PL99112B1 - BATH FOR THE GALVANIC METHOD OF GOLDEN ALLOYS WITH ARSEN - Google Patents
BATH FOR THE GALVANIC METHOD OF GOLDEN ALLOYS WITH ARSEN Download PDFInfo
- Publication number
- PL99112B1 PL99112B1 PL18153475A PL18153475A PL99112B1 PL 99112 B1 PL99112 B1 PL 99112B1 PL 18153475 A PL18153475 A PL 18153475A PL 18153475 A PL18153475 A PL 18153475A PL 99112 B1 PL99112 B1 PL 99112B1
- Authority
- PL
- Poland
- Prior art keywords
- bath
- arsenic
- alloys
- arsen
- golden
- Prior art date
Links
- RQNWIZPPADIBDY-UHFFFAOYSA-N arsenic atom Chemical compound [As] RQNWIZPPADIBDY-UHFFFAOYSA-N 0.000 title claims description 9
- 238000000034 method Methods 0.000 title description 2
- 229910045601 alloy Inorganic materials 0.000 title 1
- 239000000956 alloy Substances 0.000 title 1
- 229910052785 arsenic Inorganic materials 0.000 claims description 8
- 229920000388 Polyphosphate Polymers 0.000 claims description 5
- 239000000203 mixture Substances 0.000 claims description 5
- 239000001205 polyphosphate Substances 0.000 claims description 5
- 235000011176 polyphosphates Nutrition 0.000 claims description 5
- 239000011591 potassium Substances 0.000 claims description 5
- 229910052700 potassium Inorganic materials 0.000 claims description 5
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims description 4
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 claims description 4
- 239000011734 sodium Substances 0.000 claims description 4
- 229910052708 sodium Inorganic materials 0.000 claims description 4
- 150000003464 sulfur compounds Chemical class 0.000 claims description 3
- 229910001020 Au alloy Inorganic materials 0.000 claims description 2
- 150000001261 hydroxy acids Chemical class 0.000 claims description 2
- XAEFZNCEHLXOMS-UHFFFAOYSA-M potassium benzoate Chemical compound [K+].[O-]C(=O)C1=CC=CC=C1 XAEFZNCEHLXOMS-UHFFFAOYSA-M 0.000 claims description 2
- 230000001603 reducing effect Effects 0.000 claims description 2
- 239000007864 aqueous solution Substances 0.000 claims 1
- LULLIKNODDLMDQ-UHFFFAOYSA-N arsenic(3+) Chemical compound [As+3] LULLIKNODDLMDQ-UHFFFAOYSA-N 0.000 claims 1
- 150000001875 compounds Chemical class 0.000 claims 1
- 239000003353 gold alloy Substances 0.000 claims 1
- 238000000576 coating method Methods 0.000 description 9
- 239000011248 coating agent Substances 0.000 description 5
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 5
- 239000010931 gold Substances 0.000 description 5
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 4
- 229910052737 gold Inorganic materials 0.000 description 4
- 229960003975 potassium Drugs 0.000 description 4
- 229910000640 Fe alloy Inorganic materials 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- LSNNMFCWUKXFEE-UHFFFAOYSA-N Sulfurous acid Chemical class OS(O)=O LSNNMFCWUKXFEE-UHFFFAOYSA-N 0.000 description 2
- 238000013019 agitation Methods 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 229910000967 As alloy Inorganic materials 0.000 description 1
- 229910000531 Co alloy Inorganic materials 0.000 description 1
- 241001460678 Napo <wasp> Species 0.000 description 1
- 229910000990 Ni alloy Inorganic materials 0.000 description 1
- 239000004133 Sodium thiosulphate Substances 0.000 description 1
- 229910017052 cobalt Inorganic materials 0.000 description 1
- 239000010941 cobalt Substances 0.000 description 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
- 229930188331 cyanolide Natural products 0.000 description 1
- 239000012153 distilled water Substances 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 150000007524 organic acids Chemical class 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000001508 potassium citrate Substances 0.000 description 1
- 229960002635 potassium citrate Drugs 0.000 description 1
- QEEAPRPFLLJWCF-UHFFFAOYSA-K potassium citrate (anhydrous) Chemical compound [K+].[K+].[K+].[O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O QEEAPRPFLLJWCF-UHFFFAOYSA-K 0.000 description 1
- 235000011082 potassium citrates Nutrition 0.000 description 1
- -1 potassium hydroxy acid salt Chemical class 0.000 description 1
