GB828434A - Improvements in or relating to electric capacitors - Google Patents
Improvements in or relating to electric capacitorsInfo
- Publication number
- GB828434A GB828434A GB904255A GB904255A GB828434A GB 828434 A GB828434 A GB 828434A GB 904255 A GB904255 A GB 904255A GB 904255 A GB904255 A GB 904255A GB 828434 A GB828434 A GB 828434A
- Authority
- GB
- United Kingdom
- Prior art keywords
- electrode
- deposited
- strips
- film
- anodized
- 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
- 239000003990 capacitor Substances 0.000 title abstract 4
- 229910052751 metal Inorganic materials 0.000 abstract 5
- 239000002184 metal Substances 0.000 abstract 5
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 abstract 3
- 239000004411 aluminium Substances 0.000 abstract 3
- 229910052782 aluminium Inorganic materials 0.000 abstract 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 abstract 3
- 238000000034 method Methods 0.000 abstract 2
- 238000012986 modification Methods 0.000 abstract 2
- 230000004048 modification Effects 0.000 abstract 2
- 229910052759 nickel Inorganic materials 0.000 abstract 2
- 238000007738 vacuum evaporation Methods 0.000 abstract 2
- 239000004793 Polystyrene Substances 0.000 abstract 1
- 230000001464 adherent effect Effects 0.000 abstract 1
- 239000010407 anodic oxide Substances 0.000 abstract 1
- 230000008021 deposition Effects 0.000 abstract 1
- 238000009713 electroplating Methods 0.000 abstract 1
- 230000000873 masking effect Effects 0.000 abstract 1
- 238000005498 polishing Methods 0.000 abstract 1
- 229920000139 polyethylene terephthalate Polymers 0.000 abstract 1
- 239000005020 polyethylene terephthalate Substances 0.000 abstract 1
- 229920002223 polystyrene Polymers 0.000 abstract 1
- 238000005507 spraying Methods 0.000 abstract 1
- 239000000126 substance Substances 0.000 abstract 1
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 abstract 1
- 238000004804 winding Methods 0.000 abstract 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G4/00—Fixed capacitors; Processes of their manufacture
- H01G4/32—Wound capacitors
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Fixed Capacitors And Capacitor Manufacturing Machines (AREA)
Abstract
828,434. Capacitors. BRITISH DIELECTRIC RESEARCH Ltd. March 28, 1956 [March 28, 1955; May 20, 1955], Nos. 9042/55 and 14640/55. Class 37. A capacitor comprises a winding of insulating film having' electrodes formed by an adherent metal layer separated from a second metal layer by an anodized oxide film. As shown, a film 1 of polystyrene or polyethyleneterephthalate carries, as one electrode, one or more metallized layers 2 which are anodized to form the dielectric 3 on which is deposited another metal layer 4 to act as second electrode. For higher voltages, Fig. 3, either or both electrodes may be divided into a plurality of sections 11, 12, 13 and 15, 16 to provide a number of series connected capacitors. Connections are made by spraying metal on to the ends of the roll formed by the overlapping edges of electrode sections 11, 13. An embodiment is described whereby the outer electrode has the larger number of sectioned strips. Selfhealing properties are improved by dividing each series element into a number of concentric parts which are externally connected in parallel. The first electrode 2 is 0.6Á thick aluminium deposited on the insulating film 1 by electroplating after vacuum evaporation. A sectioned electrode may be either deposited in strips or divided into sections by burning off narrow strips or by the process described in Specification 742,056. As a modification, the first electrode may be of nickel (deposited by the nickel carbonyl process) on which the aluminium film, the whole of which is later converted to oxide, is deposited. An anodic oxide layer is next formed. The second electrode is deposited 0.2Á thick by vacuum evaporation, temporary masking strips being employed if a divided electrode is required. A further modification avoids the deposition of anodizable metal by using an aluminium or tantalum foil lacquered on one side then reduced in thickness by electrolytic or chemical polishing before being anodized.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB904255A GB828434A (en) | 1955-03-28 | 1955-03-28 | Improvements in or relating to electric capacitors |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB904255A GB828434A (en) | 1955-03-28 | 1955-03-28 | Improvements in or relating to electric capacitors |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB828434A true GB828434A (en) | 1960-02-17 |
Family
ID=9864273
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB904255A Expired GB828434A (en) | 1955-03-28 | 1955-03-28 | Improvements in or relating to electric capacitors |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB828434A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3214657A (en) * | 1963-01-17 | 1965-10-26 | Du Pont | Solid self-healing capacitor |
| DE1239402B (en) * | 1961-08-24 | 1967-04-27 | Siemens Ag | Electric capacitor for low operating voltages |
| US4161766A (en) * | 1977-05-23 | 1979-07-17 | General Electric Company | Laminated capacitive touch-pad |
-
1955
- 1955-03-28 GB GB904255A patent/GB828434A/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1239402B (en) * | 1961-08-24 | 1967-04-27 | Siemens Ag | Electric capacitor for low operating voltages |
| US3214657A (en) * | 1963-01-17 | 1965-10-26 | Du Pont | Solid self-healing capacitor |
| US4161766A (en) * | 1977-05-23 | 1979-07-17 | General Electric Company | Laminated capacitive touch-pad |
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