http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-840429-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_5c4ac640316f0b9aa95616a643acb91a |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C25D3-38 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C25D5-44 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C25D5-30 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C25D3-40 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C25D3-38 |
| filingDate | 1957-05-02-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1960-07-06-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-840429-A |
| titleOfInvention | Improvements in or relating to the electrodeposition of copper |
| abstract | 840,429. Electrodeposition of copper, especially on aluminium and its alloys. MINISTER OF NATIONAL DEFENCE OF HER MAJESTY'S CANADIAN GOVERNMENT. May 2, 1957 [May 10, 1956], No. 14049/57. Class 41. An aqueous copper electroplating bath of pH 5 to 6.5 comprises the ions bivalent copper; pyrophosphate, polyphosphate or a mixture thereof; oxalate or malonate; and ammonium, the radical of a tertiary amine having C 1-4 alkyl groups attached to the amino nitrogen atom, or a mixture of said amine and ammonium; the total condensed phosphate being less than that required fully to complex the copper and the ammonium or amine content being at least sufficient to complex the part of the copper not complexed with the condensed phosphate. The bath may also contain polymetaphosphates in up to three times the weight of the total condensed phosphate as above. Typically the bath contains per litre bivalent copper equivalent to 10 to 60 gms. cupric oxide (A) oxalate equivalent to 30 to 180 gms. crystalline oxalic acid (B) and pyrophosphate equivalent to 50 to 300 gms. ammonium pyrophosphate (C) the ratio A: B: C being 5: 3: 1. The bath may also contain 25 to 150 gms. triethylamine, half the weight of the ammonium pyrophosphate. In examples the bath contains per litre 20 gms. cupric oxide, 60 gms. oxalic acid crystals, and 100 gms. ammonium pyrophosphate together, 50 gms. of triethylamine alone or with 10 gms. of copper oxalate or copper pyrophosphate, 10 gms. of boric acid, or 0.2 gm. ammonium fluoride. The pyrophosphate may be replaced by tripolyphosphates or by 100 gms. of a 1 : 1 mixture of ammonium pyro- and hexameta-phosphates. Aluminium or its alloys may be cathodically plated, e.g. by barrel technique, with up to 0.2 mil. of copper after cleaning in a mildly alkaline cleaning bath, preferably followed by immersion in the plating bath before applying the plating current. A wire of aluminium or its alloys may be plated with copper by feeding it steadily through the alkaline degreasing bath, and thereafter wiping and rinsing it before passage through the plating bath. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-0030305-A1 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/RU-2509832-C2 |
| priorityDate | 1956-05-10-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 45.