EP0379948A2 - Aqueous acid solutions for the electrodeposition of tin and/or lead/tin alloys - Google Patents
Aqueous acid solutions for the electrodeposition of tin and/or lead/tin alloys Download PDFInfo
- Publication number
- EP0379948A2 EP0379948A2 EP90100870A EP90100870A EP0379948A2 EP 0379948 A2 EP0379948 A2 EP 0379948A2 EP 90100870 A EP90100870 A EP 90100870A EP 90100870 A EP90100870 A EP 90100870A EP 0379948 A2 EP0379948 A2 EP 0379948A2
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- EP
- European Patent Office
- Prior art keywords
- tin
- optionally
- lead
- aqueous
- weight
- 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.)
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Classifications
-
- 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
- C25D3/30—Electroplating: Baths therefor from solutions of tin
- C25D3/32—Electroplating: Baths therefor from solutions of tin characterised by the organic bath constituents used
-
- 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
- C25D3/60—Electroplating: Baths therefor from solutions of alloys containing more than 50% by weight of tin
Definitions
- the present invention relates to aqueous, acidic solutions for the electrolytic deposition of tin and / or lead / tin alloys containing a mixture of tin and / or lead salts of an alkanesulfonic acid, free alkanesulfonic acid, the alkyl group of the alkanesulfonic acid consisting of 1 to 5 carbon atoms , non-ionic wetting agent and optionally aromatic short-chain aldehydes and / or optionally aromatic ketones and / or optionally short-chain unsaturated carboxylic acids.
- DE-PS 1 260 262 describes aldol condensation products which are added to aqueous baths for the electrodeposition of tin as brighteners.
- US Pat. No. 2,525,942 relates to the use of alkanesulfonic acid derivatives in solution for metal deposition.
- US Pat. No. 4,582,576 describes a process which deposits shiny tin-tin / lead layers from baths containing alkanesulfonic acid.
- aqueous, acidic solutions described therein contain metal salts, free alkane or alkanol sulfonic acid, wetting agents, a short-chain aliphatic aldehyde, an aromatic aldehyde, optionally an aromatic ketone and an unsaturated, short-chain carboxylic acid.
- the compositions described there have the disadvantage that they have only poor resilience in the high current density range.
- the object on which the invention is based is to provide aqueous, acidic solutions which have a better load-bearing capacity in the high current density range and enable uniform gloss scattering over the entire current density range.
- an aqueous, acidic solution for the electrolytic deposition of tin and / or lead / tin alloys containing a mixture of tin and / or lead salts of an alkanesulfonic acid, free alkanesulfonic acid, the alkyl group of the alkanesulfonic acid consists of 1 to 5 ° C atoms, non-ionic wetting agent and optionally aromatic short-chain aldehydes and / or optionally aromatic ketones and / or optionally short-chain unsaturated carboxylic acids, characterized in that a mixture of a reaction product of acetaldehyde and / or its as a further brightener Aldol condensation products containing ammonia and / or acyclic ketones and / or aliphatic amines, amides, amino acids and / or hydrazine compounds.
- a non-ionic wetting agent of the alkylaryl polyglycol ether type is preferably selected as the wetting agent. If a mixture of a reaction product of acetaldehyde and / or its aldol condensation products with acyclic ketones is chosen as the brightening agent, the aliphatic ketone preferably contains 10 carbon atoms in the molecule. Naphthaldehyde, chloroacetophenone or benzalacetone, formaldehyde or acetaldehyde and, as unsaturated carboxylic acid, methacrylic acid or methyl methacrylic acid are preferably added to the mixture in a preferred manner.
- the aqueous, acidic solutions according to the invention preferably contain 5 to 25% by weight of the corresponding metal salt or salts, 6 to 20% by weight of the alkanesulfonic acid, 0.1 to 5% by weight of non-ionic wetting agent, 0.1 to 5 %
- the aldol condensation product if 0.1 to 3% of the aromatic aldehyde, optionally 0.01 to 1.0% by weight of the aromatic ketone, optionally 0.01 to 1.0% by weight of the short-chain aliphatic aldehyde, and optionally 0.01 to 1% of the unsaturated carboxylic acid.
- the information relates to mixtures that are adjusted to 1 liter of finished solution.
- aldol condensation products according to DE-PS 1 260 262 in a process for the electrolytic deposition of tin and / or lead / tin alloys surprisingly leads to improved galvanic deposition in the high current density range, and at the same time uniform gloss scattering is achieved in the low current density range.
