GB895568A - Improvements in or relating to capacitors - Google Patents
Improvements in or relating to capacitorsInfo
- Publication number
- GB895568A GB895568A GB3638260A GB3638260A GB895568A GB 895568 A GB895568 A GB 895568A GB 3638260 A GB3638260 A GB 3638260A GB 3638260 A GB3638260 A GB 3638260A GB 895568 A GB895568 A GB 895568A
- Authority
- GB
- United Kingdom
- Prior art keywords
- electrode
- annulus
- disc
- orifice
- 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.)
- Expired
Links
- 239000003990 capacitor Substances 0.000 title abstract 7
- 239000000037 vitreous enamel Substances 0.000 abstract 5
- 239000011248 coating agent Substances 0.000 abstract 4
- 238000000576 coating method Methods 0.000 abstract 4
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 abstract 3
- 239000000919 ceramic Substances 0.000 abstract 3
- 239000004020 conductor Substances 0.000 abstract 3
- 239000000463 material Substances 0.000 abstract 2
- 239000002245 particle Substances 0.000 abstract 2
- 229910002113 barium titanate Inorganic materials 0.000 abstract 1
- JRPBQTZRNDNNOP-UHFFFAOYSA-N barium titanate Chemical compound [Ba+2].[Ba+2].[O-][Ti]([O-])([O-])[O-] JRPBQTZRNDNNOP-UHFFFAOYSA-N 0.000 abstract 1
- 239000011230 binding agent Substances 0.000 abstract 1
- 229910010293 ceramic material Inorganic materials 0.000 abstract 1
- 230000001419 dependent effect Effects 0.000 abstract 1
- 239000007772 electrode material Substances 0.000 abstract 1
- 239000002320 enamel (paints) Substances 0.000 abstract 1
- 230000017525 heat dissipation Effects 0.000 abstract 1
- 238000009413 insulation Methods 0.000 abstract 1
- 229910052751 metal Inorganic materials 0.000 abstract 1
- 239000002184 metal Substances 0.000 abstract 1
- 230000004048 modification Effects 0.000 abstract 1
- 238000012986 modification Methods 0.000 abstract 1
- 239000006223 plastic coating Substances 0.000 abstract 1
- 239000011347 resin Substances 0.000 abstract 1
- 229920005989 resin Polymers 0.000 abstract 1
- 229910000679 solder Inorganic materials 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
- H01G4/002—Details
- H01G4/005—Electrodes
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B1/00—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G2/00—Details of capacitors not covered by a single one of groups H01G4/00-H01G11/00
- H01G2/14—Protection against electric or thermal overload
-
- 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
- H01G4/002—Details
- H01G4/228—Terminals
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Manufacturing & Machinery (AREA)
- Parts Printed On Printed Circuit Boards (AREA)
- Non-Metallic Protective Coatings For Printed Circuits (AREA)
Abstract
895,568. Capacitors; voltage-dependent capacitors; printed circuits. TELEGRAPH CONDENSER CO. Ltd. (Sprague Electric Co.). Oct. 24, 1960, No. 36382/60. Class 37. A capacitor is constructed from a thin dielectric layer having a non-conductive low-permittivity coating on one face thereof, with an orifice within which conductive material bears on the dielectric layer, and a connecting electrode formed on the coating which is in control with the conductive material; the opposite face of the dielectric layer being provided with a further electrode which may be similarly constructed. A ceramic disc 10 which may be of barium titanate (Fig. 5) has a spot of conducting material deposited at the centre of one or both faces to form an electrode 12 whose contact area determines the required capacitance. The disc and electrode are covered with a vitreous enamel annulus 13 having a central orifice 14 extending inwardly to the electrode, and a large electrode 15 overlies a substantial area of the annulus and contacts the electrode 12. A mass of solder 16 overlies electrode 15 and secures a wire or tab 17 (Fig. 3) of cross-section sufficient to conduct away any heat developed in the capacitor. A similar electrode arrangement may be applied to the opposite face of the disc 10 with an electrode 12 of the same or of different size, or a plane electrode may be applied direct to the opposite face. The capacitor unit and its lead is covered with a hardenable resin for protection and insulation which cover may be wax impregnated after hardening. The electrode 12, annulus 13, and electrode 15 may be screened on to the disc 10 in succession, and the vitreous enamel of the annulus may be filled with, e.g., aluminium oxide. The binder material used for bonding the particles of the electrode material to the bases to which they are applied is desirably one in which the conducting particles do not float. In a modification (Fig. 6, not shown) the vitreous enamel annulus may be applied direct to the ceramic disc and a single electrode applied over the annulus and extending through the control orifice to the face of the disc. The lead wires and plastic coating may be omitted and the capacitor located in a button type mounting, which improves heat dissipation. The permittivity of the ceramic disc material is of at least one order of magnitude greater than that of the vitreous enamel. A capacitance constructed as above may be incorporated in a printed circuit (Figs. 7, 8, not shown) comprising a dielectric base layer which may be of ceramic material on which electrical components, e.g. terminals and resistors, may be mounted. A low permittivity, e.g. vitreous enamel coating is applied in two layers to the dielectric base to underlie the terminals and resistors, and a rectangular orifice is formed in the coating and is filled with a metal electrode contacting the dielectric layer, having an active area defined by the orifice. A conductive element overlying the enamel coating and the orifice therein connects the electrode to the printed circuit, and a corresponding electrode is applied to the opposite side of the dielectric base.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB3638260A GB895568A (en) | 1960-10-24 | 1960-10-24 | Improvements in or relating to capacitors |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB3638260A GB895568A (en) | 1960-10-24 | 1960-10-24 | Improvements in or relating to capacitors |
Publications (1)
Publication Number | Publication Date |
---|---|
GB895568A true GB895568A (en) | 1962-05-02 |
Family
ID=10387640
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB3638260A Expired GB895568A (en) | 1960-10-24 | 1960-10-24 | Improvements in or relating to capacitors |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB895568A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4038587A (en) * | 1975-08-21 | 1977-07-26 | Sprague Electric Company | Ceramic disc capacitor and method of making the same |
-
1960
- 1960-10-24 GB GB3638260A patent/GB895568A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4038587A (en) * | 1975-08-21 | 1977-07-26 | Sprague Electric Company | Ceramic disc capacitor and method of making the same |
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