Process for producing black integrally colored anodized aluminum components
US5066368A · kind A · utility
40Cited by
17References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 17, 1990 |
| Grant date | Nov 19, 1991 |
| Priority date | — |
| Expiry date | Aug 17, 2010 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05K3/44
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A process for producing electronic package components from an aluminum alloy is disclosed. The components have a black color through integral color anodization. The desired color, thickness and surface finish are achieved by regulation of amperage during anodization. The amperage is rapidly raised to in excess of 70 amps per square foot and then allowed to gradually decrease as a function of oxide growth while the voltage is maintained in excess of 70 volts.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.