- Process parameters The usability of the electrolyte was tested for tin and / or lead / tin deposition in a Hull cell in accordance with DIN 50 957. Temperature: 20 - 25 ° C, exposure time: 5 minutes with mechanical stirring, anode tin or lead-tin analogous to the composition of the precipitation. Sheet steel cathode material, cell current 2, 3 or 4 amps per cell.
- Examples 1 to 4 each ensure very good galvanic deposition in the high current density range and at the same time ensure uniform gloss scattering in the low current density range.
- Example 1 of the US patent a uniform gloss was only achieved in the range of 1-8 amperes / dm 2 at 2 ampere cell current. Amorphous burns occurred above 8 A / dm2. In the low current density range ⁇ 1 A / dm2, the deposition was milky matt.
- the sheet After adding 10 ml / l of the additive according to the invention, the sheet was uniformly shiny from 0.2 to 10 A / dm 2.
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Electroplating And Plating Baths Therefor (AREA)
- Electrolytic Production Of Metals (AREA)
Abstract
Description
Gegenstand der vorliegenden Erfindung sind wäßrige, saure Lösungen für die elektrolytische Abscheidung von Zinn und/oder Blei/Zinnlegierungen enthaltend ein Gemisch aus Zinn- und/oder Bleisalzen einer Alkansulfonsäure, freier Alkansulfonsäure, wobei die Alkylgruppe der Alkansulfonsäure aus 1 bis 5 C-Atomen besteht, nicht ionogenem Netzmittel und gegebenenfalls aromatischen kurzkettigen Aldehyden und/oder gegebenenfalls aromatischen Ketonen und/oder gegebenenfalls kurzkettigen ungesättigten Carbonsäuren.The present invention relates to aqueous, acidic solutions for the electrolytic deposition of tin and / or lead / tin alloys containing a mixture of tin and / or lead salts of an alkanesulfonic acid, free alkanesulfonic acid, the alkyl group of the alkanesulfonic acid consisting of 1 to 5 carbon atoms , non-ionic wetting agent and optionally aromatic short-chain aldehydes and / or optionally aromatic ketones and / or optionally short-chain unsaturated carboxylic acids.
In der DE-PS 1 260 262 werden Aldolkondensationsprodukte beschrieben, die wäßrigen Bädern zur galvanischen Abscheidung von Zinn als Glanzbildner zugegeben werden. Die US-PS 2,525,942 betrifft die Verwendung von Alkansulfonsäurederivaten in Lösung zur Metallabscheidung. In der US-PS 4,582,576 wird ein Verfahren beschrieben, das aus alkansulfonsäurehaltigen Bädern glänzende Zinn- Zinn/Bleischichten abscheidet. Die dort beschriebenen wäßrigen, sauren Lösungen enthalten Metallsalze, freie Alkan- oder Alkanolsulfonsäure, Netzmittel, einen kurzkettigen aliphatischen Aldehyd, einen aromatischen Aldehyd, gegebenenfalls ein aromatisches Keton und eine ungesättigte, kurzkettige Carbonsäure. Die dort beschriebenen Zusammensetzungen haben den Nachteil, daß sie nur eine schlechte Belastbarkeit im hohen Stromdichtebereich aufweisen.DE-PS 1 260 262 describes aldol condensation products which are added to aqueous baths for the electrodeposition of tin as brighteners. US Pat. No. 2,525,942 relates to the use of alkanesulfonic acid derivatives in solution for metal deposition. US Pat. No. 4,582,576 describes a process which deposits shiny tin-tin / lead layers from baths containing alkanesulfonic acid. The aqueous, acidic solutions described therein contain metal salts, free alkane or alkanol sulfonic acid, wetting agents, a short-chain aliphatic aldehyde, an aromatic aldehyde, optionally an aromatic ketone and an unsaturated, short-chain carboxylic acid. The compositions described there have the disadvantage that they have only poor resilience in the high current density range.
Die der Erfindung zugrunde liegende Aufgabe besteht darin, wäßrige, saure Lösungen bereitzustellen, die eine bessere Belastbarkeit im hohen Stromdichtebereich aufweisen und eine gleichmäßige Glanzstreuung über den gesamten Stromdichtebereich ermöglichen.The object on which the invention is based is to provide aqueous, acidic solutions which have a better load-bearing capacity in the high current density range and enable uniform gloss scattering over the entire current density range.
