GB691509A - Improvements in and relating to capacitor electrodes - Google Patents
Improvements in and relating to capacitor electrodesInfo
- Publication number
- GB691509A GB691509A GB19697/51A GB1969751A GB691509A GB 691509 A GB691509 A GB 691509A GB 19697/51 A GB19697/51 A GB 19697/51A GB 1969751 A GB1969751 A GB 1969751A GB 691509 A GB691509 A GB 691509A
- Authority
- GB
- United Kingdom
- Prior art keywords
- per cent
- fluoride
- methanol
- strips
- ammonium
- 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 2
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 abstract 9
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 abstract 6
- MIMUSZHMZBJBPO-UHFFFAOYSA-N 6-methoxy-8-nitroquinoline Chemical compound N1=CC=CC2=CC(OC)=CC([N+]([O-])=O)=C21 MIMUSZHMZBJBPO-UHFFFAOYSA-N 0.000 abstract 3
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 abstract 3
- FVAUCKIRQBBSSJ-UHFFFAOYSA-M sodium iodide Chemical compound [Na+].[I-] FVAUCKIRQBBSSJ-UHFFFAOYSA-M 0.000 abstract 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract 3
- DDFHBQSCUXNBSA-UHFFFAOYSA-N 5-(5-carboxythiophen-2-yl)thiophene-2-carboxylic acid Chemical compound S1C(C(=O)O)=CC=C1C1=CC=C(C(O)=O)S1 DDFHBQSCUXNBSA-UHFFFAOYSA-N 0.000 abstract 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 abstract 2
- KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 abstract 2
- ZHNUHDYFZUAESO-UHFFFAOYSA-N Formamide Chemical compound NC=O ZHNUHDYFZUAESO-UHFFFAOYSA-N 0.000 abstract 2
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 abstract 2
- 239000003792 electrolyte Substances 0.000 abstract 2
- 229910001502 inorganic halide Inorganic materials 0.000 abstract 2
- KWGKDLIKAYFUFQ-UHFFFAOYSA-M lithium chloride Chemical compound [Li+].[Cl-] KWGKDLIKAYFUFQ-UHFFFAOYSA-M 0.000 abstract 2
- LQNUZADURLCDLV-UHFFFAOYSA-N nitrobenzene Chemical compound [O-][N+](=O)C1=CC=CC=C1 LQNUZADURLCDLV-UHFFFAOYSA-N 0.000 abstract 2
- 239000003960 organic solvent Substances 0.000 abstract 2
- IOLCXVTUBQKXJR-UHFFFAOYSA-M potassium bromide Chemical compound [K+].[Br-] IOLCXVTUBQKXJR-UHFFFAOYSA-M 0.000 abstract 2
- 229910052715 tantalum Inorganic materials 0.000 abstract 2
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 abstract 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 abstract 1
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 abstract 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 abstract 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 abstract 1
- 229910021586 Nickel(II) chloride Inorganic materials 0.000 abstract 1
- 229910052790 beryllium Inorganic materials 0.000 abstract 1
- ATBAMAFKBVZNFJ-UHFFFAOYSA-N beryllium atom Chemical compound [Be] ATBAMAFKBVZNFJ-UHFFFAOYSA-N 0.000 abstract 1
- 239000011575 calcium Substances 0.000 abstract 1
- 229910052791 calcium Inorganic materials 0.000 abstract 1
- 239000001110 calcium chloride Substances 0.000 abstract 1
- 229910001628 calcium chloride Inorganic materials 0.000 abstract 1
- 229910052802 copper Inorganic materials 0.000 abstract 1
- 239000010949 copper Substances 0.000 abstract 1
- XXJWXESWEXIICW-UHFFFAOYSA-N diethylene glycol monoethyl ether Chemical compound CCOCCOCCO XXJWXESWEXIICW-UHFFFAOYSA-N 0.000 abstract 1
- 229940075557 diethylene glycol monoethyl ether Drugs 0.000 abstract 1
- 238000000866 electrolytic etching Methods 0.000 abstract 1
- 238000005530 etching Methods 0.000 abstract 1
- 235000019441 ethanol Nutrition 0.000 abstract 1
- 235000011187 glycerol Nutrition 0.000 abstract 1
- 150000004820 halides Chemical class 0.000 abstract 1
- 238000005470 impregnation Methods 0.000 abstract 1
- 230000037431 insertion Effects 0.000 abstract 1
- 238000003780 insertion Methods 0.000 abstract 1
- 239000011810 insulating material Substances 0.000 abstract 1
- 239000011133 lead Substances 0.000 abstract 1
- 239000000203 mixture Substances 0.000 abstract 1
- QMMRZOWCJAIUJA-UHFFFAOYSA-L nickel dichloride Chemical compound Cl[Ni]Cl QMMRZOWCJAIUJA-UHFFFAOYSA-L 0.000 abstract 1
- 150000003839 salts Chemical class 0.000 abstract 1
- 229910052708 sodium Inorganic materials 0.000 abstract 1
- 239000011734 sodium Substances 0.000 abstract 1
- 235000009518 sodium iodide Nutrition 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
