Substrate design for bonded storage disks and method of making same
US6020042A · kind A · utility
1Cited by
2References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 14, 1998 |
| Grant date | Feb 1, 2000 |
| Priority date | — |
| Expiry date | Oct 14, 2018 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/219
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
An improved substrate and stamper holder and method of forming substrates are disclosed. According to a preferred embodiment of the invention, a substrate for a DVD has a moat with a capillary barrier shape. Under one embodiment, the moat has a region with an abrupt outer diameter transition. One embodiment has the outer diameter transition at approximately at a right angle relative to a registering surface of the substrate. Another embodiment of the invention provides a wider moats. The improvements reduce the likelihood of resin wicking past the moats.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.