Es wurde nun gefunden, daß diese Aufgaben gelöst werden durch eine wäßrige, saure Lösung für die elektrolytische Abscheidung von Zinn und/oder Blei/Zinnlegierungen, enthaltend ein Gemisch aus Zinn- und/oder Bleisalzen einer Alkansulfonsäure, freier Alkansulfonsäure, wobei die Alkylgruppe der Alkansulfonsäure aus 1 bis 5°C-Atomen besteht, nicht ionogenem Netzmittel und gegebenenfalls aromatischen kurzkettigen Aldehyden und/oder gegebenenfalls aromatischen Ketonen und/oder gegebenenfalls kurzkettigen ungesättigten Carbonsäuren, dadurch gekennzeichnet, daß als weiterer Glanzbildner ein Gemisch aus einem Reaktionsprodukt aus Acetaldehyd und/oder seinen Aldolkondensationsprodukten mit Ammoniak und/oder acyclischen Ketonen und/ oder aliphatischen Aminen, Amiden, Aminosäuren und/oder Hydrazinverbindungen enthalten ist.It has now been found that these objects are achieved by an aqueous, acidic solution for the electrolytic deposition of tin and / or lead / tin alloys, containing a mixture of tin and / or lead salts of an alkanesulfonic acid, free alkanesulfonic acid, the alkyl group of the alkanesulfonic acid consists of 1 to 5 ° C atoms, non-ionic wetting agent and optionally aromatic short-chain aldehydes and / or optionally aromatic ketones and / or optionally short-chain unsaturated carboxylic acids, characterized in that a mixture of a reaction product of acetaldehyde and / or its as a further brightener Aldol condensation products containing ammonia and / or acyclic ketones and / or aliphatic amines, amides, amino acids and / or hydrazine compounds.
Als Netzmittel wird bevorzugt ein nicht-ionogenes Netzmittel des Alkylarylpolyglykolethertyps gewählt. Wird als Glanzbildner ein Gemisch aus einem Reaktionsprodukt aus Acetaldehyd und/oder seinen Aldolkondensationsprodukten mit acyclischen Ketonen gewählt, so enthält das aliphatische Keton vorzugsweise 10 C-Atome im Molekül. In bevorzugter Weise werden im Gemisch gegebenenfalls Naphthaldehyd, Chloracetophenon oder Benzalaceton, Formaldehyd oder Acetaldehyd sowie als ungesättigte Carbonsäure Methacrylsäure oder Methylmethacrylsäure zugesetzt.A non-ionic wetting agent of the alkylaryl polyglycol ether type is preferably selected as the wetting agent. If a mixture of a reaction product of acetaldehyde and / or its aldol condensation products with acyclic ketones is chosen as the brightening agent, the aliphatic ketone preferably contains 10 carbon atoms in the molecule. Naphthaldehyde, chloroacetophenone or benzalacetone, formaldehyde or acetaldehyde and, as unsaturated carboxylic acid, methacrylic acid or methyl methacrylic acid are preferably added to the mixture in a preferred manner.
Die erfindungsgemäßen wäßrigen, sauren Lösungen enthalten vorzugsweise 5 bis 25 Gew.-% des oder der entsprechenden Metallsalze, 6 bis 20 Gew.-% der Alkansulfonsäure, 0,1 bis 5 Gew.-% nicht-ionogenen Netzmittels, 0,1 bis 5 Gew.-% des Aldolkondensationsprodukts, gegebenen falls 0,1 bis 3 % des aromatischen Aldehyds, gegebenenfalls 0,01 bis 1,0 Gew.-% des aromatischen Ketons, gegebenenfalls 0,01 bis 1,0 Gew.-% des kurzkettigen aliphatischen Aldehyds, sowie gegebenenfalls 0,01 bis 1 % der ungesättigten Carbonsäure. Die Angaben beziehen sich auf Mischungen, die auf 1 Liter fertige Lösung eingestellt werden.The aqueous, acidic solutions according to the invention preferably contain 5 to 25% by weight of the corresponding metal salt or salts, 6 to 20% by weight of the alkanesulfonic acid, 0.1 to 5% by weight of non-ionic wetting agent, 0.1 to 5 % By weight of the aldol condensation product if 0.1 to 3% of the aromatic aldehyde, optionally 0.01 to 1.0% by weight of the aromatic ketone, optionally 0.01 to 1.0% by weight of the short-chain aliphatic aldehyde, and optionally 0.01 to 1% of the unsaturated carboxylic acid. The information relates to mixtures that are adjusted to 1 liter of finished solution.
