GB2069240A - An electrical capacitor - Google Patents
An electrical capacitor Download PDFInfo
- Publication number
- GB2069240A GB2069240A GB8103383A GB8103383A GB2069240A GB 2069240 A GB2069240 A GB 2069240A GB 8103383 A GB8103383 A GB 8103383A GB 8103383 A GB8103383 A GB 8103383A GB 2069240 A GB2069240 A GB 2069240A
- Authority
- GB
- United Kingdom
- Prior art keywords
- dielectric body
- metal
- electrical capacitor
- centre region
- metal coating
- 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.)
- Withdrawn
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE
- H01G4/00—Fixed capacitors; Processes of their manufacture
- H01G4/002—Details
- H01G4/018—Dielectrics
- H01G4/06—Solid dielectrics
- H01G4/08—Inorganic dielectrics
- H01G4/12—Ceramic dielectrics
Abstract
An electrical capacitor comprises a ceramic disc shaped dielectric body (1) having a corrugated centre region (2) on which two metal coating layers (4,5) are formed, one on each side of the dielectric body (1), the coating layers being separated from each other by a metal-free bead-like edge (3) of the dielectric body (1). <IMAGE>
Description
SPECIFICATION
An electrical capacitor
The invention relates to an electrical capacitor comprising a ceramic, disc-shaped dielectric body with a metal coating layer on each of its two main faces, the two metal coating layers being separated from each other by a bead-like edge which is free of metal.
This type of capacitor is known for example from
German Gebrauchsmuster No. 78 12819 and from
German Gebrauchsmuster No. 78 31 224. In these known capacitors the ceramic dielectric body is flat however so that the value of the capacitance, which is directly proportional to the area of the metal layers of the coating which are opposite to each other, is limited in terms of relatively high values.
The invention seeks to provide a capacitor of the type stated at the outset which has a substantially higher capacitance value while the external dimensions are otherwise the same and the resistance to voltage is also the same.
According to the invention, there is provided an electrical capacitor comprising a ceramic, discshaped dielectric body with a metal coating layer on each of its two main faces, the two metal coating layers being separated from each other by a beadlike edge which is free of metal, wherein the dielectric body has a corrugated centre region.
The advantages achieved by the invention lie in manufacturing the capacitor simply and in the ability to achieve substantially higher capacitance values than is the case in known capacitors with the same resistance to voltage and the same dimensions.
The invention will now be described in greater detail by wayof example, with reference to the drawing, the single figure of which shows one embodiment of the invention in section.
The capacitor has a disc-shaped ceramic dielectric body 1 with a corrugated centre region 2, which increases the area of two metal coating layers 4 and 5which coverthetwo main surfaces ofthe dielectric body and which in turn are opposite each other. The two metal coating layers 4 and 5 are insulated electricially from each other by means of an encirculing, bead-like metal-free edge 3. In order to dissipate heat from the dielectric body 1 in improved manner, cooling coils in accordance with the type known from German Gebrauchsmutter No. 7812 819 may be fixed in the depressions of the corrugated centre region 2. It is also possible to weld a disc of sheet metal to the elevations of the corrugations and to pass a cooling liquid through the resultant cavities formed from the depressions in the corrugations.
1. An electrical capacitor comprising a ceramic, disc-shaped dielectric body with a metal coating layer on each of its two main faces, the two metal coating layers being separated from each other by a bead-like edge which is free of metal wherein the dielectric body has a currugated centre region.
2. An electrical capacitor according to Claim 1, wherein the corrugated centre region is rotationally symmetrical.
3. An electrical capacitor according to Claims 1 or 2 wherein the amplitude of the corrugated centre region is smaller than or at most equal to the width of the bead-like edge of the dielectric body.
4. An electrical capacitor according to any one of
Claims 1 to 3 wherein the corrugations of the corrugated centre region are rounded or angular.
5. An electrical capacitor according to any one of
Claims 1 to 4, wherein the wall thickness of the dielectric body is constant in the corrugated centre region.
6. An electrical capacitor substantially as described herein with reference to the drawing.
**WARNING** end of DESC field may overlap start of CLMS **.
Claims (6)
1. An electrical capacitor comprising a ceramic, disc-shaped dielectric body with a metal coating layer on each of its two main faces, the two metal coating layers being separated from each other by a bead-like edge which is free of metal wherein the dielectric body has a currugated centre region.
2. An electrical capacitor according to Claim 1, wherein the corrugated centre region is rotationally symmetrical.
3. An electrical capacitor according to Claims 1 or 2 wherein the amplitude of the corrugated centre region is smaller than or at most equal to the width of the bead-like edge of the dielectric body.
4. An electrical capacitor according to any one of
Claims 1 to 3 wherein the corrugations of the corrugated centre region are rounded or angular.
5. An electrical capacitor according to any one of
Claims 1 to 4, wherein the wall thickness of the dielectric body is constant in the corrugated centre region.
6. An electrical capacitor substantially as described herein with reference to the drawing.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19808003005 DE8003005U1 (en) | 1980-02-06 | 1980-02-06 | ELECTRIC CAPACITOR |
DE19803004282 DE3004282A1 (en) | 1980-02-06 | 1980-02-06 | Capacitor with corrugated dielectric - has corrugations on either side of dielectric centre-line, both sides metallised to reduce component size and has rotational symmetry |
Publications (1)
Publication Number | Publication Date |
---|---|
GB2069240A true GB2069240A (en) | 1981-08-19 |
Family
ID=25783573
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB8103383A Withdrawn GB2069240A (en) | 1980-02-06 | 1981-02-04 | An electrical capacitor |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB2069240A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2260024A (en) * | 1991-08-19 | 1993-03-31 | Kitagawa Ind Co Ltd | Electrical components and methods of manufacturing the same |
EP1616360A2 (en) * | 2003-03-05 | 2006-01-18 | William B. Duff, Jr. | Electrical charge storage device having enhanced power characteristics |
-
1981
- 1981-02-04 GB GB8103383A patent/GB2069240A/en not_active Withdrawn
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2260024A (en) * | 1991-08-19 | 1993-03-31 | Kitagawa Ind Co Ltd | Electrical components and methods of manufacturing the same |
US5391392A (en) * | 1991-08-19 | 1995-02-21 | Kitagawa Industries Co., Ltd. | Method for manufacturing electrical components |
GB2260024B (en) * | 1991-08-19 | 1995-12-06 | Kitagawa Ind Co Ltd | Electrical components and methods of manufacturing the same |
EP1616360A2 (en) * | 2003-03-05 | 2006-01-18 | William B. Duff, Jr. | Electrical charge storage device having enhanced power characteristics |
EP1616360A4 (en) * | 2003-03-05 | 2006-12-27 | William B Duff Jr | Electrical charge storage device having enhanced power characteristics |
US7289312B2 (en) | 2003-03-05 | 2007-10-30 | Duff Jr William B | Electrical charges storage device having enhanced power characteristics |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |