DE975939C - Process for the production of capacitors which have a dielectric which consists of oxides of the covering metal grown on metal coverings - Google Patents
Process for the production of capacitors which have a dielectric which consists of oxides of the covering metal grown on metal coveringsInfo
- Publication number
- DE975939C DE975939C DES16237D DES0016237D DE975939C DE 975939 C DE975939 C DE 975939C DE S16237 D DES16237 D DE S16237D DE S0016237 D DES0016237 D DE S0016237D DE 975939 C DE975939 C DE 975939C
- Authority
- DE
- Germany
- Prior art keywords
- dielectric
- metal
- oxides
- capacitors
- grown
- 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
- 239000002184 metal Substances 0.000 title claims description 8
- 239000003990 capacitor Substances 0.000 title claims description 4
- 238000004519 manufacturing process Methods 0.000 title claims description 4
- 238000000034 method Methods 0.000 title description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 2
- 238000000576 coating method Methods 0.000 claims description 2
- 238000005260 corrosion Methods 0.000 claims description 2
- 230000007797 corrosion Effects 0.000 claims description 2
- 230000003068 static effect Effects 0.000 claims 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 239000003795 chemical substances by application Substances 0.000 description 3
- 239000011148 porous material Substances 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 239000012084 conversion product Substances 0.000 description 1
- 239000012024 dehydrating agents Substances 0.000 description 1
- 238000005868 electrolysis reaction Methods 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000010445 mica Substances 0.000 description 1
- 229910052618 mica group Inorganic materials 0.000 description 1
- 150000005846 sugar alcohols Polymers 0.000 description 1
- 238000010792 warming Methods 0.000 description 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
- H01G4/018—Dielectrics
- H01G4/06—Solid dielectrics
- H01G4/08—Inorganic dielectrics
- H01G4/10—Metal-oxide dielectrics
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Fixed Capacitors And Capacitor Manufacturing Machines (AREA)
Description
Es ist bekannt, als Dielektrikum auch für statische Kondensatoren nichtleitende Umsetzungsprodukte des oder der Belegungsmetalle, z. B. ein Ventilmetall, zu verwenden. Die Umsetzungsprodukte können chemisch oder elektrolytisch hergestellt werden. Als besonders vorteilhaft erweist sich die Elektrolyse, wie sie bei der Herstellung der dielektrischen Schichten von Elektrolytkondensatoren Anwendung findet.It is known that non-conductive conversion products of the covering metal (s), e.g. B. a Valve metal, to be used. The reaction products can be produced chemically or electrolytically will. Electrolysis, as used in the manufacture of the dielectric layers of electrolytic capacitors is used.
Bekanntlich enthalten insbesondere elektrolytisch hergestellte Sperrschichten Feuchtigkeit. Hierdurch werden die dielektrischen Eigenschaften der Oxydschicht verschlechtert. Es ist darum erforderlich, daß in den Poren und Kapillaren der dielektrischen Schicht eingelagerte Wasser vor der Aufbringung des Gegenbelages und unter Umständen auch vor der Einlagerung von Füllstoffen in die dielektrische Schicht zu entfernen. Das geschieht üblicherweise durch eine Ausheizung des Dielektrikums.It is known that electrolytically produced barrier layers in particular contain moisture. Through this the dielectric properties of the oxide layer are deteriorated. It is therefore necessary that water embedded in the pores and capillaries of the dielectric layer prior to application of the opposing layer and, under certain circumstances, also before the storage of fillers in the dielectric Remove layer. This is usually done by heating the dielectric.
Bei der Ausheizung der Oxydschichten wird zwar im wesentlichen das in den Poren eingelagerte Wasser entfernt. Es erfolgt jedoch dabei infolge der starken Erwärmung eine Reaktion mit dem Wasser, wobei Hydratschichten entstehen, die gegenüber der reinen Oxydschicht schlechtere dielektrische Werte besitzen.When the oxide layers are baked out, it is essentially that which is stored in the pores Water removed. However, there is a reaction with the as a result of the strong warming Water, with hydrate layers that are poorer than the pure oxide layer have dielectric values.
209 732/18209 732/18
Um diesen Nachteil zu vermeiden und die Oxydschichten völlig auszutrocknen, wird daher ein Verfahren zur Herstellung von Kondensatoren vorgeschlagen, die ein Dielektrikum aufweisen, das aus auf Metallbelegungen aufgewachsenen Oxyden des Belegungsmetalls besteht und eine Stärke in der Größenordnung der korrosionsfesten Überzüge besitzt, d. h. ungefähr 5 bis 10 μ stark ist, mit Ausnahme solcher, bei denen auf diese Schicht die Gegenbelegung festhaftend in einer solchen Stärke aufgebracht ist, daß bei Überlastung oder an Fehl-' stellen des Dielektrikums die Gegenbelegung zerstört bzw. nichtleitend gemacht wird. Erfindungsgemäß wird das Dielektrikum mit wasserentziehenden Mitteln, beispielsweise mit Alkohol, behandelt und gegebenenfalls einer das wasserentziehende Mittel entfernenden Nachbehandlung unterworfen. Als wasserentziehendes Mittel können z. B. ein- oder mehrwertige Alkohole verwendet werden. Man erhält dadurch eine vollständige Beseitigung von Wasserresten unter Vermeidung einer Hydratbildung. Gleichzeitig gewinnt man den Vorteil, mit Hilfe der wasserentziehenden Mittel weitere vorhandene Verunreinigungen aus der Oxydschicht gegebenenfalls herauslösen zu können, wodurch die dielektrischen Eigenschaften der Oxydschichten weiterhin verbessert werden. Man erhält in den erfindungsgemäß behandelten Oxydschichten dielektrische Schichten, deren Verlustwinkel in der Größenordnung hochwertigen Glimmers liegen.To avoid this disadvantage and the oxide layers to dry out completely, a method for the production of capacitors is therefore proposed, which have a dielectric composed of oxides grown on metal deposits Covering metal and has a thickness in the order of magnitude of the corrosion-resistant coatings, d. H. is about 5 to 10 μ thick, with the exception of those in which the opposing layer adheres firmly to such a thickness is applied that in the event of overloading or at faults in the dielectric, the opposite assignment is destroyed or is made non-conductive. According to the invention, the dielectric with dehydrating Agents, for example with alcohol, treated and optionally one of the dehydrating Subsequent treatment to remove agents. As a dehydrating agent such. B. a or polyhydric alcohols can be used. This gives a complete elimination of Residual water avoiding hydrate formation. At the same time you gain the advantage of having With the help of the dehydrating agents further existing impurities from the oxide layer to be able to dissolve out if necessary, whereby the dielectric properties of the oxide layers continue to be improved. Dielectric layers are obtained in the oxide layers treated according to the invention Layers whose loss angle is in the order of magnitude of high-quality mica.