- AQMNWCRSESPIJM-UHFFFAOYSA-M sodium metaphosphate Chemical compound [Na+].[O-]P(=O)=O AQMNWCRSESPIJM-UHFFFAOYSA-M 0.000 description 1
- 235000019983 sodium metaphosphate Nutrition 0.000 description 1
- AKHNMLFCWUSKQB-UHFFFAOYSA-L sodium thiosulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=S AKHNMLFCWUSKQB-UHFFFAOYSA-L 0.000 description 1
- 235000019345 sodium thiosulphate Nutrition 0.000 description 1
- RTLMFXCEYQGKRK-UHFFFAOYSA-N sodium;gold(3+);tetracyanide Chemical compound [Na+].[Au+3].N#[C-].N#[C-].N#[C-].N#[C-] RTLMFXCEYQGKRK-UHFFFAOYSA-N 0.000 description 1
- 150000004764 thiosulfuric acid derivatives Chemical class 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Electroplating And Plating Baths Therefor (AREA)
Description
Przedmiotem wynalazku jest kapiel do wspól¬ osadzania stopów zlota z arsenem na wyrobach przemyslu elektronicznego, stanowiacych skladowe- czesci ukladów elektronowych.Warunki eksploatacyjne powlok zlotych sta¬ wiaja coraz wieksze wymagania zwiazane z szczel¬ noscia, lutownoscia oraz wlasnosciami elektryczny¬ mi.Znana kapiel stosowana do tego celu z polskie¬ go opisu patentowego nr 84 697 oparta jest na ba¬ zie mieszaniny polifosforanów, w której naklada sie powloki ze zlota w czystosci .99,99% na ele¬ menty ze stopów zelaza z niklem i kobaltem.Z francuskiego opisu patentowego nr 1.508.895 znana jest kapiel oparta na cyjanozlocinie z dodat¬ kiem kwasu organicznego oraz 0,12—10 g/l arsenu na III stopniu utleniania. Obie te kapiele nie za¬ pewniaja jednak w sposób kompleksowy warun¬ ków wynikajacych z eksploatacji elementów w ukladach elektronicznych.Celem wynalazku jest kapiel pozwalajaca na la¬ czne usuniecie wymienionych niedomagan.Postawiony cel zostal osiagniety, gdyz okazalo sie, ze jezeli doda sie do roztworu zawierajacego cyjanozlocin potasowy i/lub sodowy mieszanine dwóch polifosforanów zwiazanych z soba w od¬ powiednim stosunku, sól potasowa hydroksykwasu oraz niewielka ilosc zwiazku siarki o wlasciwos¬ ciach redukujacych, na przyklad siarczyny, tiosiar¬ czany czy pirosiarezany oraz arsen, to powloki o- 2 trzymane z tej kapieli usuwaja calkowicie wady powlok wytwarzanych w dotychczas znanych ka¬ pielach. Z kapieli wedlug wynalazku otrzymuje sie powloki ze zlota drobnokrystalicznego o dowolnej grubosci, przy czym, jak to wykazaly badania, za¬ sadniczy wplyw na uzyskanie drobnokrystalicznej powloki ma wspólobecnosc w kapieli mieszaniny polifosforanów i arsenu. Otrzymywane powloki od¬ znaczajac sie duza szczelnoscia, bardzo mala opor- io noscia przejscia i calkowitym brakiem naprezen wlasnych.Kapiel wedlug wynalazku sklada sie z roztworu zawierajacego 3 do 15 g/l zlota w postaci cyjano- zlocinu potasowego i/lub sodowego, 20 do 100 g/l soli potasowej hydroksykwasu, 1 do 50 g/l miesza¬ niny dwóch polifosforanów zmieszanych z soba w stosunku od 1:1 do 1:8 o wzorze ogólnym [NaP08]x, w którym x jest liczba calkowita zawarta w gra¬ nicach a do 6, 10 do 500 mgA arsenu i 1 dc 5 g/l zwiazku siarki na przyklad siarczynów, triosiar- czanów, pirosiarczanów.Kapiel wedlug wynalazku pracuje przy pH w granicach 6,5 do 7,5 oraz przy gestosci pradu w granicach 0,05 do 1,0 A/dm2 w temperaturze pod- wyzszonej w zakresie 50 do 70°C przy mechanicz¬ nym mieszaniu.Przyklad. Przygotowano kapiel zawierajaca g/l cyjanozlocinu potasowego, 2 g/1 metacztero- fosforanu sodowego, 10 g/l soli Maddrella (NaPOs), 50 g/l cytrynianu potasowego, 2 g/l tiosiarczanu 9911299 112 3 4 sodowego, 100 mg/l arsenu, przy ustawieniu pH w granicach 6,5 do 7,5. Przygotowane do zloce¬ nia czesci, wykonane ze stopów zelaza z niklem i kobaltem odtluszczono, oplukano i przeniesiono na przeciag 15 sekund do konwencjonalnej kapieli trawiacej i po oplukaniu w wodzie biezacej i na¬ stepnie destylowanej wstawiono do przygotowanej kapieli. Proces nakladania powloki prowadzono w kapieli ogrzanej do temperatury 55°C, przy gestosci pradu 0,4 A/dm2 przez jedna godzine przy ciaglym mieszaniu mechanicznym. Uzyskano powloke o gru¬ bosci 14 mikrometrów, zawierajaca 0,1% arsenu.Nalozona powloka wykazala calkowita szczelnosc, bardzo dobra lutownosc i opornosc przejscia rzedu 1 m. PLThe subject of the invention