GB1290532A - - Google Patents
Info
- Publication number
- GB1290532A GB1290532A GB1290532DA GB1290532A GB 1290532 A GB1290532 A GB 1290532A GB 1290532D A GB1290532D A GB 1290532DA GB 1290532 A GB1290532 A GB 1290532A
- Authority
- GB
- United Kingdom
- Prior art keywords
- layer
- composition
- bath
- temperature
- electrodeposited
- 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.)
- Expired
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D1/00—Electroforming
- C25D1/04—Wires; Strips; Foils
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F10/00—Thin magnetic films, e.g. of one-domain structure
- H01F10/06—Thin magnetic films, e.g. of one-domain structure characterised by the coupling or physical contact with connecting or interacting conductors
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Power Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Printing Plates And Materials Therefor (AREA)
Abstract
1290532 Magnetic structures STANDARD TELEPHONES & CABLES Ltd 5 Aug 1970 [5 Aug 1969] 39088/69 Heading H1H [Also in Division C7] An endless magnetic recording band for electrographic printing and/or display apparatus is produced by electrodepositing on a cylindrical mandrel coated with a conducting metal oxide, e.g. of Ti or Mo, a first pyrophosphate Cu layer, then a second non-ferrous magnetic layer e.g. of Co/Ni or Co. The first Cu layer may be electrodeposited from an air agitated bath of composition 75 g./l. hydrated Cu pyrophosphate (24 g./l. Cu), 250 g./l. (anhydrous) K 4 P 2 O 7 and 0À9 g./l. NH 3 , having a pH between 8À6 and 9 and temperature between 50‹ and 55‹ C., using a C.D. of 50 A.S.F. A second Co/Ni layer may be electrodeposited from a bath of composition 200 g./l. each of CoCl 2 and NiCl 2 and 40 g./l. H 3 BO 3 , having a PH between 4À8 and 5 and temperature between 50‹ and 70‹ C., using a CD of 100 A.S.F. Prior to plating the first layer, the coated mandrel may be plated with a Ni or Fe-Ni film, e.g. a Ni film from a bath of composition 225 g./l. Ni sulphamate, 30 g./l. boric acid and 15 g./l. MgCl 2 , having a pH between 2 and 4, at room temperature using a C.D. of 30 A.S.F.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3908869 | 1969-08-05 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1290532A true GB1290532A (en) | 1972-09-27 |
Family
ID=10407567
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1290532D Expired GB1290532A (en) | 1969-08-05 | 1969-08-05 |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB1290532A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0542061A1 (en) * | 1991-11-15 | 1993-05-19 | Rockwell International Corporation | Photoelectrochemical imaging system |
-
1969
- 1969-08-05 GB GB1290532D patent/GB1290532A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0542061A1 (en) * | 1991-11-15 | 1993-05-19 | Rockwell International Corporation | Photoelectrochemical imaging system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| 435 | Patent endorsed 'licences of right' on the date specified (sect. 35/1949) | ||
| PCNP | Patent ceased through non-payment of renewal fee |