265 results about "Write strategy" patented technology

A DVD-R recorder according to the invention detects an item of recording speed information (d15) from a DVD-R (30) on which histories of recording speed information, write strategy, and recording power condition are stored. When the decoded item of recording speed information (d15) agrees with a set item of recording speed information (d17), the recorder detects the write strategy (d6) and the recording power condition (d10) corresponding to the decoded item of recording speed information (d15). A recording-pulse-determination section (9) converts a recording pattern (d8) into a recording pulse (d9) according to the write strategy (d6). A recording-power-determination section (12) performs an OPC based on the recording power condition (d10). The recording power condition (d10) may include information specifying that a recording pulse corresponding to the front edge of a recorded mark has a larger recording power than other recording pulses.

The present invention relates to preparation of patterned reticles to be used as masks in the production of semiconductor and other devices. Methods and devices are described utilizing resist and transfer layers over a masking layer on a reticle. The methods and devices produce small feature dimensions in masks and phase shift masks. The methods described for masks are in many cases applicable to the direct writing on other workpieces having similarly small features, such as semiconductor, cryogenic, magnetic and optical microdevices.

On a recording medium, the version information indicating a version of the recording standard to which the information recording medium is adapted is recorded. Moreover, the normal recording condition information for recording information at a normal recording speed and the high speed recording condition information for recording the information at a higher recording speed than the normal recording speed are recorded. The recording condition information includes, for example, information about a write strategy for driving a laser light source. At the time of recording, the information recording device compares the version information on the information recording medium with the version information of the information recording device so as to judge whether or not the information can be recorded. When the judgment is made that the information cannot be recorded based on the version information, further the compatibility version information is compared with the version information of the information recording device so that a judgment is made as to whether or not the information can be recorded. In such a manner, the judgment can be properly made as to whether or not the recording can be executed on the information recording medium.An information recording medium contains version information indicating to which version of the recording specification the information recording medium corresponds. Moreover, the medium contains standard recording condition information for recording information at a standard speed and high-speed recording condition information for recording information at a higher speed. An information recording device compares the version information on the information recording medium to the version information of the information recording device side to judge whether information recording is enabled. When it is judged that information recording is disabled according to the version information .

In order to meet the requirement for enhancing the speed of an optical disk apparatus, it is necessary to have a write strategy for compensating thermal interference during recording at high speed on a high-density optical disk such as BD. However, there has been no known technology for such a write strategy. By shifting the start position and the end position of a recording pulse in accordance with the preceding mark length, the preceding space length, the recording mark length, and the following space length, excellent jitter values have been obtained. Further, by simplifying parameters when the preceding pattern contains the shortest mark and the shortest space which cause large thermal interference, 12× BD recording can be achieved with the number of parameters smaller than double the number of parameters of the conventional 4×4 type write strategy.

In an optical disc in / from which data is recorded or reproduced by irradiating a storage area on the optical disc with a laser, information containing recording velocity information (RVI) for recording / reproduction, which represents a linear velocity different from the standard linear velocity, and write strategy information (WSI) corresponding to the recording velocity information is stored in a land pre-pit or the like on the optical disc.

Optical medium identification codes, such as the ATIP start codes used for CD-R optical media, are preassigned by optical medium manufacturer for association with planned optical media of the manufacturer. Optical disc drive manufacturers build optical disc drives having the preassigned optical medium identification codes in write strategy tables even though the optical disc drives are manufactured and sold before release and development of write strategies for the planned optical media. General write strategies associated with the preassigned optical medium identification codes provide more rapid write speeds for optical media having preassigned codes than for optical media having unknown identification codes by basing the preassigned write strategies on planned optical media design parameters, such as similarities with existing optical media of the manufacturer.