Claims (1)
Deutsches Patent Nr. 898 479.Legacy Patents Considered:
German Patent No. 898 479.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DES16237D DE975939C (en) | 1940-07-11 | 1940-07-11 | Process for the production of capacitors which have a dielectric which consists of oxides of the covering metal grown on metal coverings |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DES16237D DE975939C (en) | 1940-07-11 | 1940-07-11 | Process for the production of capacitors which have a dielectric which consists of oxides of the covering metal grown on metal coverings |
Publications (1)
Publication Number | Publication Date |
---|---|
DE975939C true DE975939C (en) | 1962-12-13 |
Family
ID=7475112
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DES16237D Expired DE975939C (en) | 1940-07-11 | 1940-07-11 | Process for the production of capacitors which have a dielectric which consists of oxides of the covering metal grown on metal coverings |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE975939C (en) |
Citations (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE248857C (en) * | ||||
GB374806A (en) * | 1931-12-18 | 1932-06-16 | Vaw Ver Aluminium Werke Ag | Improvements in the production of oxide coatings on aluminium and its alloys |
GB385763A (en) * | 1931-12-31 | 1933-01-05 | Vaw Ver Aluminium Werke Ag | Improvements in and relating to the treatment of oxide coatings on aluminium and aluminium alloys |
GB388787A (en) * | 1930-09-25 | 1933-03-03 | Vaw Ver Aluminium Werke Ag | Improvements in and relating to the treatment of oxide coated aluminium and aluminium alloy surfaces |
US1935395A (en) * | 1927-08-29 | 1933-11-14 | Fansteel Prod Co Inc | Film formation on valve metals |
DE645206C (en) * | 1935-11-05 | 1937-05-24 | Ver Aluminium Werke Akt Ges | Process for the electrolytic oxidation of aluminum and aluminum alloys using alternating current |
DE653605C (en) * | 1937-11-27 | Telefunken Gmbh | Electric capacitor made of several layered unit fins made from aluminum sheets | |
DE657179C (en) * | 1935-10-29 | 1938-02-28 | Siemens & Halske Akt Ges | Process for the production of particularly puncture-resistant and low-loss oxide layers on aluminum and its alloys |
DE667529C (en) * | 1931-02-11 | 1938-11-14 | Alexander Fekete Dipl Ing Dr | Method for producing a massive electrical capacitor |
DE675191C (en) * | 1932-09-02 | 1939-05-02 | Siemens & Halske Akt Ges | Process for the production of an electrostatic capacitor with high dielectric strength |
DE898479C (en) * | 1940-07-11 | 1953-11-30 | Siemens Ag | Electrical capacitor with a dielectric made of reaction products grown on a covering metal |
-
1940
- 1940-07-11 DE DES16237D patent/DE975939C/en not_active Expired
Patent Citations (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE248857C (en) * | ||||
DE653605C (en) * | 1937-11-27 | Telefunken Gmbh | Electric capacitor made of several layered unit fins made from aluminum sheets | |
US1935395A (en) * | 1927-08-29 | 1933-11-14 | Fansteel Prod Co Inc | Film formation on valve metals |
GB388787A (en) * | 1930-09-25 | 1933-03-03 | Vaw Ver Aluminium Werke Ag | Improvements in and relating to the treatment of oxide coated aluminium and aluminium alloy surfaces |
DE667529C (en) * | 1931-02-11 | 1938-11-14 | Alexander Fekete Dipl Ing Dr | Method for producing a massive electrical capacitor |
GB374806A (en) * | 1931-12-18 | 1932-06-16 | Vaw Ver Aluminium Werke Ag | Improvements in the production of oxide coatings on aluminium and its alloys |
GB385763A (en) * | 1931-12-31 | 1933-01-05 | Vaw Ver Aluminium Werke Ag | Improvements in and relating to the treatment of oxide coatings on aluminium and aluminium alloys |
DE675191C (en) * | 1932-09-02 | 1939-05-02 | Siemens & Halske Akt Ges | Process for the production of an electrostatic capacitor with high dielectric strength |
DE657179C (en) * | 1935-10-29 | 1938-02-28 | Siemens & Halske Akt Ges | Process for the production of particularly puncture-resistant and low-loss oxide layers on aluminum and its alloys |
DE645206C (en) * | 1935-11-05 | 1937-05-24 | Ver Aluminium Werke Akt Ges | Process for the electrolytic oxidation of aluminum and aluminum alloys using alternating current |
DE898479C (en) * | 1940-07-11 | 1953-11-30 | Siemens Ag | Electrical capacitor with a dielectric made of reaction products grown on a covering metal |
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