GB772290A - Improvements relating to etching tantalum - Google Patents
Improvements relating to etching tantalumInfo
- Publication number
- GB772290A GB772290A GB34927/53A GB3492753A GB772290A GB 772290 A GB772290 A GB 772290A GB 34927/53 A GB34927/53 A GB 34927/53A GB 3492753 A GB3492753 A GB 3492753A GB 772290 A GB772290 A GB 772290A
- Authority
- GB
- United Kingdom
- Prior art keywords
- formamide
- tantalum
- solution
- dec
- lie
- 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
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 title abstract 4
- 229910052715 tantalum Inorganic materials 0.000 title abstract 3
- 238000005530 etching Methods 0.000 title 1
- ZHNUHDYFZUAESO-UHFFFAOYSA-N Formamide Chemical compound NC=O ZHNUHDYFZUAESO-UHFFFAOYSA-N 0.000 abstract 6
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 abstract 6
- FVAUCKIRQBBSSJ-UHFFFAOYSA-M sodium iodide Chemical compound [Na+].[I-] FVAUCKIRQBBSSJ-UHFFFAOYSA-M 0.000 abstract 3
- 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 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 abstract 2
- IOLCXVTUBQKXJR-UHFFFAOYSA-M potassium bromide Chemical compound [K+].[Br-] IOLCXVTUBQKXJR-UHFFFAOYSA-M 0.000 abstract 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 abstract 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 abstract 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 abstract 1
- 229910021594 Copper(II) fluoride Inorganic materials 0.000 abstract 1
- KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 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
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 abstract 1
- SWLVFNYSXGMGBS-UHFFFAOYSA-N ammonium bromide Chemical compound [NH4+].[Br-] SWLVFNYSXGMGBS-UHFFFAOYSA-N 0.000 abstract 1
- JZKFIPKXQBZXMW-UHFFFAOYSA-L beryllium difluoride Chemical compound F[Be]F JZKFIPKXQBZXMW-UHFFFAOYSA-L 0.000 abstract 1
- 229910001633 beryllium fluoride Inorganic materials 0.000 abstract 1
- 239000011575 calcium Substances 0.000 abstract 1
- 229910001634 calcium fluoride Inorganic materials 0.000 abstract 1
- 239000010949 copper Substances 0.000 abstract 1
- 238000000866 electrolytic etching Methods 0.000 abstract 1
- 150000004820 halides Chemical class 0.000 abstract 1
- 229910001502 inorganic halide Inorganic materials 0.000 abstract 1
- 239000011133 lead Substances 0.000 abstract 1
- 229910052744 lithium Inorganic materials 0.000 abstract 1
- 239000000203 mixture Substances 0.000 abstract 1
- 229910052759 nickel Inorganic materials 0.000 abstract 1
- 239000011734 sodium Substances 0.000 abstract 1
- PUZPDOWCWNUUKD-UHFFFAOYSA-M sodium fluoride Inorganic materials [F-].[Na+] PUZPDOWCWNUUKD-UHFFFAOYSA-M 0.000 abstract 1
- 235000009518 sodium iodide Nutrition 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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
772,290. Electrolytic etching of tantalum. GENERAL ELECTRIC CO. Dec. 15, 1953 [Dec. 17, 1952], No. 34927/53. Class 41. Tantalum is etched by making it the anode in an electrolytic bath consisting of a solution of an inorganic halide in formamide containing from 9.500 to 11.500 parts by weight of water per million parts of solution. The solution may also contain dimethyl formamide and the halide may be ammonium bromide, fluoride or bifluoride, potassium bromide, sodium iodide, nickel, lithium or ferris chloride or lead, calcium, sodium, copper or beryllium fluoride. The current density should lie within the range of 5-50 amps per sq. ft.; and the temperature should lie within the range of 20-65‹ C. In examples, tantalum foil electrodes were immersed as the anode in solutions of ammonium bifluoride in formamide or in a mixture of formamide and dimethyl formamide. Specification 691,509 is referred to.
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 |
|---|---|
| GB772290A true GB772290A (en) | 1957-04-10 |
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 Before (2)
| 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 |
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) |
Families Citing this family (10)
| 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 |
| US2834926A (en) * | 1954-11-16 | 1958-05-13 | Mallory & Co Inc P R | Tantalum electrolytic capacitor with iron chloride depolarizer |
| DE1191912B (en) * | 1954-11-25 | 1965-04-29 | Siemens Ag | Process for the production of low-temperature electrolytic capacitors using paper as a spacer |
| NL93969C (en) * | 1955-05-09 | |||
| US3070522A (en) * | 1957-11-08 | 1962-12-25 | Sprague Electric Co | Process for electrochemically etching tantalum foil |
| 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 |
| 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 |
| 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 |
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
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 |
| GB691509A (en) | 1953-05-13 |
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