In einem Vergleich wurde eine Lösung gemäß Beispiel 1 der US-PS 4,582,576 nachgestellt. Dabei zeigte sich, daß erst nach Zugabe von etwa 10 ml/L des erfindungsgemäß verwendeten Aldolkondensationsproduktes, bekannt aus der DE-PS 1 260 262, brauchbare Ergebnisse hinsichtlich der Glanzbildung im hohen Stromdichtebereich zu verzeichnen waren.In a comparison, a solution according to Example 1 of US Pat. No. 4,582,576 was simulated. It was found that useful results in terms of gloss formation in the high current density range were only obtained after adding about 10 ml / L of the aldol condensation product according to the invention, known from DE-PS 1 260 262.
Die Verwendung von Aldolkondensationsprodukten gemäß der DE-PS 1 260 262 in einem Verfahren zur elektrolytischen Abscheidung von Zinn und/oder Blei/Zinnlegierungen führt überraschenderweise zu einer verbesserten galvanischen Abscheidung im hohen Stromdichtebereich, und gleichzeitig wird eine gleichmäßige Glanzstreuung im niedrigen Stromdichtebereich erzielt.The use of aldol condensation products according to DE-PS 1 260 262 in a process for the electrolytic deposition of tin and / or lead / tin alloys surprisingly leads to improved galvanic deposition in the high current density range, and at the same time uniform gloss scattering is achieved in the low current density range.
Die Erfindung wird anhand der nachfolgenden Beispiele näher erläutert.The invention is illustrated by the following examples.
Verfahrensparameter: Die Brauchbarkeit des Elektrolyten wurde zur Zinn- und/oder Blei/Zinn-Abscheidung in einer Hull-Zelle nach DIN 50 957 geprüft. Temperatur: 20 - 25°C, Expositionszeit: 5 Minuten mit mechanischer Rührbewegung, Anoden Zinn bzw. Blei-Zinn analog der Zusammensetzung des Niederschlags. Kathodenmaterial Stahlblech, Zellstrom 2, 3 oder 4 Ampere pro Zelle.Process parameters: The usability of the electrolyte was tested for tin and / or lead / tin deposition in a Hull cell in accordance with DIN 50 957. Temperature: 20 - 25 ° C, exposure time: 5 minutes with mechanical stirring, anode tin or lead-tin analogous to the composition of the precipitation. Sheet steel cathode material, cell current 2, 3 or 4 amps per cell.
20 g/l Zinn-(II) als Zinnmethansulfonat
70 g/l Methansulfonsäure
5 g/l Arkopal N-150 (Nonylphenolpolyglykolether mit 10 Mol ÄO)
10 g/l Aldolkondensationsprodukt nach DPA 1 260 262
1 g/l Methanal 40 Vol.-%20 g / l tin (II) as tin methanesulfonate
70 g / l methanesulfonic acid
5 g / l Arkopal N-150 (nonylphenol polyglycol ether with 10 mol ÄO)
10 g / l aldol condensation product according to DPA 1 260 262
1 g / l methanal 40 vol.%
25 g/l Zinn-(II) als Zinnmethansulfonat
2,5 g/l Blei-(II) als Bleimethansulfonat
100 g/l Methansulfonsäure
10 g/l Sapogenat T 130 (Tributylphenolpolyglykolether mit 13 Mol ÄO)
2 g/l 1-Naphthaldehyd
2 g/l Methacrylsäure
2 ml/l Aldolkondensationsprodukt25 g / l tin (II) as tin methanesulfonate
2.5 g / l lead (II) as lead methanesulfonate
100 g / l methanesulfonic acid
10 g / l Sapogenat T 130 (tributylphenol polyglycol ether with 13 mol ÄO)
