Inorganic substrate
Subclass of:
428 - Stock material or miscellaneous articles
428800000 - MAGNETIC RECORDING COMPONENT OR STOCK
428846000 - Magnetic recording media substrate
Patent class list (only not empty are listed)
Deeper subclasses:
| Class / Patent application number | Description | Number of patent applications / Date published |
|---|---|---|
| 428846900 | Glass or ceramic substrate | 57 |
| 428846600 | Metallic (i.e., elemental or alloy) substrate | 21 |
| 428846200 | Composite or coated substrate (e.g., ceramic-epoxy composite, etc.) | 21 |
| 428846500 | Carbon substrate | 1 |
| 20080292909 | MAGNETIC RECORDING MEDIUM AND MAGNETIC STORAGE APPARATUS - This magnetic recording medium has a substrate, a nonmagnetic granular layer formed above the substrate and a recording layer formed on the nonmagnetic granular layer. The nonmagnetic granular layer is made of CoCr alloy with an hcp or an fcc crystal structure in which a nonmagnetic material segregates virtually-columnar magnetic grains. The magnetic recording medium and the magnetic storage apparatus in which the medium is used have improved reading/writing performances. | 11-27-2008 |
| Entries | ||
| Document | Title | Date |
|---|---|---|
| 20090117411 | MAGNETIC DISK SUBSTRATE AND MAGNETIC DISK THEREOF - The object of present invention is to provide a magnetic disk substrate which uses a silicon substrate, in which chamfered surfaces are provided between the main surfaces of the silicon substrate and the outer circumferential surface; a ski-jump value H | 05-07-2009 |
| 20100209740 | PERPENDICULAR MAGNETIC RECORDING MEDIUM - [Object] The present invention provides a perpendicular magnetic recording medium that can reduce noise by further size reduction and isolation of magnetic grains in a magnetic recording layer and can increase the recording density by improvement of the SNR. | 08-19-2010 |
| 20120288735 | PERPENDICULAR MAGNETIC RECORDING MEDIUM - This document discloses a perpendicular magnetic recording medium in which the magnetic anisotropy of a magnetic recording layer is raised and the thermal stability of recorded signals is improved without changing the conventional stacked configuration. A perpendicular magnetic recording medium is formed by stacking at least an intermediate layer, a second underlayer, and a magnetic recording layer in this order on a nonmagnetic base. The intermediate layer is either a single layer of Ru or a Ru-based alloy, or a stacked structure of a nonmagnetic alloy film including Co and Cr and a film of Ru or a Ru-based alloy. The second underlayer includes Co in the range from 30 at % to 75 at %, Cr in the range from 20 at % to 60 at %, and W in the range from 0.1 at % to 10 at %, and has a thickness in the range from 0.1 nm to 1.0 nm. | 11-15-2012 |