Abstract:
PROBLEM TO BE SOLVED: To provide a light-emitting diode of a structure, wherein the diode has an active layer and clad layers and the deterioration of the diode at the time when light is radiated by an emission recombination generated in the active layer is reduced. SOLUTION: This light-emitting diode is a light-emitting diode of a structure, wherein the diode has a first conductivity type first clad layer, an active layer and a second conductivity type second clad layer, a first electrode is connected with the first clad layer, a second electrode is connected with the second clad layer and light is radiated by an emission recombination generated in the active layer when a voltage is applied to the first and second electrodes and a current is injected in the first and second electrodes, and a current injection structure from the second electrode 24 is formed into a constitution, wherein the current injection structure is divided into a plurality of pieces by a current non-injection region 23.
Abstract:
PURPOSE: To make a short-wavelength light emission possible at room temperatures and to contrive the stabilization of the performance characteristics, such as current-voltage characteristic and current-light output characteristic, and the prolongation of the life of the device in the II-VI compound semiconductor light-emitting device. CONSTITUTION: A semiconductor light-emitting device constituted of at least a first conductivity type first clad layer 2, an active layer 3 and a second conductivity type second clad layer 4 are provided on a substrate 1, at least the layer 3 consists of a II-VI compound semiconductor and this layer 3 is doped with either of an N-type dopant and a P-type dopant or both of the N-type and P-type dopants.
Abstract:
PURPOSE:To materialize a semiconductor light emitting element which can emit green or blue light from the face, using a II-VI compound semiconductor. CONSTITUTION:An n-type ZnSSe layer 3, an n-type ZnMgSSe clad layer 4, an n-type ZnSSe light waveguide layer 5, an active layer 6, a p-type ZnSSe light waveguide layer 7, a p-type ZnMgSSe clad layer 8, a p-type ZnSSe layer 9, a p-type ZnSe contact layer 10, a p-type ZnSe/ZnTeMQW layer 11, and a p-type ZnTe contact layer 12 are formed in order through an n-type ZnSe buffer layer 2 on an n-type GaAs substrate 1. Together with it, a lattice-shaped electrode 13 on p side and an Au film 14 to cover it are provided on the p-type ZnTe contact layer 12, and an electrode 15 on n side is provided on the rear of the n-type GaAs substrate 1. The active layer 6 is of single quantum well structure or multiple quantum well structure including, for example, a ZnCdSe quantum well layer.
Abstract:
PROBLEM TO BE SOLVED: To provide a manufacturing method of a semiconductor light emitting device capable of forming end surface window structure by Zn solid phase diffusion which can be performed in low temperature and short time, furthermore is independent of thickness. SOLUTION: The manufacturing method of the semiconductor light emitting device comprises a process of selectively depositing a ZnO film 13b in a portion with respect to a location adjacent to a resonator end surface of a layered product having at least a first and a second conductive type cladding layers in such a manner that they sandwich active layers 6, and a process of forming a window structure 15 by performing a thermal diffusion treatment in a diffusion temperature of 600°C or less and 450°C or more, and a diffusion time of 20 minute or less and 3 minute or more, furthermore by diffusing Zn of the above-mentioned ZnO film 13b inside the above-mentioned layered product in solid phase diffusion. COPYRIGHT: (C)2006,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To provide a semiconductor laser employing a nitride based III-V compound semiconductor in which a high output can be ensured easily. SOLUTION: Between a p-side contact layer 43 and a p-side electrode 52, a high-resistance layer 64 is provided in correspondence with the region of an active layer 30 except for the opposite ends thereof in the direction A of a resonator. The opposite ends of the active layer 30 in the direction A of the resonator are current non-injection regions and the part of the active layer 30 corresponding to the p-side contact layer 43 in the region except for the opposite ends in the direction A of the resonator is the current injection region. Consequently, non-emission recombination is prevented effectively on the end faces 1a and 1b of the resonator and in the vicinity thereof, a temperature rise is suppressed on the end faces 1a and 1b of the resonator and in the vicinity thereof, and COD is prevented. COPYRIGHT: (C)2004,JPO
Abstract:
PROBLEM TO BE SOLVED: To provide a method for manufacturing a semiconductor element for facilitating its working by alleviating a warp of a substrate having an element formed thereon. SOLUTION: The method for manufacturing the semiconductor element comprises the steps of dry etching between adjacent laser structures 10 on a substrate 11, and forming trenches 30A parallel to laser stripes and trenches 30B (trenches 30) perpendicular to the trenches 30A. The etching depth (the depth of the trenches 30) at that time is D reaching the substrate 11 from the surface, and a width of 10 μm. A stress operating at an interface between a semiconductor layer and the substrate 11 is dispersed and reduced by forming the trenches 30. Thus, in the following steps, the warp of the substrate 11 is reduced.