2 g / l 1-naphthaldehyde
2 g / l methacrylic acid
2 ml / l aldol condensation product
18 g/l Zinn-(II) als Zinnmethansulfonat
2 g/l Blei-(II) als Bleimethansulfonat
50 g/l Methansulfonsäure
14 g/l Lutensol AP 10 (Nonylphenolpolyglykolether mit 10 Mol ÄO)
10 g/l Aldolkondensationsprodukt nach DPA 1 260 262
0,04g/l Benzalaceton
0,8 g/l Naphthaldehyd
0,8 g/l Methanal 40 %
1,6 g/l Methacrylsäure18 g / l tin (II) as tin methanesulfonate
2 g / l lead (II) as lead methanesulfonate
50 g / l methanesulfonic acid
14 g / l Lutensol AP 10 (nonylphenol polyglycol ether with 10 mol ÄO)
10 g / l aldol condensation product according to DPA 1 260 262
0.04 g / l benzal acetone
0.8 g / l naphthaldehyde
0.8 g / l methanal 40%
1.6 g / l methacrylic acid
12 g/l Zinn-(II) als Zinnmethansulfonat
8 g/l Blei-(II) als Bleimethansulfonat
150 g/l Methansulfonsäure
5 g/l Arkopal N-150 (Nonylphenolpolyglykolether mit 15 Mol ÄO)
6 g/l Aldolkondensationsprodukt nach DPA 1 260 262
0,8 g/l Naphthaldehyd
4 ml/l Methanal 40 Vol.-%12 g / l tin (II) as tin methanesulfonate
8 g / l lead (II) as lead methanesulfonate
150 g / l methanesulfonic acid
5 g / l Arkopal N-150 (nonylphenol polyglycol ether with 15 mol ÄO)
6 g / l aldol condensation product according to DPA 1 260 262
0.8 g / l naphthaldehyde
4 ml / l methanal 40 vol.%
Die Beispiele 1 bis 4 gewährleisten jeweils eine sehr gute galvanische Abscheidung im hohen Stromdichtebereich und gewährleisten gleichzeitig eine gleichmäßige Glanzstreuung im niedrigen Stromdichtebereich.Examples 1 to 4 each ensure very good galvanic deposition in the high current density range and at the same time ensure uniform gloss scattering in the low current density range.
20 g/l Zinn-(II) als Zinnmethansulfonat
100 g/l Methansulfonsäure
g/l Lutensol AP 10 (Nonylphenolpolyglykolether mit 10 Mol ÄO)
0,2 g/l Benzalaceton
1 g/l Methylmethacrylat20 g / l tin (II) as tin methanesulfonate
100 g / l methanesulfonic acid
g / l Lutensol AP 10 (nonylphenol polyglycol ether with 10 mol AO)
0.2 g / l benzal acetone
1 g / l methyl methacrylate
Bei der Zusammensetzung des Beispiels 1 der US-Patentschrift wurde bei 2 Ampere Zellenstrom ein gleichmäßiger Glanz nur im Bereich von 1 - 8 Ampere/dm² erreicht. Oberhalb 8 A/dm² traten amorphe Anbrennungen auf. Im niedrigen Stromdichtebereich < 1 A/dm² war die Abscheidung milchig matt.In the composition of Example 1 of the US patent, a uniform gloss was only achieved in the range of 1-8 amperes / dm 2 at 2 ampere cell current. Amorphous burns occurred above 8 A / dm². In the low current density range <1 A / dm², the deposition was milky matt.
Nach Zugabe von 10 ml/l des erfindungsgemäßen Zusatzes war das Blech von 0,2 bis 10 A/dm² gleichmäßig glänzend.After adding 10 ml / l of the additive according to the invention, the sheet was uniformly shiny from 0.2 to 10 A / dm 2.
Bei einem Zellenstrom von 3 A konnte die Belastbarkeit im hohen Stromdichtebereich sogar auf 20 A/dm² erhöht werden.With a cell current of 3 A, the load capacity in the high current density range could even be increased to 20 A / dm².