- H01G9/004—Details
- H01G9/04—Electrodes or formation of dielectric layers thereon
- H01G9/048—Electrodes or formation of dielectric layers thereon characterised by their structure
- H01G9/055—Etched foil electrodes
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25F—PROCESSES FOR THE ELECTROLYTIC REMOVAL OF MATERIALS FROM OBJECTS; APPARATUS THEREFOR
- C25F3/00—Electrolytic etching or polishing
- C25F3/02—Etching
- C25F3/08—Etching of refractory metals
-
- 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
- H01G9/004—Details
- H01G9/04—Electrodes or formation of dielectric layers thereon
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- ing And Chemical Polishing (AREA)
- Weting (AREA)
- Electrolytic Production Of Metals (AREA)
Abstract
691,509. Electrolytic etching; electrolytic condensers. BRITISH THOMSON-HOUSTON CO., Ltd. Aug. 21, 1951 [Aug. 29, 1950], No. 19697/51. Classes 37 and 41. Tantalum is etched in order to provide an increased effective area when used as a capacitor electrode by treatment as anode in an electrolyte comprising ;at least 6.5 per cent by weight of methanol, a trace of water and a methanolsoluble inorganic halide. Methanol may constitute the sole organic solvent tor may be admixed with other organic solvents ;such as ethylene glycol, ethyl alcohol, isopropyl alcohol, nitrobenzene, glycerine, diethylene glycol monoethyl ether, or formamide. The inorganic halide is preferably a fluoride, e.g. ammonium fluoride or bifluoride, or fluoride of lead, calcium, sodium, copper or beryllium; it should be present in amount sufficient to permit passage of a current. Other ;suitable halides are nickel chloride, lithium chloride, calcium chloride, potassium bromide and sodium iodide. The concentration of ammonium fluoride may be 1.3-4.1 per cent or of ammonium bifluoride 0.62-6.1 per cent; mixtures of these salts may be used. The water content of the solution may be 3.000- 50,000 parts .by weight per million. The ratio of the effective area of the surface produced by the etching to the projected area may be 1.5-6.5 or more. A ratio of 6.65 was obtained by using a solution containing 58 per cent methanol, 39.8 per cent ethylene glycol and 2.2 per cent ammonium bifluoride with about 4200 parts per million of water at 20-25‹ C. The temperature of the solution may be 20- 65‹C.; the lower temperatures in this range are employed when a low voltage is to be employed in the subsequent treatment to develop a dielectric film on the surface. The capacitator may comprise tantalum strips 10, 11 etched in accordance with.the invention and separated by strips 12, 13, 14, 15 of paper or other porous insulating material, all wound into a compact roll for impregnation with a suitable-electrolyte before or after insertion in a container. Terminal straps 17, 18 are fixed to the respective strips and extend through insulating plugs at either end of the container.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US307013XA | 1950-08-29 | 1950-08-29 | |
| US772290XA | 1952-12-17 | 1952-12-17 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB691509A true GB691509A (en) | 1953-05-13 |
Family
ID=26706363
Family Applications (3)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB19697/51A Expired GB691509A (en) | 1950-08-29 | 1951-08-21 | Improvements in and relating to capacitor electrodes |
| GB13966/52A Expired GB702877A (en) | 1950-08-29 | 1952-06-03 | Method of electrolytically etching tantalum |
| GB34927/53A Expired GB772290A (en) | 1950-08-29 | 1953-12-15 | Improvements relating to etching tantalum |
Family Applications After (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB13966/52A Expired GB702877A (en) | 1950-08-29 | 1952-06-03 | Method of electrolytically etching tantalum |
| GB34927/53A Expired GB772290A (en) | 1950-08-29 | 1953-12-15 | Improvements relating to etching tantalum |
Country Status (6)
| Country | Link |
|---|---|
| BE (3) | BE525144A (en) |
| CH (2) | CH307013A (en) |
| DE (2) | DE925330C (en) |
| FR (4) | FR1078317A (en) |
| GB (3) | GB691509A (en) |
| NL (4) | NL170580B (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2863811A (en) * | 1955-05-09 | 1958-12-09 | Gen Electric | Method of etching capacitor electrodes |
