IT1142706B - Electrolytic etching of aluminium - Google Patents
Electrolytic etching of aluminiumInfo
- Publication number
- IT1142706B IT1142706B IT48764/81A IT4876481A IT1142706B IT 1142706 B IT1142706 B IT 1142706B IT 48764/81 A IT48764/81 A IT 48764/81A IT 4876481 A IT4876481 A IT 4876481A IT 1142706 B IT1142706 B IT 1142706B
- Authority
- IT
- Italy
- Prior art keywords
- maximum
- etching
- stage time
- higher capacitance
- wave form
- Prior art date
Links
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title 1
- 229910052782 aluminium Inorganic materials 0.000 title 1
- 239000004411 aluminium Substances 0.000 title 1
- 238000000866 electrolytic etching Methods 0.000 title 1
- 230000007423 decrease Effects 0.000 abstract 2
- 238000005530 etching Methods 0.000 abstract 2
- 239000011888 foil Substances 0.000 abstract 2
- 238000000034 method Methods 0.000 abstract 2
- 239000003990 capacitor Substances 0.000 abstract 1
- 239000003792 electrolyte Substances 0.000 abstract 1
Landscapes
- ing And Chemical Polishing (AREA)
Abstract
Etching is carried out by applying an a.c. to Al in contact with an electrolyte contg. HCl. The wave form of the current rises rapidly from 0 to a maximum and then decreases rapidly to an intermediate value a third to a half of the maximum. Decrease to zero then occurs more slowly. The ratio of first stage time to second stage time is 1-6. Higher capacitance values of the etched Al are obtd. The process is used to increase the surface area of Al foil used for capacitor electrodes. The wave form produces higher capacitance foil than square, sinusoidal or saw-tooth wave forms. The etching process is at least 10% more efficient.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IT48764/81A IT1142706B (en) | 1981-06-25 | 1981-06-25 | Electrolytic etching of aluminium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IT48764/81A IT1142706B (en) | 1981-06-25 | 1981-06-25 | Electrolytic etching of aluminium |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| IT8148764A0 IT8148764A0 (en) | 1981-06-25 |
| IT1142706B true IT1142706B (en) | 1986-10-15 |
Family
ID=11268442
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| IT48764/81A IT1142706B (en) | 1981-06-25 | 1981-06-25 | Electrolytic etching of aluminium |
Country Status (1)
| Country | Link |
|---|---|
| IT (1) | IT1142706B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2441983A (en) * | 2006-07-14 | 2008-03-26 | Aea Technology Plc | Catalytic structures for use in catalytic reactors |
-
1981
- 1981-06-25 IT IT48764/81A patent/IT1142706B/en active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2441983A (en) * | 2006-07-14 | 2008-03-26 | Aea Technology Plc | Catalytic structures for use in catalytic reactors |
Also Published As
| Publication number | Publication date |
|---|---|
| IT8148764A0 (en) | 1981-06-25 |
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