Claims (6)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE3902042A DE3902042A1 (en) | 1989-01-25 | 1989-01-25 | AQUEOUS, ACID SOLUTIONS FOR THE ELECTROLYTIC DEPOSITION OF TIN AND / OR LEAD / TIN ALLOYS |
DE3902042 | 1989-01-25 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0379948A2 true EP0379948A2 (en) | 1990-08-01 |
EP0379948A3 EP0379948A3 (en) | 1991-07-31 |
EP0379948B1 EP0379948B1 (en) | 1994-03-09 |
Family
ID=6372697
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP90100870A Expired - Lifetime EP0379948B1 (en) | 1989-01-25 | 1990-01-17 | Aqueous acid solutions for the electrodeposition of tin and/or lead/tin alloys |
Country Status (5)
Country | Link |
---|---|
US (1) | US5021130A (en) |
EP (1) | EP0379948B1 (en) |
JP (1) | JP3096465B2 (en) |
DD (1) | DD291785A5 (en) |
DE (2) | DE3902042A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2004007809A2 (en) * | 2002-07-13 | 2004-01-22 | Dana Corporation | Plain bearing having an overlay alloy layer |
EP1705267A1 (en) * | 2005-03-24 | 2006-09-27 | Dowa Mining Co., Ltd | Tin-plated product and method for producing same |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5651873A (en) * | 1994-06-30 | 1997-07-29 | Mitsubishi Materials Corporation | Electroplating solution for forming Pb-Sn alloy bump electrodes on semiconductor wafer surface |
US5976712A (en) * | 1994-12-09 | 1999-11-02 | Federal-Mogul Wiesbaden Gmbh | Multilayer material for sliding elements and process and means for the production thereof |
DE19728777C2 (en) * | 1997-07-05 | 2001-03-15 | Federal Mogul Wiesbaden Gmbh | Layered composite material for plain bearings and method for manufacturing bearing shells |
US6267863B1 (en) | 1999-02-05 | 2001-07-31 | Lucent Technologies Inc. | Electroplating solution for electroplating lead and lead/tin alloys |
EP1260614B1 (en) * | 2001-05-24 | 2008-04-23 | Shipley Co. L.L.C. | Tin plating |
US6730209B2 (en) * | 2002-02-22 | 2004-05-04 | Lucent Technologies Inc. | Solder electroplating bath including brighteners having reduced volatility |
AU2003272790A1 (en) * | 2002-10-08 | 2004-05-04 | Honeywell International Inc. | Semiconductor packages, lead-containing solders and anodes and methods of removing alpha-emitters from materials |
CN110428939B (en) * | 2019-08-09 | 2020-06-30 | 常州大学 | Preparation method of high-conductivity graphene copper/aluminum composite wire |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1260262B (en) * | 1963-05-06 | 1968-02-01 | Friedr Blasberg G M B H | Galvanic bath and process for the electrolytic deposition of high-gloss tin coatings |
US4132610A (en) * | 1976-05-18 | 1979-01-02 | Hyogo Prefectural Government | Method of bright electroplating of tin-lead alloy |
US4582576A (en) * | 1985-03-26 | 1986-04-15 | Mcgean-Rohco, Inc. | Plating bath and method for electroplating tin and/or lead |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2525942A (en) * | 1945-06-29 | 1950-10-17 | Standard Oil Co | Electrodepositing bath and process |
-
1989
- 1989-01-25 DE DE3902042A patent/DE3902042A1/en active Granted
-
1990
- 1990-01-17 DE DE90100870T patent/DE59004841D1/en not_active Expired - Lifetime
- 1990-01-17 EP EP90100870A patent/EP0379948B1/en not_active Expired - Lifetime
- 1990-01-23 US US07/469,066 patent/US5021130A/en not_active Expired - Lifetime
- 1990-01-24 JP JP02014730A patent/JP3096465B2/en not_active Expired - Lifetime
- 1990-01-24 DD DD90337314A patent/DD291785A5/en not_active IP Right Cessation
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1260262B (en) * | 1963-05-06 | 1968-02-01 | Friedr Blasberg G M B H | Galvanic bath and process for the electrolytic deposition of high-gloss tin coatings |
US4132610A (en) * | 1976-05-18 | 1979-01-02 | Hyogo Prefectural Government | Method of bright electroplating of tin-lead alloy |
US4582576A (en) * | 1985-03-26 | 1986-04-15 | Mcgean-Rohco, Inc. | Plating bath and method for electroplating tin and/or lead |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2004007809A2 (en) * | 2002-07-13 | 2004-01-22 | Dana Corporation | Plain bearing having an overlay alloy layer |
WO2004007809A3 (en) * | 2002-07-13 | 2004-04-15 | Dana Corp | Plain bearing having an overlay alloy layer |
US7174637B2 (en) | 2002-07-13 | 2007-02-13 | Dana Corporation | Bearings |
US7455458B2 (en) | 2002-07-13 | 2008-11-25 | Mahle Engine Systems Ltd. | Bearings |
EP1705267A1 (en) * | 2005-03-24 | 2006-09-27 | Dowa Mining Co., Ltd | Tin-plated product and method for producing same |
Also Published As
Publication number | Publication date |
---|---|
EP0379948B1 (en) | 1994-03-09 |
DE3902042C2 (en) | 1991-05-02 |
EP0379948A3 (en) | 1991-07-31 |
DD291785A5 (en) | 1991-07-11 |
JP3096465B2 (en) | 2000-10-10 |
DE3902042A1 (en) | 1990-07-26 |
DE59004841D1 (en) | 1994-04-14 |
JPH02232389A (en) | 1990-09-14 |
US5021130A (en) | 1991-06-04 |
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