. Das Pulvergemisch kann aber auch in an sich bekannter Weise in einem Suspensionsmittel aufgeschlämmt werden, oder die Kupferverbindung wird als Lösung einer Silbersuspension zugesetzt.The adhesive strength and the solderability as well as the method of application of the stoving silver are not influenced by the additive according to the invention.
The copper compound is added to the silver preparation in a finely powdered state, so that the stoved silver according to the invention is produced as a dry powder. The powder mixture can, however, also be slurried in a suspension medium in a manner known per se, or the copper compound is added as a solution to a silver suspension.

Claims (4)

Patentansprüche:Patent claims: 1. Für die Kontaktierung von elektrischen Bauelementen verwendbares Einbrennsilber, dadurch gekennzeichnet, daß das Einbrennsilber einen Zusatz von 0,5 bis 10 Gewichtsprozent Kupfer(II)-Oxyd oder einer dieses Kupferoxyd beim Einbrennprozeß bildenden Kupferverbindung und 0 bis 15 Gewichtsprozent an sich bekannter Haftoxyde enthält.1. Burn-in silver that can be used for contacting electrical components, thereby characterized in that the stoved silver has an addition of 0.5 to 10 percent by weight Copper (II) oxide or one of these copper oxide forms during the baking process Copper compound and 0 to 15 percent by weight of known adhesive oxides. 2. Einbrennsilber nach Anspruch 1, dadurch gekennzeichnet, daß das Kupfer-II-Oxyd oder die Kupferverbindung zusammen mit dem Silber in feinpulverisierter Form in an sich bekannter Weise in einem Suspensionsmittel aufgeschlämmt ist.2. stoving silver according to claim 1, characterized in that the copper (II) oxide or the copper compound together with the silver in finely powdered form in a known manner Way is slurried in a suspending agent. 3. Einbrennsilber nach Anspruch 1, dadurch gekennzeichnet, daß die beim Einbrennprozeß Kupfer(II)-Oxyde bildende Kupferverbindung als Lösung der Silbersuspension zugesetzt ist.3. stoving silver according to claim 1, characterized in that the stoving process Copper compound forming copper (II) oxides is added as a solution to the silver suspension. 4. Einbrennsilber nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß es zu seiner Verwendung auf Glasträgerkörpern Haftoxyde enthält, deren Erweichungspunkte in der Nähe des Transformationspunktes des als Träger benutzten Glases liegen.4. Burn-in silver according to one of claims 1 to 3, characterized in that it is his Use on glass substrates contains adhesive oxides whose softening points are in the vicinity of the transformation point of the glass used as a carrier.
DES74005A 1961-05-17 1961-05-17 Burn-in silver that can be used for contacting electrical components Pending DE1169678B (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
DES74005A DE1169678B (en) 1961-05-17 1961-05-17 Burn-in silver that can be used for contacting electrical components
FR892571A FR1318461A (en) 1961-05-17 1962-03-28 Solder silver usable for contacting electrical building elements or similar applications
GB1900362A GB949005A (en) 1961-05-17 1962-05-17 Improvements in or relating to stoving silvers
US291283A US3220808A (en) 1961-05-17 1963-06-28 Alloys

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DES74005A DE1169678B (en) 1961-05-17 1961-05-17 Burn-in silver that can be used for contacting electrical components

Publications (1)

Publication Number Publication Date
DE1169678B true DE1169678B (en) 1964-05-06

Family

ID=7504345

Family Applications (1)

Application Number Title Priority Date Filing Date
DES74005A Pending DE1169678B (en) 1961-05-17 1961-05-17 Burn-in silver that can be used for contacting electrical components

Country Status (2)

Country Link
DE (1) DE1169678B (en)
GB (1) GB949005A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2125643A1 (en) * 1970-05-26 1971-12-16 Cogar Corp Electrical conductors and semiconductor components and processes for their manufacture

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2125643A1 (en) * 1970-05-26 1971-12-16 Cogar Corp Electrical conductors and semiconductor components and processes for their manufacture

Also Published As

Publication number Publication date
GB949005A (en) 1964-02-05

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