Abstract:
PROBLEM TO BE SOLVED: To provide a semiconductor laser and method of manufacturing the same, which can enlarge an ohmic contact area between a nitride-based III-V compound semiconductor layer and an electrode to reduce contact resistance. SOLUTION: Between a p-type clad layer 18 and a p-side contact layer 19, an insulating layer 21, having an opening 21a at a place which corresponds to current injection region of an active layer 16 is formed. The p-type clad layer 18 has a projecting part 18a, which is salient on the p-side contact layer 19 side in correspondence with the opening 21a of the insulating layer 21. The p-side contact layer 19 consists of a basic growth region 19a formed so as to correspond to the projecting part 18a of the p-type clad layer 18, and a regrowth region 19b, which is grown with the basic growth region 19a and projecting part 18a as a base. The width of the p-side contact layer 19 is enlarged by the regrowth region 19b, which increases the ohmic contact area between the p-side contact layer and the p-side electrode 23, and thereby decreases the contact resistance.
Abstract:
PROBLEM TO BE SOLVED: To provide a method of growing a semiconductor layer such as a GaN layer grown in excellent crystal having a small number of through dislocations and a semiconductor light emitting device formed through the same. SOLUTION: A groove G having an inner side nearly vertical to the main surface of a substrate is provided to the III-V compound semiconductor substrate such as a GaN substrate, extending in a prescribed direction such as a direction or a direction, and a III-V compound semiconductor layer such as a GaN layer is made to grow through a vapor growth method under conditions that a growth rate in the direction of the main surface of the substrate 30 is set faster than that in the direction vertical to the main surface of the substrate 30. Before a vapor growth is carried out, mask layers (33a and 33b) may be formed on the surface of the substrate 30 except the base of the groove G and a groove G forming region.
Abstract:
PROBLEM TO BE SOLVED: To provide a semiconductor laser for obtaining a crystal growth layer with less fluctuation in a crystal axis and for improving the characteristics of a device, a semiconductor device and a nitride-family III-V group compound substrate, and their manufacturing method. SOLUTION: A plurality of seed crystal layers 12 provided separately on one surface side of a substrate 11 for growth, and an n-side contact layer 13 that is grown based on the plurality of seed crystal layers and has a growth region in a crosswise direction, are provided. In the seed crystal layer 12, the product of width w1 (unit: μm) of a boundary surface 12a with the n-side contact layer 13 in its arranged direction A and thickness t1 (unit: μm) in a direction where the n-side contact layer 13 is laminated is set to 15 or less, thus reducing the fluctuation of the crystal axis on the n-side contact layer 13, and hence improving the crystallinity of a semiconductor layer from an n-type clad layer 14 to a p-side contact layer 19 being laminated on the n-side contact layer 13.
Abstract:
PROBLEM TO BE SOLVED: To grow high-quality single-crystal nitride-based III-V compound semiconductor having a low density of crystal defects. SOLUTION: A growing mask is formed on a substrate. When nitride-based III-V compound semiconductor is grown on the substrate by using this growing mask, a multilayer film at least having a top surface consisting of nitride as a growing mask. The growing masks consist of, for example, an oxide film and a nitride film thereon, a metal film and a nitride film thereon, an oxide film, a film consisting of nitride and oxide thereon and a nitride film thereon, a first metal film, a second metal film thereon and a nitride film thereon and so on. The oxide film is a SiO2 film or the like, the nitride film is a TiN film, SiN film or the like, the film consisting of oxide and nitride is a SiNO film or the like and the metal film is a Ti film, Pt film or the like.