Abstract: A smoothing structure containing indium is formed between the substrate and the active region of a III-nitride light emitting device to improve the surface characteristics of the device layers. In some embodiments, the smoothing structure is a single layer, separated from the active region by a spacer layer which typically does not contain indium. The smoothing layer contains a composition of indium lower than the active region, and is typically deposited at a higher temperature than the active region. The spacer layer is typically deposited while reducing the temperature in the reactor from the smoothing layer deposition temperature to the active region deposition temperature. In other embodiments, a graded smoothing region is used to improve the surface characteristics. The smoothing region may have a graded composition, graded dopant concentration, or both.

Abstract: The present invention is an inverted III-nitride light-emitting device (LED) with enhanced total light generating capability. A large area device has an n-electrode that interposes the p-electrode metallization to provide low series resistance. The p-electrode metallization is opaque, highly reflective, and provides excellent current spreading. The p-electrode at the peak emission wavelength of the LED active region absorbs less than 25% of incident light per pass. A submount may be used to provide electrical and thermal connection between the LED die and the package. The submount material may be Si to provide electronic functionality such as voltage-compliance limiting operation. The entire device, including the LED-submount interface, is designed for low thermal resistance to allow for high current density operation. Finally, the device may include a high-refractive-index (n>1.8) superstrate.

Abstract: A semiconductor device is provided having n-type device layers of III-V nitride having donor dopants such as germanium (Ge), silicon (Si), tin (Sn), and/or oxygen (O) and/or p-type device layers of III-V nitride having acceptor dopants such as magnesium (Mg), beryllium (Be), zinc (Zn), and/or cadmium (Cd), either simultaneously or in a doping superlattice, to engineer strain, improve conductivity, and provide longer wavelength light emission.

Abstract: An electronic device includes a disk selection and drive apparatus to select and drive a plurality of disks or other recording media. Cartridges, each housing a recording medium therein, are held in holding areas in a disk container. Support rods of a drive unit are supported by elongated support holes to be movable in the vertical direction. A first drive member and a second drive member, each having inclined guide portions and releasing portions for guiding the support rods, are provided. A rotary member has cams to drive the first and second drive members, respectively. The cams are grooves with arched portions. When a protrusion of the first or second drive members is confined and moved by the cams, the drive unit is positioned opposite a selected one of any of the holding areas. When the first drive member is moved through a predetermined distance in the horizontal direction, the drive unit is moved vertically to access some of the holding areas.

Abstract: A cassette tape player includes a cassette carrying mechanism which conveys a cassette tape between the insertion position and the hold position of the player automatically, a mode selection lever which reciprocates depending on various operational modes, and a drive motor which drives the cassette carrying mechanism and the mode selection lever, a lock mechanism which selectively prevents the movement of the mode selection lever or the cassette carrying mechanism, and a planetary gear mechanism coupled between the drive motor and the mode selection lever and the cassette carrying mechanism. The planetary gear mechanism includes a sun gear rotated by the drive motor, a ring gear which steadily meshes with one of a first rack provided on the mode selection lever and a second rack provided on the cassette carrying mechanism, and a carrier which steadily meshes with another of the first rack and second rack.