Surface hardened resins for disk substrates, methods of manufacture thereof and production devices for the manufacture thereof
US6555182B1 · kind B1 · utility
4Cited by
12References
21Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Jul 1, 1999 |
| Grant date | Apr 29, 2003 |
| Priority date | — |
| Expiry date | Jul 1, 2019 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C2043/566
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A surface hardening method for resins and a surface hardened resin, capable of reforming the surface of a plastic disk substrate at low energy in a short time, and a production device of such a resin is disclosed. The formation of an ion-implanted layer 11 by implanting equal to or more than 1017 carbon ions per cm2 into the surface of a plastic disk substrate 10 at equal to or less than 20 KeV and the formation of a thin film 12 of high hardness on the ion-implanted layer 11 can be performed alternately or simultaneously, and the hardening rate is increased further by using a bias device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.