Method of coating a workpiece of a plastic material by a metal layer
US5400317A · kind A · utility
12Cited by
10References
9Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Apr 1, 1993 |
| Grant date | Mar 21, 1995 |
| Priority date | — |
| Expiry date | Apr 1, 2013 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC23C14/35
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
An optical storage disk has a body made of PMMA bulk material with a surface of PMMA. Aluminum or an aluminum alloy, light reflecting layer coats the PMMA surface and is applied using a sputtering apparatus in a sealed gas atmosphere containing argon and carbon containing gas. Application of the coating using sputtering takes place immediately after the PMMA body is inserted into the sealed gas atmosphere and without any pretreatment to the PMMA surface.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.