Abstract: An optical recording medium including a substrate having guide groove thereon; a first protective layer located overlying the substrate; a recording layer located overlying the first protective layer; a second protective layer located overlying the recording layer; a third protective layer of from 2 to 9 nm thick located overlying the second protective layer and comprising Si in an amount not less than 35 atomic percent; and a reflection layer including Ag in an amount not less than 95% by weight. An overcoat layer having a glass transition temperature of from 90° C. to 180° C. is preferably formed overlying the reflection layer. A method for manufacturing the optical recording medium is also provided.

Abstract: There is provided a method and a device for recording optical data able to improve recording power setting during recording by means of PWM with a small number of pulses. During the test recording, using a period of a recording channel clock Tw as the minimum unit, marks having different mark lengths of n1·Tw and n2·Tw (n1<n2) are recorded with the same number of m (m<n) light emitting pulses, while successively changing the maximum power Pw of the recording signals. The recorded marks are reproduced and the mark lengths T1 and T2 are measured from the reproduced signals. The recording power can be set by evaluating the deviations D1=T1−n1·Tw and D2=T2−n2·Tw.

Abstract: An optical information recording medium including a substrate, a light absorbing layer which is located overlying the substrate and in which marks are formed to store information and a light reflection layer located overlying the light absorbing layer including a crystal, wherein the optical information recording medium satisfies the relationship, Lt/4≦Lc≦Lm, wherein Lc represents the average particle diameter of the crystal of the light reflection layer, Lm represents the minimum length of the marks, and Lt represents the thickness of the light reflection layer.

Abstract: A vehicle-mounted information processing device includes a platform having vehicle-mounted hardware and one or more basic functions to control the hardware. An application processing unit performs processing using the one or more basic functions of the platform. When transferring information from the platform to the application processing unit, a single interface unit transfers the information in a constant data format. When transferring information from the application processing unit to the platform, the single interface unit transfers the information in a data format corresponding to the platform.

Abstract: A phase-change optical information recording medium in which information can be recorded, reproduced and rewritten and which includes a first transparent substrate having a wobbling guide groove which is spirally formed thereon at a pitch; a first dielectric layer located overlying the first transparent substrate and having an optical thickness of from 80 nm to 200 nm; a phase-change recording layer located overlying the first dielectric layer and having an optical thickness of from 20 to 50 nm when the recording layer is in an erased state; a second dielectric layer located overlying the recording layer and having an optical thickness of from 10 nm to 70 nm; a reflection layer located overlying the second dielectric layer; optionally a third dielectric layer located between the second dielectric layer and the reflection layer; and a second transparent substrate located overlying the reflection layer.

Abstract: An optical information recording method including: irradiating a recording medium with laser light, wherein 0 signals having width nT are recorded or rewritten using continuous laser light having a power level Pe, and 1 signals having width nT are recorded or rewritten using a light pulse train having a first pulse portion fp having power Pw and width xT (T: clock time), a multi-pulse portion mp in which a number (n−n′) of high level pulses each having power Pw′ and width yT, and, if (n−n′)>1, a low level pulse which has power Pb and width (1−y)T are applied, and an end pulse portion ep having power Pb′ and width zT, wherein n and n′ are a positive integer (n>n′), and wherein each of Pw and Pw′ is greater than Pe, Pe is greater than each of Pb and Pb′, and at least one of x, y and z is in a range as follows: 0.35≦x≦0.75, 0.30≦y≦0.55, 0.35≦z≦0.70.

Abstract: An optical information recording medium is provided. This medium at least stores information that indicates a maximum recording linear velocity Vh. The medium comprises a substrate having a concentric circular guide groove. This guide grove has land portions and groves portions. At least a phase change type recording layer is formed on the substrate. The recording layer has such a composition and thickness that a dislocation linear velocity V satisfies the relation V≧Vh×0.85.

Abstract: A vehicle-mounted information processing device comprises a platform having vehicle-mounted hardware and one or more basic functions to control the hardware. An application processing unit performs a predetermined processing by using the one or more basic functions of the platform. When transferring information from the platform to the application processing unit, a single interface unit transfers it in a constant data format. When transferring information from the application processing unit to the platform, the single interface unit transfers it in a certain data format corresponding to the platform.