| CMC Magnetics Corporation Patent applications |
| Patent application number | Title | Published |
|---|
| 20110236618 | OPTICAL RECORDING MEDIA - An optical recording media includes a substrate, a cap layer opposite to the substrate, at least one first stacked recording structure, at least one second stacked recording structure, and a space layer. The first stacked recording structure including a first recording layer disposed between the substrate and the cap layer and a reflective layer disposed between the substrate and the first recording layer is disposed between the substrate and the cap layer. The second stacked recording structure including a second recording layer disposed between the substrate and the cap layer and an Nb | 09-29-2011 |
| 20100297381 | Method of improving read stability of optical recording medium and optical recording medium manufactured using the method - A method for improving read stability of optical recording medium is disclosed. In the method, the thickness of a recording layer of an optical recording medium is adjusted to control the disc absorptivity, and the recording layer thickness is matched with a power difference between a laser write power (Pw) and a laser erase power (Pe), so as to control the optimal laser power for irradiating and accordingly changing the optical properties of the recording layer. It is found that by using properly increased recording layer thickness corresponding to a given disc absorptivity, and properly matching the recording layer thickness with a properly increased power difference, the read stability and recording characteristics of the optical recording media can be improved without significantly changing the layer structure and writing strategy of the optical recording medium. | 11-25-2010 |
| 20090176048 | AgSb recording thin film for the inorganic write-once optical disc and the manufacturing method - A recording material of Ag1-xSbx (x=10.8˜25.5 at. %) films for WORM optical disk recording media is invented. The thermal analysis shows that the phase change temperature of AgSb film is between 250 and 270□. The optical property analysis shows that all the as deposited films have good optical absorption and high reflectivity. The X-ray Diffraction analysis shows that the as deposited film and the annealed film are kept at ∈′-AgSb crystalline phase. The TEM analysis shows that the grain size of the Ag80.9Sb19.1 film will grow after annealing. The dynamic test shows that the carrier-to-noise ratio (CNR) of the Ag80.9Sb19.1 optical disc is about 45 dB with λ=657 nm, NA=0.65 and a linear velocity of 3.5 m/s. These Ag | 07-09-2009 |
| 20090122375 | Holographic information recording and reproducing apparatus for the same - In a holographic information recording and reproducing apparatus, an optical fiber guides a reference beam toward a recording medium for holographic recording, and a precision rotator is turned, so that the reference beam is incident on the recording medium at different angles and interferes with a data-carrying signal beam to complete the recording of holographic information on the recording medium. To reproduce the holographic information, the optical fiber guides a reading beam, and the reading beam is incident on the recording medium at an angle the same as the reference beam for the recording to reproduce the holographic information stored on the recording medium. With the optical fiber and the precision rotator, a simplified light path system and a wide range of incident angles for the reference and reading beams may be achieved, and the transmissive, reflective, and 90-degree holographic storage techniques may be integrated in one single apparatus. | 05-14-2009 |
| 20080222669 | Disk protecting plate - A disk protecting plate includes a disk-shaped plate body having a central through hole. The plate body is provided on one side with a centered and low-raised annular wall, and a plurality of reinforcing ribs radially outward extended from the annular wall. Each of the reinforcing ribs has a top gradually inclined toward an outer circumferential periphery of the plate body. The disk protecting plate with the radially outward inclined reinforcing ribs may be made with reduced material to obtain a reinforced overall structural strength without forming an excessively thick outer periphery, and a plurality of disks concentrically stacked and packaged between two pieces of the disk protecting plates could therefore be effectively protected against damage caused by compression or impact against the disk protecting plate. | 09-11-2008 |
