摘要:
A GaN crystal substrate is provided, which has a diameter of not less than 20 mm and a thickness of not less than 70 μm and not more than 450 μm, and has a light absorption coefficient of not less than 7 cm−1 and not more than 68 cm−1 for light in the wavelength range of not less than 375 nm and not more than 500 nm. A fabricating method of the GaN crystal substrate, and a light-emitting device fabricated using the GaN crystal substrate are also provided.
摘要:
There is provided a disc player apparatus capable of transporting a disc (11) by holding the disc (11) between a lower roller (70) and an upper roller (80). The lower roller (70) and the upper roller (80) are rockably supported with respect to a main body (20a). A flat spring (210) which urges the upper roller (80) is attached to an upper case (200a) that is attached to the main body (20a). The urge of the flat spring (210) is applied via a roller support member (810) which supports the upper roller (80). The pressure is applied evenly to the upper roller (80), enabling to reduce diagonal travel of the disc for example, and to transport the disc smoothly.
摘要:
A lubricating oil composition for a wet clutch, particularly for an automatic transmission, which comprises mineral oil, synthetic oil or a mixture thereof as a base oil, and which contains 0.1 to 4.0% by weight of at least one compound selected from the group consisting of calcium sulfonate and calcium phenate, 0.1 to 0.5% by weight of zinc dithiophosphate, and 0.1 to 1.5% by weight of a bisphenol antioxidant, each based on the total weight of the lubricating oil composition. The composition has excellent initial anti-shudder properties, anti-shudder properties of long duration, and good thermal-oxidative stability.
摘要:
The present invention provides a semiconductor device capable of selecting a desired circuit (step-down circuit (or step-up/step-down circuit) and step-up circuit) on the user side at low cost. A semiconductor device according to the present invention includes a diode element and a switching element (IGBT). An anode terminal of the diode element and one main electrode terminal of the switching element are adjacently arranged at a predetermined distance from each other. In addition, a cathode terminal of the diode element and the other main electrode terminal of the switching element are adjacently arranged at another predetermined distance from each other.
摘要:
Lubricating oil compositions for transmissions comprises (A) a lubricating base oil with a kinematic viscosity at 100° C. adjusted to 1.5 to 6 mm2/s, composed of (A1) a lubricating base oil with a kinematic viscosity at 100° C. of 1.5 mm2/s or higher and lower than 7 mm2/s or (A1) the lubricating oil and (A2) a lubricating base oil with a kinematic viscosity at 100° C. of 7 to 50 mm2/s, blended with (B) a poly(meth)acrylate-based additive, so that the composition has a kinematic viscosity at 100° C. of 3 to 8 mm2/s and a viscosity index of 95 to 200, (A) and (B) fulfill a specific requirement. The compositions achieve long fatigue life though having low viscosity.
摘要:
A GaN crystal substrate is provided, which has a diameter of not less than 20 mm and a thickness of not less than 70 μm and not more than 450 μm, and has a light absorption coefficient of not less than 7 cm−1 and not more than 68 cm−1 for light in the wavelength range of not less than 375 nm and not more than 500 nm. A fabricating method of the GaN crystal substrate, and a light-emitting device fabricated using the GaN crystal substrate are also provided.
摘要:
Lubricating oil compositions for transmissions comprises (A) a lubricating base oil with a kinematic viscosity at 100° C. adjusted to 1.5 to 6 mm2/s, composed of (A1) a lubricating base oil with a kinematic viscosity at 100° C. of 1.5 mm2/s or higher and lower than 7 mm2/s or (A1) the lubricating oil and (A2) a lubricating base oil with a kinematic viscosity at 100° C. of 7 to 50 mm2/s, blended with (B) a poly(meth)acrylate-based additive, so that the composition has a kinematic viscosity at 100° C. of 3 to 8 mm2/s and a viscosity index of 95 to 200, (A) and (B) fulfill a specific requirement. The compositions achieve long fatigue life though having low viscosity.
摘要:
Provided is a lubricating oil composition for manual transmissions which has anti-seizure properties for shift forks and can provide manual transmissions with excellent shifting characteristics though it has a low viscosity and can save fuel to be used in automobiles. The lubricating oil composition for manual transmissions comprises a lubricating base oil with a kinematic viscosity at 100° C. of 4 to 6 mm2/s, on the basis of the total mass of the composition, (A) 0.14 to 0.20 percent by mass in terms of magnesium of magnesium sulfonate, (B) 0.14 to 0.18 percent by mass in terms of zinc of a specific zinc dithiophosphate, (C) 0.3 to 0.5 percent by mass in terms of sulfur of a sulfur-containing extreme pressure additive other than zinc dithiophosphate, and (D) 0.02 to 0.05 percent by mass in terms of phosphorus of an alkyl phosphite, and having a kinematic viscosity at 40° C. of 25 to 30 mm2/s.
摘要:
The GaN facet growth method produces defect accumulating regions H on masks by forming a dotmask or a stripemask on an undersubstrate, growing GaN in a reaction furnace in vapor phase, inducing GaN crystals on exposed parts without covering the masks, inviting facets starting from verges of the masks and producing defect accumulating regions H on the mask. The defect accumulating regions H have four versions, that is, non (O), polycrystal (P), c-axis inclining single crystal (A) and orientation inversion (J). The best is the orientation inversion region (J). A sign of occurrence of the orientation inversion regions (J) is beaks of inversion orientation appearing on facets. GaN is grown on a masked undersubstrate by supplying a carbon material at a hydrocarbon partial pressure of 10 Pa to 5 kPa for 0.5 hour to 2 hour by an HVPE facet growth method without burying facets.
摘要:
There is provided a disc player apparatus capable of transporting a disc (11) by holding the disc (11) between a lower roller (70) and an upper roller (80). The lower roller (70) and the upper roller (80) are rockably supported with respect to a main body (20a). A flat spring (210) which urges the upper roller (80) is attached to an upper case (200a) that is attached to the main body (20a). The urge of the flat spring (210) is applied via a roller support member (810) which supports the upper roller (80). The pressure is applied evenly to the upper roller (80), enabling to reduce diagonal travel of the disc for example, and to transport the disc smoothly.