is a bath for the bonding of gold and arsenic alloys on products of the electronics industry, which are components of electronic systems. The operating conditions of gold coatings make more and more requirements related to tightness, solderability and electrical properties. for this purpose, Polish Patent No. 84,697 is based on a mixture of polyphosphates in which a 99.99% pure gold coating is applied to iron, nickel and cobalt alloys. Patent No. 1,508,895, a bath based on cyanozlod with the addition of organic acid and 0.12-10 g / l of arsenic in the 3rd oxidation stage is known. Both these baths, however, do not comprehensively ensure the conditions resulting from the operation of components in electronic systems. The purpose of the invention is a bath that allows for the total removal of the above-mentioned problems. The goal was achieved, because it turned out that if it was added to the solution containing potassium cyanolide and / or sodium, a mixture of two polyphosphates bound together in an appropriate ratio, a potassium salt of a hydroxy acid and a small amount of a sulfur compound with reducing properties, for example sulphites, thiosulphates or pyrosulfates and arsenic, are kept from this bath completely remove the drawbacks of coatings produced in the hitherto known baths. According to the invention, coatings of fine crystalline gold of any thickness are obtained from the baths, and research has shown that the presence of a mixture of polyphosphates and arsenic in the bath has a significant influence on obtaining a fine crystalline coating. The obtained coatings are characterized by high tightness, very low transition resistance and complete absence of internal stress. The bath according to the invention consists of a solution containing 3 to 15 g / l of gold in the form of potassium and / or sodium cyanide gold, 20 to 100 g / l of potassium hydroxy acid salt, 1 to 50 g / l of a mixture of two polyphosphates mixed with each other in a ratio of 1: 1 to 1: 8 of the general formula [NaP08] x, where x is the integer contained in the gram up to 6, 10 to 500 mgA of arsenic and 1 dc 5 g / l of a sulfur compound, for example sulphites, triosulphates, metabisulphates. The bath according to the invention works at a pH in the range of 6.5 to 7.5 and with a current density in the range 0.05 to 1.0 amp / dm2 at a temperature elevated in the range of 50 to 70 ° C. with mechanical agitation. A bath was prepared containing g / l potassium cyanozlocin, 2 g / l sodium metachytherophosphate, 10 g / l maddrell's salt (NaPOs), 50 g / l potassium citrate, 2 g / l sodium thiosulphate 9911299 112 3 4 sodium, 100 mg / l arsenic with a pH setting of 6.5 to 7.5. The parts prepared for gilding, made of alloys of iron with nickel and cobalt, were degreased, rinsed and transferred for 15 seconds to a conventional etching bath and, after rinsing in running and carefully distilled water, placed in the prepared bath. The coating application process was carried out in a bath heated to a temperature of 55 ° C, with a current density of 0.4 A / dm2 for one hour with continuous mechanical agitation. The result was a 14 micrometer thick coating containing 0.1% arsenic. The applied coating showed complete tightness, very good solderability and a 1 meter transition resistance. PL
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PL18153475A PL99112B1 (en) | 1975-06-25 | 1975-06-25 | BATH FOR THE GALVANIC METHOD OF GOLDEN ALLOYS WITH ARSEN |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PL18153475A PL99112B1 (en) | 1975-06-25 | 1975-06-25 | BATH FOR THE GALVANIC METHOD OF GOLDEN ALLOYS WITH ARSEN |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| PL99112B1 true PL99112B1 (en) | 1978-06-30 |
Family
ID=19972690
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PL18153475A PL99112B1 (en) | 1975-06-25 | 1975-06-25 | BATH FOR THE GALVANIC METHOD OF GOLDEN ALLOYS WITH ARSEN |
Country Status (1)
| Country | Link |
|---|---|
| PL (1) | PL99112B1 (en) |
-
1975
- 1975-06-25 PL PL18153475A patent/PL99112B1/en unknown
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