Method for testing mold structure and magnetic recording medium
US7888930B2 · kind B2 · utility
1Cited by
0References
5Claims
0Family size
Assignee
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Key dates
| Filing date | Jun 20, 2008 |
| Grant date | Feb 15, 2011 |
| Priority date | — |
| Expiry date | Apr 25, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/855
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The present invention provides a method for testing a disc shaped mold structure having a convexo-concave pattern formed on a surface thereof based on a desired design pattern, including at least: transferring a magnetic signal corresponding to a convexo-concave pattern formed on the entire surface of the mold structure to a medium in a direction perpendicular to the surface of the medium, obtaining a reproduction signal by electrically reproducing the magnetic signal from the medium onto which the magnetic signal has been transferred, and comparing the desired design pattern with the reproduction signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.