| DE1110313B (en) * | 1954-11-16 | 1961-07-06 | Mallory & Co Inc P R | Electrolytic capacitor with tantalum anode |
| US3070522A (en) * | 1957-11-08 | 1962-12-25 | Sprague Electric Co | Process for electrochemically etching tantalum foil |
| DE1191912B (en) * | 1954-11-25 | 1965-04-29 | Siemens Ag | Process for the production of low-temperature electrolytic capacitors using paper as a spacer |
| CN113745007A (en) * | 2021-08-24 | 2021-12-03 | 西安交通大学 | Electrochemical corrosion dilatation process of anode foil of tantalum electrolytic capacitor |
| CN116288636A (en) * | 2023-02-06 | 2023-06-23 | 安徽格兰科新材料技术有限公司 | High-pressure-resistant ordered porous tantalum foil and preparation method and application thereof |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2775553A (en) * | 1952-12-31 | 1956-12-25 | Sprague Electric Co | Electrolytic etching process for electrolytic capacitors |
| NL291334A (en) * | 1962-04-27 | |||
| CN108441936A (en) * | 2018-04-19 | 2018-08-24 | 湖南工业大学 | A kind of preparation method of spongy tantalum piece |
| CN108456917A (en) * | 2018-04-19 | 2018-08-28 | 湖南工业大学 | A kind of preparation method of porous tantalum piece |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2035022A (en) * | 1931-03-28 | 1936-03-24 | Sprague Specialties Co | Electrolytic device |
| US2183091A (en) * | 1936-07-20 | 1939-12-12 | Philips Nv | Electrolytic cell |
-
0
- BE BE505482D patent/BE505482A/xx unknown
- BE BE512764D patent/BE512764A/xx unknown
- BE BE525144D patent/BE525144A/xx unknown
- NL NL77804D patent/NL77804C/xx active
- NL NL80311D patent/NL80311C/xx active
- NL NL7017503.A patent/NL163609B/en unknown
- NL NLAANVRAGE7613247,A patent/NL170580B/en unknown
-
1951
- 1951-08-21 GB GB19697/51A patent/GB691509A/en not_active Expired
- 1951-08-27 CH CH307013D patent/CH307013A/en unknown
- 1951-08-28 DE DEI4557A patent/DE925330C/en not_active Expired
- 1951-08-28 FR FR1078317D patent/FR1078317A/en not_active Expired
-
1952
- 1952-06-03 GB GB13966/52A patent/GB702877A/en not_active Expired
- 1952-06-24 CH CH311511D patent/CH311511A/en unknown
- 1952-07-04 FR FR63070D patent/FR63070E/en not_active Expired
-
1953
- 1953-12-09 DE DEG13258A patent/DE942004C/en not_active Expired
- 1953-12-15 FR FR1095024D patent/FR1095024A/en not_active Expired
- 1953-12-15 GB GB34927/53A patent/GB772290A/en not_active Expired
-
1956
- 1956-05-09 FR FR69991D patent/FR69991E/en not_active Expired
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1110313B (en) * | 1954-11-16 | 1961-07-06 | Mallory & Co Inc P R | Electrolytic capacitor with tantalum anode |
| DE1191912B (en) * | 1954-11-25 | 1965-04-29 | Siemens Ag | Process for the production of low-temperature electrolytic capacitors using paper as a spacer |
| US2863811A (en) * | 1955-05-09 | 1958-12-09 | Gen Electric | Method of etching capacitor electrodes |
| US3070522A (en) * | 1957-11-08 | 1962-12-25 | Sprague Electric Co | Process for electrochemically etching tantalum foil |
| CN113745007A (en) * | 2021-08-24 | 2021-12-03 | 西安交通大学 | Electrochemical corrosion dilatation process of anode foil of tantalum electrolytic capacitor |
| CN113745007B (en) * | 2021-08-24 | 2023-03-28 | 西安交通大学 | Electrochemical corrosion dilatation process of anode foil of tantalum electrolytic capacitor |
| CN116288636A (en) * | 2023-02-06 | 2023-06-23 | 安徽格兰科新材料技术有限公司 | High-pressure-resistant ordered porous tantalum foil and preparation method and application thereof |
| CN116288636B (en) * | 2023-02-06 | 2024-05-03 | 安徽格兰科新材料技术有限公司 | High-pressure-resistant ordered porous tantalum foil and preparation method and application thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| BE505482A (en) | |
| FR1095024A (en) | 1955-05-26 |
| GB702877A (en) | 1954-01-27 |
| NL170580B (en) | |
| NL77804C (en) | |
| BE512764A (en) | |
| NL80311C (en) | |
| FR63070E (en) | 1955-07-15 |
| DE942004C (en) | 1956-04-26 |
| CH311511A (en) | 1955-11-30 |
| BE525144A (en) | |
| NL163609B (en) | |
| FR1078317A (en) | 1954-11-17 |
| FR69991E (en) | 1959-01-30 |
| CH307013A (en) | 1955-05-15 |
| DE925330C (en) | 1955-03-17 |
| GB772290A (en) | 1957-04-10 |
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