Abstract:
According to one embodiment, a semiconductor light emitting device includes first and second electrode layers, a and second semiconductor layers, a light emitting layer and a first intermediate layer. The first electrode layer has a metal portion having through-holes. The second electrode layer is stacked with the first electrode layer along a stacked direction, and light-reflective. The first semiconductor layer is provided between the first and second electrode layers, and has a first conductivity type. The second semiconductor layer is provided between the first semiconductor layer and the second electrode layer, and has a second conductivity type. The light emitting layer is provided between the first and second semiconductor layers. The first intermediate layer is provided between the second semiconductor layer and the second electrode layer, transmissive to light emitted from the light emitting layer, and includes first contact portions and a first non-contact portion.
Abstract:
The present invention provides such a formation method that an antireflection structure having excellent antireflection functions can be formed in a large area and at small cost. Further, the present invention also provides an antireflection structure formed by that method. In the formation method, a base layer and particles placed thereon are subjected to an etching process. The particles on the base layer serve as an etching mask in the process, and hence they are more durable against etching than the base layer. The etching rate ratio of the base layer to the particles is more than 1 but not more than 5. The etching process is stopped before the particles disappear. It is also possible to produce an antireflection structure by nanoimprinting method employing a stamper. The stamper is formed by use of a master plate produced according to the above formation method.
Abstract:
The present invention provides a semiconductor light-emitting element comprising an electrode part excellent in ohmic contact and capable of emitting light from the whole surface. An electrode layer placed on the light-extraction side comprises a metal part and plural openings. The metal part is so continuous that any pair of point-positions in the part is continuously connected without breaks, and the metal part in 95% or more of the whole area continues linearly without breaks by the openings in a straight distance of not more than ⅓ of the wavelength of light emitted from an active layer. The average opening diameter is of 10 nm to ⅓ of the wavelength of emitted light. The electrode layer has a thickness of 10 nm to 200 nm, and is in good ohmic contact with a semiconductor layer.
Abstract:
The present invention provides a highly efficient light-extraction layer and an organic electroluminescence element excellent in light-extraction efficiency. The light-extraction layer of the present invention comprises a reflecting layer and a three-dimensional diffraction layer formed thereon. The diffraction layer comprises fine particles having a variation coefficient of the particle diameter of 10% or less and of a matrix having a refractive index different from that of the fine particles. The particles have a volume fraction of 50% or more based on the volume of the diffraction layer. The particles are arranged to form first areas having short-distance periodicity, and the first areas are disposed and adjacent to each other in random directions to form second areas. The organic electroluminescence element of the present invention comprises the above light-extraction layer.
Abstract:
The present invention provides a light-transmitting metal electrode including a substrate and a metal electrode layer having plural openings. The metal electrode layer also has such a continuous metal part that any pair of point-positions in the part is continuously connected without breaks. The openings in the metal electrode layer are periodically arranged to form plural microdomains. The plural microdomains are so placed that the in-plane arranging directions thereof are oriented independently of each other. The thickness of the metal electrode layer is in the range of 10 to 200 nm.
Abstract:
A method for arranging particles according to one aspect of the present invention comprises the steps of: forming a thin film on a surface of a substrate, the thin film being obtained by dispersing first particles made of metal in a material, a surface of the material is to be charged to a first polarity in a predetermined solution; dispersing second particles in the solution, the second particles being charged to a second polarity opposite to the first polarity; immersing the thin film in the solution; and irradiating the thin film with light having a wavelength which causes plasmon resonance with surface plasmons of the metal particles.
Abstract:
An organic electroluminescent device is provided, which includes an emission portion comprising a first electrode and a second electrode and an organic layer sandwiched between the first and second electrodes, and a diffraction grating disposed neighboring on the emission portion, the diffraction grating having first regions and a second region, the first regions comprising a plurality of pair of recessed and projected portions, the plurality of pair of recessed and projected portions being periodically arranged and provided with a primitive translation vector of a direction, the second region comprising an aggregate of the first regions and located parallel with an emission surface of the organic electroluminescent device.
Abstract:
It is the object to minimize a magnetic influence, on the outside, of a semiconductor chip which is formed on a substrate includes inductor conductors. A semiconductor chip 2 including inductor conductors is mounted on a substrate 1 and a plurality of through holes 8 are formed in the area on the outside of the mounting position. Shielding members 4 are formed on the chip mounting side and the opposite side of the substrate 1 and in the through holes 8 so as to cover the semiconductor chip 2 with the shielding members 4 from both sides of the substrate 1. Therefore, magnetic fluxes from a circuit formed on the semiconductor chip 2 do not leak out from the shielding members 4, but circulate inside the shielding members 4.
Abstract:
A process of producing a highly spin-polarized electron beam, including the steps of applying a light energy to a semiconductor device comprising a first compound semiconductor layer having a first lattice constant and a second compound semiconductor layer having a second lattice constant different from the first lattice constant, the second semiconductor layer being in junction contact with the first semiconductor layer to provide a strained semiconductor heterostructure, a magnitude of mismatch between the first and second lattice constants defining an energy splitting between a heavy hole band and a light hole band in the second semiconductor layer, such that the energy splitting is greater than a thermal noise energy in the second semiconductor layer in use; and extracting the highly spin-polarized electron beam from the second semiconductor layer upon receiving the light energy. A semiconductor device for emitting, upon receiving a light energy, a highly spin-polarized electron beam, including a first compound semiconductor layer formed of gallium arsenide phosphide, GaAs.sub.1-x P.sub.x, and having a first lattice constant; and a second compound semiconductor layer provided on the first semiconductor layer, the second semiconductor layer having a second lattice constant different from the first lattice constant and a thickness, t, smaller than the thickness of the first semiconductor layer.
Abstract:
This invention relates to a rotary structure adapted to be used for a spindle unit of a miniature motor or miniature rotor or for a tape guide roller of a VTR or the like. In the structure of the rotary mechanism, instead of the conventional expensive radial ball bearings, recessed step parts are formed in the shaft itself and balls are held by and between the recessed step parts and ball receiving surfaces formed as tapered surfaces surfaces on outer races provided around the periphery of the shaft.