Process for aluminum surface preparation
US4502925A · kind A · utility
17Cited by
6References
21Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 11, 1984 |
| Grant date | Mar 5, 1985 |
| Priority date | — |
| Expiry date | Jun 11, 2004 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC25F3/04
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A method for treating an aluminum sheet useful for lithography by etching said sheet in an aqueous bath containing up to about 25% of nitric and/or hydrochloric acids and from about 1% to about 25% of an inorganic fluorine containing acid or salt thereof. Said etching step is sequentially followed by electrochemical graining and anodizing process steps.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.