GB1101296A - Improvements in or relating to the manufacture of insulating oxide layers on metal bodies - Google Patents
Improvements in or relating to the manufacture of insulating oxide layers on metal bodiesInfo
- Publication number
- GB1101296A GB1101296A GB1611066A GB1611066A GB1101296A GB 1101296 A GB1101296 A GB 1101296A GB 1611066 A GB1611066 A GB 1611066A GB 1611066 A GB1611066 A GB 1611066A GB 1101296 A GB1101296 A GB 1101296A
- Authority
- GB
- United Kingdom
- Prior art keywords
- metal
- insulating oxide
- relating
- manufacture
- oxide layers
- 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 abstract 4
- 229910052751 metal Inorganic materials 0.000 title abstract 4
- 238000004519 manufacturing process Methods 0.000 title 1
- 230000000694 effects Effects 0.000 abstract 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 abstract 1
- 229910002651 NO3 Inorganic materials 0.000 abstract 1
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 abstract 1
- 229910052782 aluminium Inorganic materials 0.000 abstract 1
- 239000003990 capacitor Substances 0.000 abstract 1
- 239000003792 electrolyte Substances 0.000 abstract 1
- 230000001747 exhibiting effect Effects 0.000 abstract 1
- 150000004820 halides Chemical class 0.000 abstract 1
- 239000012535 impurity Substances 0.000 abstract 1
- 150000002500 ions Chemical class 0.000 abstract 1
- 229910052758 niobium Inorganic materials 0.000 abstract 1
- 230000003647 oxidation Effects 0.000 abstract 1
- 238000007254 oxidation reaction Methods 0.000 abstract 1
- 238000007788 roughening Methods 0.000 abstract 1
- 239000000126 substance Substances 0.000 abstract 1
- 229910052715 tantalum Inorganic materials 0.000 abstract 1
- 229910052726 zirconium 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
- H01G9/00—Electrolytic capacitors, rectifiers, detectors, switching devices, light-sensitive or temperature-sensitive devices; Processes of their manufacture
- H01G9/0029—Processes of manufacture
- H01G9/0032—Processes of manufacture formation of the dielectric layer
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D11/00—Electrolytic coating by surface reaction, i.e. forming conversion layers
- C25D11/02—Anodisation
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D11/00—Electrolytic coating by surface reaction, i.e. forming conversion layers
- C25D11/02—Anodisation
- C25D11/04—Anodisation of aluminium or alloys based thereon
- C25D11/16—Pretreatment, e.g. desmutting
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D11/00—Electrolytic coating by surface reaction, i.e. forming conversion layers
- C25D11/02—Anodisation
- C25D11/26—Anodisation of refractory metals or alloys based thereon
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Fixed Capacitors And Capacitor Manufacturing Machines (AREA)
- Inorganic Insulating Materials (AREA)
Abstract
An electrically insulating oxide layer is formed anodically on a metal exhibiting the valve effect, e.g. Al, Ta, Nb, Zr, by connecting the metal as cathode with an applied voltage of 2 to 20 volts before the anodic oxidation step. The cathodic treatment is stated to effect removal to the counter electrode of impurities present in the forming electrolyte, such as nitrate and halide (e.g. chloride) ions which also may be introduced by the metal to be oxidized due to a previous chemical or electrolytic roughening treatment. The invention is disclosed as applied especially to electrolytic capacitors.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DES0096530 | 1965-04-14 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1101296A true GB1101296A (en) | 1968-01-31 |
Family
ID=7520139
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1611066A Expired GB1101296A (en) | 1965-04-14 | 1966-04-13 | Improvements in or relating to the manufacture of insulating oxide layers on metal bodies |
Country Status (7)
| Country | Link |
|---|---|
| AT (1) | AT260385B (en) |
| BE (1) | BE679524A (en) |
| CH (1) | CH467869A (en) |
| DE (1) | DE1496997C3 (en) |
| ES (1) | ES325480A1 (en) |
| GB (1) | GB1101296A (en) |
| NL (1) | NL6604402A (en) |
-
1965
- 1965-04-14 DE DE19651496997 patent/DE1496997C3/en not_active Expired
-
1966
- 1966-04-01 NL NL6604402A patent/NL6604402A/xx unknown
- 1966-04-12 AT AT346466A patent/AT260385B/en active
- 1966-04-12 CH CH531166A patent/CH467869A/en unknown
- 1966-04-13 GB GB1611066A patent/GB1101296A/en not_active Expired
- 1966-04-13 ES ES0325480A patent/ES325480A1/en not_active Expired
- 1966-04-14 BE BE679524D patent/BE679524A/xx unknown
Also Published As
| Publication number | Publication date |
|---|---|
| DE1496997B2 (en) | 1971-07-01 |
| DE1496997C3 (en) | 1974-11-14 |
| NL6604402A (en) | 1966-10-17 |
| DE1496997A1 (en) | 1970-01-08 |
| ES325480A1 (en) | 1967-02-16 |
| BE679524A (en) | 1966-10-14 |
| CH467869A (en) | 1969-01-31 |
| AT260385B (en) | 1968-03-11 |
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